Updated kernel packages that fix a security issue and several bugs are now available for Red Hat Enterprise Linux 4.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

These updated packages fix the following security issue :

* a possible kernel memory leak was found in the Linux kernel Simple Internet Transition (SIT) INET6 implementation. This could allow a local unprivileged user to cause a denial of service. (CVE-2008-2136, Important)

As well, these updated packages fix the following bugs :

* a possible kernel hang on hugemem systems, due to a bug in NFS, which may have caused systems to become unresponsive, has been resolved.

* an inappropriate exit condition occurred in the architecture-specific 'mmap()' realization, which fell into an infinite loop under certain conditions. On 64-bit systems, this issue may have manifested itself to users as a soft lockup, or process hangs.

* due to a bug in hardware initialization in the 'ohci_hcd' kernel module, the kernel may have failed with a NULL pointer dereference. On 64-bit PowerPC systems, this may have caused booting to fail, and drop to xmon. On other platforms, a kernel oops occurred.

* due to insufficient locks in task termination code, a panic may have occurred in the 'sys_times()' system call on SMP machines.

Red Hat Enterprise Linux 4 users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated firefox packages that fix various security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

[Updated 16th July 2008] The nspluginwrapper package has been added to this advisory to satisfy a missing package dependency issue.

Mozilla Firefox is an open source Web browser.

An integer overflow flaw was found in the way Firefox displayed certain web content. A malicious website could cause Firefox to crash, or execute arbitrary code with the permissions of the user running Firefox. (CVE-2008-2785)

A flaw was found in the way Firefox handled certain command line URLs.
If another application passed Firefox a malformed URL, it could result in Firefox executing local malicious content with chrome privileges.
(CVE-2008-2933)

All firefox users should upgrade to these updated packages, which contain Firefox 3.0.1 that corrects these issues.

Updated bluez-libs and bluez-utils packages that fix a security flaw are now available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The bluez-libs package contains libraries for use in Bluetooth applications. The bluez-utils package contains Bluetooth daemons and utilities.

An input validation flaw was found in the Bluetooth Session Description Protocol (SDP) packet parser used by the Bluez Bluetooth utilities. A Bluetooth device with an already-established trust relationship, or a local user registering a service record via a UNIX(r) socket or D-Bus interface, could cause a crash, or possibly execute arbitrary code with privileges of the hcid daemon.
(CVE-2008-2374)

Users of bluez-libs and bluez-utils are advised to upgrade to these updated packages, which contains a backported patch to correct this issue.

Updated vim packages that fix security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

Vim (Visual editor IMproved) is an updated and improved version of the vi editor.

Several input sanitization flaws were found in Vim's keyword and tag handling. If Vim looked up a document's maliciously crafted tag or keyword, it was possible to execute arbitrary code as the user running Vim. (CVE-2008-4101)

Multiple security flaws were found in netrw.vim, the Vim plug-in providing file reading and writing over the network. If a user opened a specially crafted file or directory with the netrw plug-in, it could result in arbitrary code execution as the user running Vim.
(CVE-2008-3076)

A security flaw was found in zip.vim, the Vim plug-in that handles ZIP archive browsing. If a user opened a ZIP archive using the zip.vim plug-in, it could result in arbitrary code execution as the user running Vim. (CVE-2008-3075)

A security flaw was found in tar.vim, the Vim plug-in which handles TAR archive browsing. If a user opened a TAR archive using the tar.vim plug-in, it could result in arbitrary code execution as the user runnin Vim. (CVE-2008-3074)

Several input sanitization flaws were found in various Vim system functions. If a user opened a specially crafted file, it was possible to execute arbitrary code as the user running Vim. (CVE-2008-2712)

Ulf Harnhammar, of Secunia Research, discovered a format string flaw in Vim's help tag processor. If a user was tricked into executing the 'helptags' command on malicious data, arbitrary code could be executed with the permissions of the user running Vim. (CVE-2007-2953)

All Vim users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.

An updated rdesktop package that fixes a security issue is now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

rdesktop is an open source client for Microsoft Windows NT Terminal Server and Microsoft Windows 2000 and 2003 Terminal Services, capable of natively using the Remote Desktop Protocol (RDP) to present the user's NT desktop. No additional server extensions are required.

An integer underflow and integer signedness issue were discovered in the rdesktop. If an attacker could convince a victim to connect to a malicious RDP server, the attacker could cause the victim's rdesktop to crash or, possibly, execute an arbitrary code. (CVE-2008-1801, CVE-2008-1803)

Users of rdesktop should upgrade to these updated packages, which contain a backported patches to resolve these issues.

Updated firefox packages that fix several security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

Mozilla Firefox is an open source Web browser.

Multiple flaws were found in the processing of malformed JavaScript content. A web page containing such malicious content could cause Firefox to crash or, potentially, execute arbitrary code as the user running Firefox. (CVE-2008-2801, CVE-2008-2802, CVE-2008-2803)

Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code as the user running Firefox.
(CVE-2008-2798, CVE-2008-2799, CVE-2008-2811)

Several flaws were found in the way malformed web content was displayed. A web page containing specially crafted content could potentially trick a Firefox user into surrendering sensitive information. (CVE-2008-2800)

Two local file disclosure flaws were found in Firefox. A web page containing malicious content could cause Firefox to reveal the contents of a local file to a remote attacker. (CVE-2008-2805, CVE-2008-2810)

A flaw was found in the way a malformed .properties file was processed by Firefox. A malicious extension could read uninitialized memory, possibly leaking sensitive data to the extension. (CVE-2008-2807)

A flaw was found in the way Firefox escaped a listing of local file names. If a user could be tricked into listing a local directory containing malicious file names, arbitrary JavaScript could be run with the permissions of the user running Firefox. (CVE-2008-2808)

A flaw was found in the way Firefox displayed information about self-signed certificates. It was possible for a self-signed certificate to contain multiple alternate name entries, which were not all displayed to the user, allowing them to mistakenly extend trust to an unknown site. (CVE-2008-2809)

All Mozilla Firefox users should upgrade to these updated packages, which contain backported patches that correct these issues.

Updated ruby packages that fix several security issues are now available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

Ruby is an interpreted scripting language for quick and easy object-oriented programming.

Multiple integer overflows leading to a heap overflow were discovered in the array- and string-handling code used by Ruby. An attacker could use these flaws to crash a Ruby application or, possibly, execute arbitrary code with the privileges of the Ruby application using untrusted inputs in array or string operations. (CVE-2008-2376, CVE-2008-2662, CVE-2008-2663, CVE-2008-2725, CVE-2008-2726)

It was discovered that Ruby used the alloca() memory allocation function in the format (%) method of the String class without properly restricting maximum string length. An attacker could use this flaw to crash a Ruby application or, possibly, execute arbitrary code with the privileges of the Ruby application using long, untrusted strings as format strings. (CVE-2008-2664)

Red Hat would like to thank Drew Yao of the Apple Product Security team for reporting these issues.

Users of Ruby should upgrade to these updated packages, which contain a backported patch to resolve these issues.

Updated php packages that fix several security issues and a bug are now available for Red Hat Enterprise Linux 4.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Web server.

