The xattr file system code, as backported in Red Hat Enterprise Linux 3 on 64-bit systems, does not properly handle certain offsets, which allows local users to cause a denial of service (system crash) via certain actions on an ext3 file system with extended attributes enabled.

Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2004-2302     A race condition in the sysfs filesystem allows local     users to read kernel memory and cause a denial of     service (crash).

  - CVE-2005-0756     Alexander Nyberg discovered that the ptrace() system     call does not properly verify addresses on the amd64     architecture which can be exploited by a local attacker     to crash the kernel.

  - CVE-2005-0757     A problem in the offset handling in the xattr file     system code for ext3 has been discovered that may allow     users on 64-bit systems that have access to an ext3     filesystem with extended attributes to cause the kernel     to crash.

  - CVE-2005-1265     Chris Wright discovered that the mmap() function could     create illegal memory maps that could be exploited by a     local user to crash the kernel or potentially execute     arbitrary code.

  - CVE-2005-1761     A vulnerability on the IA-64 architecture can lead local     attackers to overwrite kernel memory and crash the     kernel.

  - CVE-2005-1762     A vulnerability has been discovered in the ptrace()     system call on the amd64 architecture that allows a     local attacker to cause the kernel to crash.

  - CVE-2005-1763     A buffer overflow in the ptrace system call for 64-bit     architectures allows local users to write bytes into     arbitrary kernel memory.

  - CVE-2005-1765     Zou Nan Hai has discovered that a local user could cause     the kernel to hang on the amd64 architecture after     invoking syscall() with specially crafted arguments.

  - CVE-2005-1767     A vulnerability has been discovered in the stack segment     fault handler that could allow a local attacker to cause     a stack exception that will lead the kernel to crash     under certain circumstances.

  - CVE-2005-2456     Balazs Scheidler discovered that a local attacker could     call setsockopt() with an invalid xfrm_user policy     message which would cause the kernel to write beyond the     boundaries of an array and crash.

  - CVE-2005-2458     Vladimir Volovich discovered a bug in the zlib routines     which are also present in the Linux kernel and allows     remote attackers to crash the kernel.

  - CVE-2005-2459     Another vulnerability has been discovered in the zlib     routines which are also present in the Linux kernel and     allows remote attackers to crash the kernel.

  - CVE-2005-2548     Peter Sandstrom noticed that snmpwalk from a remote host     could cause a denial of service (kernel oops from null     dereference) via certain UDP packets that lead to a     function call with the wrong argument.

  - CVE-2005-2801     Andreas Gruenbacher discovered a bug in the ext2 and     ext3 file systems. When data areas are to be shared     among two inodes not all information were compared for     equality, which could expose wrong ACLs for files.

  - CVE-2005-2872     Chad Walstrom discovered that the ipt_recent kernel     module on 64-bit processors such as AMD64 allows remote     attackers to cause a denial of service (kernel panic)     via certain attacks such as SSH brute force.

  - CVE-2005-3105     The mprotect code on Itanium IA-64 Montecito processors     does not properly maintain cache coherency as required     by the architecture, which allows local users to cause a     denial of service and possibly corrupt data by modifying     PTE protections.