It was discovered that the PHP escapeshellcmd() function did not properly escape multi-byte characters which are not valid in the locale used by the script. This could allow an attacker to bypass quoting restrictions imposed by escapeshellcmd() and execute arbitrary commands if the PHP script was using certain locales. Scripts using the default UTF-8 locale are not affected by this issue.
(CVE-2008-2051)

The PHP functions htmlentities() and htmlspecialchars() did not properly recognize partial multi-byte sequences. Certain sequences of bytes could be passed through these functions without being correctly HTML-escaped. Depending on the browser being used, an attacker could use this flaw to conduct cross-site scripting attacks. (CVE-2007-5898)

A PHP script which used the transparent session ID configuration option, or which used the output_add_rewrite_var() function, could leak session identifiers to external websites. If a page included an HTML form with an ACTION attribute referencing a non-local URL, the user's session ID would be included in the form data passed to that URL. (CVE-2007-5899)

It was discovered that the PHP fnmatch() function did not restrict the length of the string argument. An attacker could use this flaw to crash the PHP interpreter where a script used fnmatch() on untrusted input data. (CVE-2007-4782)

It was discovered that PHP did not properly seed its pseudo-random number generator used by functions such as rand() and mt_rand(), possibly allowing an attacker to easily predict the generated pseudo-random values. (CVE-2008-2107, CVE-2008-2108)

As well, these updated packages fix the following bug :

* after 2008-01-01, when using PEAR version 1.3.6 or older, it was not possible to use the PHP Extension and Application Repository (PEAR) to upgrade or install packages. In these updated packages, PEAR has been upgraded to version 1.4.9, which restores support for the current pear.php.net update server. The following changes were made to the PEAR packages included in php-pear: Console_Getopt and Archive_Tar are now included by default, and XML_RPC has been upgraded to version 1.5.0.

All php users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated kernel packages that fix various security issues and a bug are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

These updated packages fix the following security issues :

* A security flaw was found in the Linux kernel memory copy routines, when running on certain AMD64 systems. If an unsuccessful attempt to copy kernel memory from source to destination memory locations occurred, the copy routines did not zero the content at the destination memory location. This could allow a local unprivileged user to view potentially sensitive data. (CVE-2008-2729, Important)

* Tavis Ormandy discovered a deficiency in the Linux kernel 32-bit and 64-bit emulation. This could allow a local unprivileged user to prepare and run a specially crafted binary, which would use this deficiency to leak uninitialized and potentially sensitive data.
(CVE-2008-0598, Important)

* Brandon Edwards discovered a missing length validation check in the Linux kernel DCCP module reconciliation feature. This could allow a local unprivileged user to cause a heap overflow, gaining privileges for arbitrary code execution. (CVE-2008-2358, Moderate)

As well, these updated packages fix the following bug :

* Due to a regression, 'gettimeofday' may have gone backwards on certain x86 hardware. This issue was quite dangerous for time-sensitive systems, such as those used for transaction systems and databases, and may have caused applications to produce incorrect results, or even crash.

Red Hat Enterprise Linux 5 users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated evolution packages that fix two buffer overflow vulnerabilities are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

Evolution is the integrated collection of e-mail, calendaring, contact management, communications and personal information management (PIM) tools for the GNOME desktop environment.

A flaw was found in the way Evolution parsed iCalendar timezone attachment data. If the Itip Formatter plug-in was disabled and a user opened a mail with a carefully crafted iCalendar attachment, arbitrary code could be executed as the user running Evolution. (CVE-2008-1108)

Note: the Itip Formatter plug-in, which allows calendar information (attachments with a MIME type of 'text/calendar') to be displayed as part of the e-mail message, is enabled by default.

A heap-based buffer overflow flaw was found in the way Evolution parsed iCalendar attachments with an overly long 'DESCRIPTION' property string. If a user responded to a carefully crafted iCalendar attachment in a particular way, arbitrary code could be executed as the user running Evolution. (CVE-2008-1109).

The particular response required to trigger this vulnerability was as follows :

1. Receive the carefully crafted iCalendar attachment. 2. Accept the associated meeting. 3. Open the calender the meeting was in. 4. Reply to the sender.

Red Hat would like to thank Alin Rad Pop of Secunia Research for responsibly disclosing these issues.

All Evolution users should upgrade to these updated packages, which contain backported patches which resolves these issues.

Updated xorg-x11-server packages that fix several security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

X.Org is an open source implementation of the X Window System. It provides basic low-level functionality that full-fledged graphical user interfaces are designed upon.

An input validation flaw was discovered in X.org's Security and Record extensions. A malicious authorized client could exploit this issue to cause a denial of service (crash) or, potentially, execute arbitrary code with root privileges on the X.Org server. (CVE-2008-1377)

Multiple integer overflow flaws were found in X.org's Render extension. A malicious authorized client could exploit these issues to cause a denial of service (crash) or, potentially, execute arbitrary code with root privileges on the X.Org server. (CVE-2008-2360, CVE-2008-2361, CVE-2008-2362)

An input validation flaw was discovered in X.org's MIT-SHM extension.
A client connected to the X.org server could read arbitrary server memory. This could result in the sensitive data of other users of the X.org server being disclosed. (CVE-2008-1379)

Users of xorg-x11-server should upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated gnutls packages that fix several security issues are now available for Red Hat Enterprise Linux 4.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The GnuTLS Library provides support for cryptographic algorithms and protocols such as TLS. GnuTLS includes libtasn1, a library developed for ASN.1 structures management that includes DER encoding and decoding.

Flaws were found in the way GnuTLS handles malicious client connections. A malicious remote client could send a specially crafted request to a service using GnuTLS that could cause the service to crash. (CVE-2008-1948, CVE-2008-1949, CVE-2008-1950)

We believe it is possible to leverage the flaw CVE-2008-1948 to execute arbitrary code but have been unable to prove this at the time of releasing this advisory. Red Hat Enterprise Linux 4 does not ship with any applications directly affected by this flaw. Third-party software which runs on Red Hat Enterprise Linux 4 could, however, be affected by this vulnerability. Consequently, we have assigned it important severity.

Users of GnuTLS are advised to upgrade to these updated packages, which contain a backported patch that corrects these issues.

Updated gnutls packages that fix several security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

The GnuTLS Library provides support for cryptographic algorithms and protocols such as TLS. GnuTLS includes libtasn1, a library developed for ASN.1 structures management that includes DER encoding and decoding.

Flaws were found in the way GnuTLS handles malicious client connections. A malicious remote client could send a specially crafted request to a service using GnuTLS that could cause the service to crash. (CVE-2008-1948, CVE-2008-1949, CVE-2008-1950)

We believe it is possible to leverage the flaw CVE-2008-1948 to execute arbitrary code but have been unable to prove this at the time of releasing this advisory. Red Hat Enterprise Linux 5 includes applications, such as CUPS, that would be directly vulnerable to any such an exploit, however. Consequently, we have assigned it critical severity.

Users of GnuTLS are advised to upgrade to these updated packages, which contain a backported patch that corrects these issues.

An updated nfs-utils package that fixes a security issue is now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The nfs-utils package provides a daemon for the kernel NFS server and related tools.

A flaw was found in the nfs-utils package build. The nfs-utils package was missing TCP wrappers support, which could result in an administrator believing they had access restrictions enabled when they did not. (CVE-2008-1376)

Users of nfs-utils are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue.

Updated samba packages that fix a security issue and two bugs are now available for Red Hat Enterprise Linux 5.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

Samba is a suite of programs used by machines to share files, printers, and other information.

A heap-based buffer overflow flaw was found in the way Samba clients handle over-sized packets. If a client connected to a malicious Samba server, it was possible to execute arbitrary code as the Samba client user. It was also possible for a remote user to send a specially crafted print request to a Samba server that could result in the server executing the vulnerable client code, resulting in arbitrary code execution with the permissions of the Samba server.
(CVE-2008-1105)

Red Hat would like to thank Alin Rad Pop of Secunia Research for responsibly disclosing this issue.

This update also addresses two issues which prevented Samba from joining certain Windows domains with tightened security policies, and prevented certain signed SMB content from working as expected :

* when some Windows(r) 2000-based domain controllers were set to use mandatory signing, Samba clients would drop the connection because of an error when generating signatures. This presented as a 'Server packet had invalid SMB signature' error to the Samba client. This update corrects the signature generation error.

* Samba servers using the 'net ads join' command to connect to a Windows Server(r) 2003-based domain would fail with 'failed to get schannel session key from server' and 'NT_STATUS_ACCESS_DENIED' errors. This update correctly binds to the NETLOGON share, allowing Samba servers to connect to the domain properly.

Users of Samba are advised to upgrade to these updated packages, which contain a backported patch to resolve these issues.

Updated kernel packages that fix various security issues and several bugs are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

These updated packages fix the following security issues :

* on AMD64 architectures, the possibility of a kernel crash was discovered by testing the Linux kernel process-trace ability. This could allow a local unprivileged user to cause a denial of service (kernel crash). (CVE-2008-1615, Important)

* on 64-bit architectures, the possibility of a timer-expiration value overflow was found in the Linux kernel high-resolution timers functionality, hrtimer. This could allow a local unprivileged user to setup a large interval value, forcing the timer expiry value to become negative, causing a denial of service (kernel hang). (CVE-2007-6712, Important)

* the possibility of a kernel crash was found in the Linux kernel IPsec protocol implementation, due to improper handling of fragmented ESP packets. When an attacker controlling an intermediate router fragmented these packets into very small pieces, it would cause a kernel crash on the receiving node during packet reassembly.
(CVE-2007-6282, Important)

* a potential denial of service attack was discovered in the Linux kernel PWC USB video driver. A local unprivileged user could use this flaw to bring the kernel USB subsystem into the busy-waiting state, causing a denial of service. (CVE-2007-5093, Low)

As well, these updated packages fix the following bugs :

* in certain situations, a kernel hang and a possible panic occurred when disabling the cpufreq daemon. This may have prevented system reboots from completing successfully.

* continual 'softlockup' messages, which occurred on the guest's console after a successful save and restore of a Red Hat Enterprise Linux 5 para-virtualized guest, have been resolved.

* in the previous kernel packages, the kernel may not have reclaimed NFS locks after a system reboot.

Red Hat Enterprise Linux 5 users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.

An updated gpdf package that fixes a security issue is now available for Red Hat Enterprise Linux 4.

This update has been rated as having important security impact by the Red Hat Security Response Team.

gpdf is a GNOME-based viewer for Portable Document Format (PDF) files.

Kees Cook discovered a flaw in the way gpdf displayed malformed fonts embedded in PDF files. An attacker could create a malicious PDF file that would cause gpdf to crash, or, potentially, execute arbitrary code when opened. (CVE-2008-1693)

Users of gpdf are advised to upgrade to this updated package, which contains a backported patch to resolve this issue.

Updated poppler packages that fix a security issue are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

Poppler is a PDF rendering library, used by applications such as Evince.

Kees Cook discovered a flaw in the way poppler displayed malformed fonts embedded in PDF files. An attacker could create a malicious PDF file that would cause applications that use poppler -- such as Evince
-- to crash, or, potentially, execute arbitrary code when opened.
(CVE-2008-1693)

Users are advised to upgrade to these updated packages, which contain backported patches to resolve this issue.

Updated kernel packages that fix various security issues and several bugs are now available for Red Hat Enterprise Linux 4.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

These updated packages fix the following security issues :

* the absence of a protection mechanism when attempting to access a critical section of code has been found in the Linux kernel open file descriptors control mechanism, fcntl. This could allow a local unprivileged user to simultaneously execute code, which would otherwise be protected against parallel execution. As well, a race condition when handling locks in the Linux kernel fcntl functionality, may have allowed a process belonging to a local unprivileged user to gain re-ordered access to the descriptor table. (CVE-2008-1669, Important)

* on AMD64 architectures, the possibility of a kernel crash was discovered by testing the Linux kernel process-trace ability. This could allow a local unprivileged user to cause a denial of service (kernel crash). (CVE-2008-1615, Important)

* the absence of a protection mechanism when attempting to access a critical section of code, as well as a race condition, have been found in the Linux kernel file system event notifier, dnotify. This could allow a local unprivileged user to get inconsistent data, or to send arbitrary signals to arbitrary system processes. (CVE-2008-1375, Important)

Red Hat would like to thank Nick Piggin for responsibly disclosing the following issue :

* when accessing kernel memory locations, certain Linux kernel drivers registering a fault handler did not perform required range checks. A local unprivileged user could use this flaw to gain read or write access to arbitrary kernel memory, or possibly cause a kernel crash.
(CVE-2008-0007, Important)

* the possibility of a kernel crash was found in the Linux kernel IPsec protocol implementation, due to improper handling of fragmented ESP packets. When an attacker controlling an intermediate router fragmented these packets into very small pieces, it would cause a kernel crash on the receiving node during packet reassembly.
(CVE-2007-6282, Important)

* a flaw in the MOXA serial driver could allow a local unprivileged user to perform privileged operations, such as replacing firmware.
(CVE-2005-0504, Important)

As well, these updated packages fix the following bugs :

* multiple buffer overflows in the neofb driver have been resolved. It was not possible for an unprivileged user to exploit these issues, and as such, they have not been handled as security issues.

* a kernel panic, due to inconsistent detection of AGP aperture size, has been resolved.

* a race condition in UNIX domain sockets may have caused 'recv()' to return zero. In clustered configurations, this may have caused unexpected failovers.

* to prevent link storms, network link carrier events were delayed by up to one second, causing unnecessary packet loss. Now, link carrier events are scheduled immediately.

* a client-side race on blocking locks caused large time delays on NFS file systems.

* in certain situations, the libATA sata_nv driver may have sent commands with duplicate tags, which were rejected by SATA devices.
This may have caused infinite reboots.

* running the 'service network restart' command may have caused networking to fail.

* a bug in NFS caused cached information about directories to be stored for too long, causing wrong attributes to be read.

* on systems with a large highmem/lowmem ratio, NFS write performance may have been very slow when using small files.

* a bug, which caused network hangs when the system clock was wrapped around zero, has been resolved.

Red Hat Enterprise Linux 4 users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated kernel packages that fix various security issues and several bugs are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

These updated packages fix the following security issues :

* the absence of a protection mechanism when attempting to access a critical section of code has been found in the Linux kernel open file descriptors control mechanism, fcntl. This could allow a local unprivileged user to simultaneously execute code, which would otherwise be protected against parallel execution. As well, a race condition when handling locks in the Linux kernel fcntl functionality, may have allowed a process belonging to a local unprivileged user to gain re-ordered access to the descriptor table. (CVE-2008-1669, Important)

* a possible hypervisor panic was found in the Linux kernel. A privileged user of a fully virtualized guest could initiate a stress-test File Transfer Protocol (FTP) transfer between the guest and the hypervisor, possibly leading to hypervisor panic.
(CVE-2008-1619, Important)

* the absence of a protection mechanism when attempting to access a critical section of code, as well as a race condition, have been found in the Linux kernel file system event notifier, dnotify. This could allow a local unprivileged user to get inconsistent data, or to send arbitrary signals to arbitrary system processes. (CVE-2008-1375, Important)

Red Hat would like to thank Nick Piggin for responsibly disclosing the following issue :

* when accessing kernel memory locations, certain Linux kernel drivers registering a fault handler did not perform required range checks. A local unprivileged user could use this flaw to gain read or write access to arbitrary kernel memory, or possibly cause a kernel crash.
(CVE-2008-0007, Important)

* the absence of sanity-checks was found in the hypervisor block backend driver, when running 32-bit paravirtualized guests on a 64-bit host. The number of blocks to be processed per one request from guest to host, or vice-versa, was not checked for its maximum value, which could have allowed a local privileged user of the guest operating system to cause a denial of service. (CVE-2007-5498, Important)

* it was discovered that the Linux kernel handled string operations in the opposite way to the GNU Compiler Collection (GCC). This could allow a local unprivileged user to cause memory corruption.
(CVE-2008-1367, Low)

As well, these updated packages fix the following bugs :

* on IBM System z architectures, when running QIOASSIST enabled QDIO devices in an IBM z/VM environment, the output queue stalled under heavy load. This caused network performance to degrade, possibly causing network hangs and outages.

* multiple buffer overflows were discovered in the neofb video driver.
It was not possible for an unprivileged user to exploit these issues, and as such, they have not been handled as security issues.

* when running Microsoft Windows in a HVM, a bug in vmalloc/vfree caused network performance to degrade.

* on certain architectures, a bug in the libATA sata_nv driver may have caused infinite reboots, and an 'ata1: CPB flags CMD err flags 0x11' error.

* repeatedly hot-plugging a PCI Express card may have caused 'Bad DLLP' errors.

* a NULL pointer dereference in NFS, which may have caused applications to crash, has been resolved.

* when attempting to kexec reboot, either manually or via a panic-triggered kdump, the Unisys ES7000/one hanged after rebooting in the new kernel, after printing the 'Memory: 32839688k/33685504k available' line.

Red Hat Enterprise Linux 5 users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated thunderbird packages that fix a security issue are now available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

Mozilla Thunderbird is a standalone mail and newsgroup client.

A flaw was found in the processing of malformed JavaScript content. An HTML mail message containing such malicious content could cause Thunderbird to crash or, potentially, execute arbitrary code as the user running Thunderbird. (CVE-2008-1380)

Note: JavaScript support is disabled by default in Thunderbird; the above issue is not exploitable unless JavaScript is enabled.

All Thunderbird users should upgrade to these updated packages, which contain backported patches to resolve these issues.

An updated gnome-screensaver package that fixes a security flaw is now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

gnome-screensaver is the GNOME project's official screen saver program.

A flaw was found in the way gnome-screensaver verified user passwords.
When a system used a remote directory service for login credentials, a local attacker able to cause a network outage could cause gnome-screensaver to crash, unlocking the screen. (CVE-2008-0887)

Users of gnome-screensaver should upgrade to this updated package, which contains a backported patch to correct this issue.

Updated xen packages that fix several security issues and a bug are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The xen packages contain tools for managing the virtual machine monitor in Red Hat Virtualization.

These updated packages fix the following security issues :

Daniel P. Berrange discovered that the hypervisor's para-virtualized framebuffer (PVFB) backend failed to validate the format of messages serving to update the contents of the framebuffer. This could allow a malicious user to cause a denial of service, or compromise the privileged domain (Dom0). (CVE-2008-1944)

Markus Armbruster discovered that the hypervisor's para-virtualized framebuffer (PVFB) backend failed to validate the frontend's framebuffer description. This could allow a malicious user to cause a denial of service, or to use a specially crafted frontend to compromise the privileged domain (Dom0). (CVE-2008-1943)

Chris Wright discovered a security vulnerability in the QEMU block format auto-detection, when running fully-virtualized guests. Such fully-virtualized guests, with a raw formatted disk image, were able to write a header to that disk image describing another format. This could allow such guests to read arbitrary files in their hypervisor's host. (CVE-2008-2004)

Ian Jackson discovered a security vulnerability in the QEMU block device drivers backend. A guest operating system could issue a block device request and read or write arbitrary memory locations, which could lead to privilege escalation. (CVE-2008-0928)

Tavis Ormandy found that QEMU did not perform adequate sanity-checking of data received via the 'net socket listen' option. A malicious local administrator of a guest domain could trigger this flaw to potentially execute arbitrary code outside of the domain. (CVE-2007-5730)

Steve Kemp discovered that the xenbaked daemon and the XenMon utility communicated via an insecure temporary file. A malicious local administrator of a guest domain could perform a symbolic link attack, causing arbitrary files to be truncated. (CVE-2007-3919)

As well, in the previous xen packages, it was possible for Dom0 to fail to flush data from a fully-virtualized guest to disk, even if the guest explicitly requested the flush. This could cause data integrity problems on the guest. In these updated packages, Dom0 always respects the request to flush to disk.

Users of xen are advised to upgrade to these updated packages, which resolve these issues.

Updated cups packages that fix multiple security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The Common UNIX Printing System (CUPS) provides a portable printing layer for UNIX(R) operating systems.

A heap buffer overflow flaw was found in a CUPS administration interface CGI script. A local attacker able to connect to the IPP port (TCP port 631) could send a malicious request causing the script to crash or, potentially, execute arbitrary code as the 'lp' user. Please note: the default CUPS configuration in Red Hat Enterprise Linux 5 does not allow remote connections to the IPP TCP port. (CVE-2008-0047)

Red Hat would like to thank 'regenrecht' for reporting this issue.

This issue did not affect the versions of CUPS as shipped with Red Hat Enterprise Linux 3 or 4.

Two overflows were discovered in the HP-GL/2-to-PostScript filter. An attacker could create a malicious HP-GL/2 file that could possibly execute arbitrary code as the 'lp' user if the file is printed.
(CVE-2008-0053)

A buffer overflow flaw was discovered in the GIF decoding routines used by CUPS image converting filters 'imagetops' and 'imagetoraster'.
An attacker could create a malicious GIF file that could possibly execute arbitrary code as the 'lp' user if the file was printed.
(CVE-2008-1373)

All cups users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated krb5 packages that resolve several issues and fix multiple bugs are now available for Red Hat Enterprise Linux 5.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

Kerberos is a network authentication system which allows clients and servers to authenticate to each other through use of symmetric encryption and a trusted third party, the KDC.

A flaw was found in the way the MIT Kerberos Authentication Service and Key Distribution Center server (krb5kdc) handled Kerberos v4 protocol packets. An unauthenticated remote attacker could use this flaw to crash the krb5kdc daemon, disclose portions of its memory, or possibly execute arbitrary code using malformed or truncated Kerberos v4 protocol requests. (CVE-2008-0062, CVE-2008-0063)

This issue only affected krb5kdc with Kerberos v4 protocol compatibility enabled, which is the default setting on Red Hat Enterprise Linux 4. Kerberos v4 protocol support can be disabled by adding 'v4_mode=none' (without the quotes) to the '[kdcdefaults]' section of /var/kerberos/krb5kdc/kdc.conf.

Jeff Altman of Secure Endpoints discovered a flaw in the RPC library as used by MIT Kerberos kadmind server. An unauthenticated remote attacker could use this flaw to crash kadmind or possibly execute arbitrary code. This issue only affected systems with certain resource limits configured and did not affect systems using default resource limits used by Red Hat Enterprise Linux 5. (CVE-2008-0947)

Red Hat would like to thank MIT for reporting these issues.

Multiple memory management flaws were discovered in the GSSAPI library used by MIT Kerberos. These flaws could possibly result in use of already freed memory or an attempt to free already freed memory blocks (double-free flaw), possibly causing a crash or arbitrary code execution. (CVE-2007-5901, CVE-2007-5971)

In addition to the security issues resolved above, the following bugs were also fixed :

* delegated krb5 credentials were not properly stored when SPNEGO was the underlying mechanism during GSSAPI authentication. Consequently, applications attempting to copy delegated Kerberos 5 credentials into a credential cache received an 'Invalid credential was supplied' message rather than a copy of the delegated credentials. With this update, SPNEGO credentials can be properly searched, allowing applications to copy delegated credentials as expected.

* applications can initiate context acceptance (via gss_accept_sec_context) without passing a ret_flags value that would indicate that credentials were delegated. A delegated credential handle should have been returned in such instances. This updated package adds a temp_ret_flag that stores the credential status in the event no other ret_flags value is passed by an application calling gss_accept_sec_context.

* kpasswd did not fallback to TCP on receipt of certain errors, or when a packet was too big for UDP. This update corrects this.

* when the libkrb5 password-routine generated a set-password or change-password request, incorrect sequence numbers were generated for all requests subsequent to the first request. This caused password change requests to fail if the primary server was unavailable. This updated package corrects this by saving the sequence number value after the AP-REQ data is built and restoring this value before the request is generated.

* when a user's password expired, kinit would not prompt that user to change the password, instead simply informing the user their password had expired. This update corrects this behavior: kinit now prompts for a new password to be set when a password has expired.

All krb5 users are advised to upgrade to these updated packages, which contain backported fixes to address these vulnerabilities and fix these bugs.

Updated dbus packages that fix an issue with circumventing the security policy are now available.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

D-Bus is a system for sending messages between applications. It is used both for the system-wide message bus service, and as a per-user-login-session messaging facility.

Havoc Pennington discovered a flaw in the way the dbus-daemon applies its security policy. A user with the ability to connect to the dbus-daemon may be able to execute certain method calls they should normally not have permission to access. (CVE-2008-0595)

Red Hat does not ship any applications in Red Hat Enterprise Linux 5 that would allow a user to leverage this flaw to elevate their privileges.

This flaw does not affect the version of D-Bus shipped in Red Hat Enterprise Linux 4.

All users are advised to upgrade to these updated dbus packages, which contain a backported patch and are not vulnerable to this issue.

Updated kernel packages that fix various security issues and several bugs are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

These updated packages fix the following security issues :

* a flaw in the hypervisor for hosts running on Itanium architectures allowed an Intel VTi domain to read arbitrary physical memory from other Intel VTi domains, which could make information available to unauthorized users. (CVE-2007-6207, Important)

* two buffer overflow flaws were found in ISDN subsystem. A local unprivileged user could use these flaws to cause a denial of service.
(CVE-2007-5938: Important, CVE-2007-6063: Moderate)

* a possible NULL pointer dereference was found in the subsystem used for showing CPU information, as used by CHRP systems on PowerPC architectures. This may have allowed a local unprivileged user to cause a denial of service (crash). (CVE-2007-6694, Moderate)

* a flaw was found in the handling of zombie processes. A local user could create processes that would not be properly reaped, possibly causing a denial of service. (CVE-2006-6921, Moderate)

As well, these updated packages fix the following bugs :

* a bug was found in the Linux kernel audit subsystem. When the audit daemon was setup to log the execve system call with a large number of arguments, the kernel could run out of memory, causing a kernel panic.

* on IBM System z architectures, using the IBM Hardware Management Console to toggle IBM FICON channel path ids (CHPID) caused a file ID miscompare, possibly causing data corruption.

* when running the IA-32 Execution Layer (IA-32EL) or a Java VM on Itanium architectures, a bug in the address translation in the hypervisor caused the wrong address to be registered, causing Dom0 to hang.

* on Itanium architectures, frequent Corrected Platform Error errors may have caused the hypervisor to hang.

* when enabling a CPU without hot plug support, routines for checking the presence of the CPU were missing. The CPU tried to access its own resources, causing a kernel panic.

* after updating to kernel-2.6.18-53.el5, a bug in the CCISS driver caused the HP Array Configuration Utility CLI to become unstable, possibly causing a system hang, or a kernel panic.

* a bug in NFS directory caching could have caused different hosts to have different views of NFS directories.

* on Itanium architectures, the Corrected Machine Check Interrupt masked hot-added CPUs as disabled.

* when running Oracle database software on the Intel 64 and AMD64 architectures, if an SGA larger than 4GB was created, and had hugepages allocated to it, the hugepages were not freed after database shutdown.

* in a clustered environment, when two or more NFS clients had the same logical volume mounted, and one of them modified a file on the volume, NULL characters may have been inserted, possibly causing data corruption.

These updated packages resolve several severe issues in the lpfc driver :

* a system hang after LUN discovery.

* a general fault protection, a NULL pointer dereference, or slab corruption could occur while running a debug on the kernel.

* the inability to handle kernel paging requests in 'lpfc_get_scsi_buf'.

* erroneous structure references caused certain FC discovery routines to reference and change 'lpfc_nodelist' structures, even after they were freed.

* the lpfc driver failed to interpret certain fields correctly, causing tape backup software to fail. Tape drives reported 'Illegal Request'.

* the lpfc driver did not clear structures correctly, resulting in SCSI I/Os being rejected by targets, and causing errors.

Red Hat Enterprise Linux 5 users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated icu packages that fix two security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The International Components for Unicode (ICU) library provides robust and full-featured Unicode services.

Will Drewry reported multiple flaws in the way libicu processed certain malformed regular expressions. If an application linked against ICU, such as OpenOffice.org, processed a carefully crafted regular expression, it may be possible to execute arbitrary code as the user running the application. (CVE-2007-4770, CVE-2007-4771)

All users of icu should upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated kernel packages that fix several security issues and several bugs in the Red Hat Enterprise Linux 5 kernel are now available.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

These new kernel packages fix the following security issues :

A flaw was found in the virtual filesystem (VFS). An unprivileged local user could truncate directories to which they had write permission; this could render the contents of the directory inaccessible. (CVE-2008-0001, Important)

A flaw was found in the Xen PAL emulation on Intel 64 platforms. A guest Hardware-assisted virtual machine (HVM) could read the arbitrary physical memory of the host system, which could make information available to unauthorized users. (CVE-2007-6416, Important)

A flaw was found in the way core dump files were created. If a local user can get a root-owned process to dump a core file into a directory, which the user has write access to, they could gain read access to that core file, potentially containing sensitive information. (CVE-2007-6206, Moderate)

A buffer overflow flaw was found in the CIFS virtual file system. A remote,authenticated user could issue a request that could lead to a denial of service. (CVE-2007-5904, Moderate)

A flaw was found in the 'sysfs_readdir' function. A local user could create a race condition which would cause a denial of service (kernel oops). (CVE-2007-3104, Moderate)

As well, these updated packages fix the following bugs :

* running the 'strace -f' command caused strace to hang, without displaying information about child processes.

* unmounting an unresponsive, interruptable NFS mount, for example, one mounted with the 'intr' option, may have caused a system crash.

* a bug in the s2io.ko driver prevented VLAN devices from being added.
Attempting to add a device to a VLAN, for example, running the 'vconfig add [device-name] [vlan-id]' command caused vconfig to fail.

* tux used an incorrect open flag bit. This caused problems when building packages in a chroot environment, such as mock, which is used by the koji build system.

Red Hat Enterprise Linux 5 users are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.

An updated X.Org libXfont package that fixes a security issue is now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The libXfont package contains the X.Org X11 libXfont runtime library.

A heap based buffer overflow flaw was found in the way the X.Org server handled malformed font files. A malicious local user could exploit this issue to potentially execute arbitrary code with the privileges of the X.Org server. (CVE-2008-0006)

Users of X.Org libXfont should upgrade to these updated packages, which contain a backported patch to resolve this issue.

Updated wireshark packages that fix several security issues are now available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

Wireshark is a program for monitoring network traffic. Wireshark was previously known as Ethereal.

Several flaws were found in Wireshark. Wireshark could crash or possibly execute arbitrary code as the user running Wireshark if it read a malformed packet off the network. (CVE-2007-6112, CVE-2007-6114, CVE-2007-6115, CVE-2007-6117)

Several denial of service bugs were found in Wireshark. Wireshark could crash or stop responding if it read a malformed packet off the network. (CVE-2007-6111, CVE-2007-6113, CVE-2007-6116, CVE-2007-6118, CVE-2007-6119, CVE-2007-6120, CVE-2007-6121, CVE-2007-6438, CVE-2007-6439, CVE-2007-6441, CVE-2007-6450, CVE-2007-6451)

As well, Wireshark switched from using net-snmp to libsmi, which is included in this errata.

Users of wireshark should upgrade to these updated packages, which contain Wireshark version 0.99.7, and resolve these issues.

Updated tomcat packages that fix security issues and bugs are now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

Tomcat is a servlet container for Java Servlet and JavaServer Pages technologies.

A directory traversal vulnerability existed in the Apache Tomcat webdav servlet. In some configurations it allowed remote authenticated users to read files accessible to the local tomcat process.
(CVE-2007-5461)

The default security policy in the JULI logging component did not restrict access permissions to files. This could be misused by untrusted web applications to access and write arbitrary files in the context of the tomcat process. (CVE-2007-5342)

Users of Tomcat should update to these errata packages, which contain backported patches and are not vulnerable to these issues.

Updated xorg-x11-server packages that fix several security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

[Updated 18th January 2008] The original packages distributed with this errata had a bug which could cause some X applications to fail on 32-bit platforms. We have updated the packages to correct this bug.

X.Org is an open source implementation of the X Window System. It provides basic low-level functionality that full-fledged graphical user interfaces are designed upon.

Two integer overflow flaws were found in the X.Org server's EVI and MIT-SHM modules. A malicious authorized client could exploit these issues to cause a denial of service (crash), or potentially execute arbitrary code with root privileges on the X.Org server.
(CVE-2007-6429)

A memory corruption flaw was found in the X.Org server's XInput extension. A malicious authorized client could exploit this issue to cause a denial of service (crash), or potentially execute arbitrary code with root privileges on the X.Org server. (CVE-2007-6427)

An input validation flaw was found in the X.Org server's XFree86-Misc extension. A malicious authorized client could exploit this issue to cause a denial of service (crash), or potentially execute arbitrary code with root privileges on the X.Org server. (CVE-2007-5760)

An information disclosure flaw was found in the X.Org server's TOG-CUP extension. A malicious authorized client could exploit this issue to cause a denial of service (crash), or potentially view arbitrary memory content within the X server's address space. (CVE-2007-6428)

A flaw was found in the X.Org server's XC-SECURITY extension, that could have allowed a local user to verify the existence of an arbitrary file, even in directories that are not normally accessible to that user. (CVE-2007-5958)

Users of xorg-x11-server should upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated xorg-x11 packages that fix several security issues are now available for Red Hat Enterprise Linux 4.

This update has been rated as having important security impact by the Red Hat Security Response Team.

[Updated 18th January 2008] The original packages distributed with this errata had a bug which could cause some X applications to fail on 32-bit platforms. We have updated the packages to correct this bug.

The xorg-x11 packages contain X.Org, an open source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.

Two integer overflow flaws were found in the X.Org server's EVI and MIT-SHM modules. A malicious authorized client could exploit these issues to cause a denial of service (crash), or potentially execute arbitrary code with root privileges on the X.Org server.
(CVE-2007-6429)

A heap based buffer overflow flaw was found in the way the X.Org server handled malformed font files. A malicious local user could exploit these issues to potentially execute arbitrary code with the privileges of the X.Org server. (CVE-2008-0006)

A memory corruption flaw was found in the X.Org server's XInput extension. A malicious authorized client could exploit this issue to cause a denial of service (crash), or potentially execute arbitrary code with root privileges on the X.Org server. (CVE-2007-6427)

An input validation flaw was found in the X.Org server's XFree86-Misc extension. A malicious authorized client could exploit this issue to cause a denial of service (crash), or potentially execute arbitrary code with root privileges on the X.Org server. (CVE-2007-5760)

An information disclosure flaw was found in the X.Org server's TOG-CUP extension. A malicious authorized client could exploit this issue to cause a denial of service (crash), or potentially view arbitrary memory content within the X server's address space. (CVE-2007-6428)

An integer and heap overflow flaw were found in the X.Org font server, xfs. A user with the ability to connect to the font server could have been able to cause a denial of service (crash), or potentially execute arbitrary code with the permissions of the font server.
(CVE-2007-4568, CVE-2007-4990)

A flaw was found in the X.Org server's XC-SECURITY extension, that could have allowed a local user to verify the existence of an arbitrary file, even in directories that are not normally accessible to that user. (CVE-2007-5958)

Users of xorg-x11 should upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated Apache httpd packages that fix several security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The Apache HTTP Server is a popular Web server.

A flaw was found in the mod_imagemap module. On sites where mod_imagemap was enabled and an imagemap file was publicly available, a cross-site scripting attack was possible. (CVE-2007-5000)

A flaw was found in the mod_autoindex module. On sites where directory listings are used, and the 'AddDefaultCharset' directive has been removed from the configuration, a cross-site scripting attack might have been possible against Web browsers which do not correctly derive the response character set following the rules in RFC 2616.
(CVE-2007-4465)

A flaw was found in the mod_status module. On sites where mod_status was enabled and the status pages were publicly available, a cross-site scripting attack was possible. (CVE-2007-6388)

A flaw was found in the mod_proxy_balancer module. On sites where mod_proxy_balancer was enabled, a cross-site scripting attack against an authorized user was possible. (CVE-2007-6421)

A flaw was found in the mod_proxy_balancer module. On sites where mod_proxy_balancer was enabled, an authorized user could send a carefully crafted request that would cause the Apache child process handling that request to crash. This could lead to a denial of service if using a threaded Multi-Processing Module. (CVE-2007-6422)

A flaw was found in the mod_proxy_ftp module. On sites where mod_proxy_ftp was enabled and a forward proxy was configured, a cross-site scripting attack was possible against Web browsers which do not correctly derive the response character set following the rules in RFC 2616. (CVE-2008-0005)

Users of Apache httpd should upgrade to these updated packages, which contain backported patches to resolve these issues. Users should restart httpd after installing this update.

Updated autofs packages that fix a security issue are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The autofs utility controls the operation of the automount daemon, which automatically mounts file systems when you use them, and unmounts them when you are not using them. This can include network file systems and CD-ROMs.

There was a security issue with the default configuration of autofs version 5, whereby the entry for the '-hosts' map did not specify the 'nodev' mount option. A local user with control of a remote NFS server could create special device files on the remote file system, that if mounted using the default '-hosts' map, could allow the user to access important system devices. (CVE-2007-6285)

This issue is similar to CVE-2007-5964, which fixed a missing 'nosuid' mount option in autofs. Both the 'nodev' and 'nosuid' options should be enabled to prevent a possible compromise of machine integrity.

Due to the fact that autofs always mounted '-hosts' map entries 'dev' by default, autofs has now been altered to always use the 'nodev' option when mounting from the default '-hosts' map. The 'dev' option must be explicitly given in the master map entry to revert to the old behavior. This change affects only the '-hosts' map which corresponds to the '/net' entry in the default configuration.

All autofs users are advised to upgrade to these updated packages, which resolve this issue.

Red Hat would like to thank Tim Baum for reporting this issue.

Updated libexif packages that fix several security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The libexif packages contain the Exif library. Exif is an image file format specification that enables metadata tags to be added to existing JPEG, TIFF and RIFF files. The Exif library makes it possible to parse an Exif file and read this metadata.

An infinite recursion flaw was found in the way libexif parses Exif image tags. If a victim opens a carefully crafted Exif image file, it could cause the application linked against libexif to crash.
(CVE-2007-6351)

An integer overflow flaw was found in the way libexif parses Exif image tags. If a victim opens a carefully crafted Exif image file, it could cause the application linked against libexif to execute arbitrary code, or crash. (CVE-2007-6352)

Users of libexif are advised to upgrade to these updated packages, which contain backported patches to resolve these issues.

Updated autofs packages are now available to fix a security flaw for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The autofs utility controls the operation of the automount daemon, which automatically mounts and unmounts file systems after a period of inactivity.

There was a security issue with the default installed configuration of autofs version 5 whereby the entry for the 'hosts' map did not specify the 'nosuid' mount option. A local user with control of a remote nfs server could create a setuid root executable within an exported filesystem on the remote nfs server that, if mounted using the default hosts map, would allow the user to gain root privileges.
(CVE-2007-5964)

Due to the fact that autofs always mounted hosts map entries suid by default, autofs has now been altered to always use the 'nosuid' option when mounting from the default hosts map. The 'suid' option must be explicitly given in the master map entry to revert to the old behavior. This change affects only the hosts map which corresponds to the /net entry in the default configuration.

Users are advised to upgrade to these updated autofs packages, which resolve this issue.

Red Hat would like to thank Josh Lange for reporting this issue.

Updated htdig packages that resolve a security issue are now available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The ht://Dig system is a complete World Wide Web indexing and searching system for a small domain or intranet.

A cross-site scripting flaw was discovered in a htdig search page. An attacker could construct a carefully crafted URL, which once visited by an unsuspecting user, could cause a user's Web browser to execute malicious script in the context of the visited htdig search Web page.
(CVE-2007-6110)

Users of htdig are advised to upgrade to these updated packages, which contain backported patch to resolve this issue.

Updated openoffice.org and hsqldb packages that fix security flaws are now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

OpenOffice.org is an office productivity suite. HSQLDB is a Java relational database engine used by OpenOffice.org Base.

It was discovered that HSQLDB could allow the execution of arbitrary public static Java methods. A carefully crafted odb file opened in OpenOffice.org Base could execute arbitrary commands with the permissions of the user running OpenOffice.org. (CVE-2007-4575)

It was discovered that HSQLDB did not have a password set on the 'sa' user. If HSQLDB has been configured as a service, a remote attacker who could connect to the HSQLDB port (tcp 9001) could execute arbitrary SQL commands. (CVE-2003-0845)

Note that in Red Hat Enterprise Linux 5, HSQLDB is not enabled as a service by default, and needs manual configuration in order to work as a service.

Users of OpenOffice.org or HSQLDB should update to these errata packages which contain backported patches to correct these issues.

Updated CUPS packages that fix a security issue in the Internet Printing Protocol (IPP) handling and correct some bugs are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The Common UNIX Printing System (CUPS) provides a portable printing layer for UNIX(R) operating systems.

A flaw was found in the way CUPS handles certain Internet Printing Protocol (IPP) tags. A remote attacker who is able to connect to the IPP TCP port could send a malicious request causing the CUPS daemon to crash, or potentially execute arbitrary code. Please note that the default CUPS configuration does not allow remote hosts to connect to the IPP TCP port. (CVE-2007-4351)

Red Hat would like to thank Alin Rad Pop for reporting this issue.

All CUPS users are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue.

In addition, the following bugs were fixed :

* the CUPS service has been changed to start after sshd, to avoid causing delays when logging in when the system is booted.

* the logrotate settings have been adjusted so they do not cause CUPS to reload its configuration. This is to avoid re-printing the current job, which could occur when it was a long-running job.

* a bug has been fixed in the handling of the If-Modified-Since: HTTP header.

* in the LSPP configuration, labels for labeled jobs did not line-wrap. This has been fixed.

* an access check in the LSPP configuration has been made more secure.

* the cups-lpd service no longer ignores the '-odocument-format=...' option.

* a memory allocation bug has been fixed in cupsd.

* support for UNIX domain sockets authentication without passwords has been added.

* in the LSPP configuration, a problem that could lead to cupsd crashing has been fixed.

* the error handling in the initscript has been improved.

* The job-originating-host-name attribute was not correctly set for jobs submitted via the cups-lpd service. This has been fixed.

* a problem with parsing IPv6 addresses in the configuration file has been fixed.

* a problem that could lead to cupsd crashing when it failed to open a 'file:' URI has been fixed.

Updated pcre packages that correct two security flaws are now available for Red Hat Enterprise Linux 5.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

PCRE is a Perl-compatible regular expression library.

Multiple flaws were found in the way pcre handles certain malformed regular expressions. If an application linked against pcre, such as Konqueror, parses a malicious regular expression, it may be possible to run arbitrary code as the user running the application.
(CVE-2007-1659, CVE-2007-1660)

Users of pcre are advised to upgrade to these updated packages, which contain backported patches to correct these issues.

Red Hat would like to thank Tavis Ormandy and Will Drewry for properly disclosing these issues.

Updated OpenSSL packages that correct several security issues are now available for Red Hat Enterprise 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

OpenSSL is a toolkit that implements Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library. Datagram TLS (DTLS) is a protocol based on TLS that is capable of securing datagram transport (UDP for instance).

The OpenSSL security team discovered a flaw in DTLS support. An attacker could create a malicious client or server that could trigger a heap overflow. This is possibly exploitable to run arbitrary code, but it has not been verified (CVE-2007-4995). Note that this flaw only affects applications making use of DTLS. Red Hat does not ship any DTLS client or server applications in Red Hat Enterprise Linux.

A flaw was found in the SSL_get_shared_ciphers() utility function. An attacker could send a list of ciphers to an application that used this function and overrun a buffer with a single byte (CVE-2007-5135). Few applications make use of this vulnerable function and generally it is used only when applications are compiled for debugging.

A number of possible side-channel attacks were discovered affecting OpenSSL. A local attacker could possibly obtain RSA private keys being used on a system. In practice these attacks would be difficult to perform outside of a lab environment. This update contains backported patches designed to mitigate these issues. (CVE-2007-3108).

Users of OpenSSL should upgrade to these updated packages, which contain backported patches to resolve these issues.

Please note that the fix for the DTLS flaw involved an overhaul of the DTLS handshake processing which may introduce incompatibilities if a new client is used with an older server.

After installing this update, users are advised to either restart all services that use OpenSSL or restart their system.

An updated hplip package to correct a security flaw is now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The hplip (Hewlett-Packard Linux Imaging and Printing Project) package provides drivers for HP printers and multi-function peripherals.

Kees Cook discovered a flaw in the way the hplip hpssd daemon handled user input. A local attacker could send a specially crafted request to the hpssd daemon, possibly allowing them to run arbitrary commands as the root user. (CVE-2007-5208). On Red Hat Enterprise Linux 5, the SELinux targeted policy for hpssd which is enabled by default, blocks the ability to exploit this issue to run arbitrary code.

Users of hplip are advised to upgrade to this updated package, which contains backported patches to resolve this issue.

Updated opal packages that fix a security issue are now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

Open Phone Abstraction Library (opal) is implementation of various telephony and video communication protocols for use over packet based networks.

In Red Hat Enterprise Linux 5, the Ekiga application uses opal.

A flaw was discovered in the way opal handled certain Session Initiation Protocol (SIP) packets. An attacker could use this flaw to crash an application, such as Ekiga, which is linked with opal.
(CVE-2007-4924)

Users should upgrade to these updated opal packages which contain a backported patch to correct this issue.

An updated nfs-utils-lib package to correct two security flaws is now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The nfs-utils-lib package contains support libraries that are needed by the commands and daemons of the nfs-utils package.

The updated nfs-utils package fixes the following vulnerabilities :

Tenable Network Security discovered a stack-based buffer overflow flaw in the RPC library used by nfs-utils-lib. A remote unauthenticated attacker who can access an application linked against nfs-utils-lib could trigger this flaw and cause the application to crash. On Red Hat Enterprise Linux 5 it is not possible to exploit this flaw to run arbitrary code as the overflow is blocked by FORTIFY_SOURCE.
(CVE-2007-3999)

Tony Ernst from SGI has discovered a flaw in the way nfsidmap maps NFSv4 unknown uids. If an unknown user ID is encountered on an NFSv4 mounted filesystem, the files will default to being owned by 'root' rather than 'nobody'. (CVE-2007-4135)

Users of nfs-utils-lib are advised to upgrade to this updated package, which contains backported patches to resolve these issues.

Updated kernel packages that fix various security issues in the Red Hat Enterprise Linux 5 kernel are now available.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The Linux kernel handles the basic functions of the operating system.

These new kernel packages contain fixes for the following security issues :

* A flaw was found in the backported stack unwinder fixes in Red Hat Enterprise Linux 5. On AMD64 and Intel 64 platforms, a local user could trigger this flaw and cause a denial of service. (CVE-2007-4574, Important)

* A flaw was found in the handling of process death signals. This allowed a local user to send arbitrary signals to the suid-process executed by that user. A successful exploitation of this flaw depends on the structure of the suid-program and its signal handling.
(CVE-2007-3848, Important)

* A flaw was found in the Distributed Lock Manager (DLM) in the cluster manager. This allowed a remote user who is able to connect to the DLM port to cause a denial of service. (CVE-2007-3380, Important)

* A flaw was found in the aacraid SCSI driver. This allowed a local user to make ioctl calls to the driver which should otherwise be restricted to privileged users. (CVE-2007-4308, Moderate)

* A flaw was found in the prio_tree handling of the hugetlb support that allowed a local user to cause a denial of service. This only affected kernels with hugetlb support. (CVE-2007-4133, Moderate)

* A flaw was found in the eHCA driver on PowerPC architectures that allowed a local user to access 60k of physical address space. This address space could contain sensitive information. (CVE-2007-3850, Moderate)

* A flaw was found in ptrace support that allowed a local user to cause a denial of service via a NULL pointer dereference.
(CVE-2007-3731, Moderate)

* A flaw was found in the usblcd driver that allowed a local user to cause a denial of service by writing data to the device node. To exploit this issue, write access to the device node was needed.
(CVE-2007-3513, Moderate)

* A flaw was found in the random number generator implementation that allowed a local user to cause a denial of service or possibly gain privileges. If the root user raised the default wakeup threshold over the size of the output pool, this flaw could be exploited.
(CVE-2007-3105, Low)

In addition to the security issues described above, several bug fixes preventing possible system crashes and data corruption were also included.

Red Hat Enterprise Linux 5 users are advised to upgrade to these packages, which contain backported patches to resolve these issues.

Updated pwlib packages that fix a security issue are now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

PWLib is a library used to support cross-platform applications.

In Red Hat Enterprise Linux 5, the Ekiga teleconferencing application uses PWLib.

A memory management flaw was discovered in PWLib. An attacker could use this flaw to crash an application, such as Ekiga, which is linked with pwlib (CVE-2007-4897).

Users should upgrade to these updated packages which contain a backported patch to correct this issue.

Updated krb5 packages that correct a security flaw are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

Kerberos is a network authentication system which allows clients and servers to authenticate to each other through use of symmetric encryption and a trusted third party, the KDC. kadmind is the KADM5 administration server.

The MIT Kerberos Team discovered a problem with the originally published patch for svc_auth_gss.c (CVE-2007-3999). A remote unauthenticated attacker who can access kadmind could trigger this flaw and cause kadmind to crash. On Red Hat Enterprise Linux 5 it is not possible to exploit this flaw to run arbitrary code as the overflow is blocked by FORTIFY_SOURCE. (CVE-2007-4743)

This issue did not affect the versions of Kerberos distributed with Red Hat Enterprise Linux 2.1, 3, or 4.

Users of krb5-server are advised to update to these erratum packages which contain a corrected backported fix for this issue.

Updated tomcat packages that fix several security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

Tomcat is a servlet container for Java Servlet and Java Server Pages technologies.

Tomcat was found treating single quote characters -- ' -- as delimiters in cookies. This could allow remote attackers to obtain sensitive information, such as session IDs, for session hijacking attacks (CVE-2007-3382).

It was reported Tomcat did not properly handle the following character sequence in a cookie: \' (a backslash followed by a double-quote). It was possible remote attackers could use this failure to obtain sensitive information, such as session IDs, for session hijacking attacks (CVE-2007-3385).

A cross-site scripting (XSS) vulnerability existed in the Host Manager Servlet. This allowed remote attackers to inject arbitrary HTML and web script via crafted requests (CVE-2007-3386).

Users of Tomcat should update to these erratum packages, which contain backported patches and are not vulnerable to these issues.

ID	Name	Severity
43700	CentOS 4 : kernel (CESA-2008:0607)	high
43699	CentOS 5 : firefox (CESA-2008:0597)	high
43698	CentOS 4 / 5 : bluez-libs / bluez-utils (CESA-2008:0581)	high
43697	CentOS 5 : vim (CESA-2008:0580)	high
43696	CentOS 5 : rdesktop (CESA-2008:0575)	high
43695	CentOS 5 : firefox (CESA-2008:0569)	critical
43694	CentOS 4 / 5 : ruby (CESA-2008:0561)	critical
43693	CentOS 4 : php (CESA-2008:0545)	critical
43692	CentOS 5 : kernel (CESA-2008:0519)	high
43691	CentOS 5 : evolution (CESA-2008:0514)	high
43690	CentOS 5 : xorg-x11-server (CESA-2008:0504)	critical
43689	CentOS 4 : gnutls (CESA-2008:0492)	critical
43688	CentOS 5 : gnutls (CESA-2008:0489)	critical
43687	CentOS 5 : nfs-utils (CESA-2008:0486)	high
43686	CentOS 5 : samba (CESA-2008:0290)	high
43685	CentOS 5 : kernel (CESA-2008:0275)	high
43684	CentOS 4 : gpdf (CESA-2008:0262)	medium
43683	CentOS 5 : poppler (CESA-2008:0239)	medium
43682	CentOS 4 : kernel (CESA-2008:0237)	high
43681	CentOS 5 : kernel (CESA-2008:0233)	high
43680	CentOS 4 / 5 : thunderbird (CESA-2008:0224)	high
43679	CentOS 5 : gnome-screensaver (CESA-2008:0197)	medium
43678	CentOS 5 : xen (CESA-2008:0194)	high
43677	CentOS 5 : cups (CESA-2008:0192)	critical
43676	CentOS 5 : krb5 (CESA-2008:0164)	critical
43675	CentOS 5 : dbus (CESA-2008:0159)	medium
43674	CentOS 4 / 5 : kernel (CESA-2008:0154)	high
43673	CentOS 5 : icu (CESA-2008:0090)	high
43672	CentOS 5 : kernel (CESA-2008:0089)	medium
43671	CentOS 5 : libXfont (CESA-2008:0064)	high
43670	CentOS 4 / 5 : wireshark (CESA-2008:0058)	critical
43669	CentOS 5 : tomcat (CESA-2008:0042)	medium
43668	CentOS 5 : xorg-x11-server (CESA-2008:0031)	high
43667	CentOS 4 : xorg-x11 (CESA-2008:0030)	high
43666	CentOS 5 : httpd (CESA-2008:0008)	medium
43665	CentOS 5 : autofs (CESA-2007:1176)	medium
43664	CentOS 5 : libexif (CESA-2007:1165)	medium
43663	CentOS 5 : autofs (CESA-2007:1128)	medium
43662	CentOS 4 / 5 : htdig (CESA-2007:1095)	medium
43661	CentOS 5 : openoffice.org / hsqldb (CESA-2007:1048)	high
43660	CentOS 5 : cups (CESA-2007:1020)	critical
43659	CentOS 5 : pcre (CESA-2007:0967)	medium
43658	CentOS 5 : openssl (CESA-2007:0964)	high
43657	CentOS 5 : hplip (CESA-2007:0960)	high
43656	CentOS 5 : opal (CESA-2007:0957)	medium
43655	CentOS 5 : nfs-utils-lib (CESA-2007:0951)	critical
43654	CentOS 5 : kernel (CESA-2007:0940)	medium
43653	CentOS 5 : pwlib (CESA-2007:0932)	medium
43652	CentOS 5 : krb5 (CESA-2007:0892)	critical
43651	CentOS 5 : tomcat (CESA-2007:0871)	medium

Detections

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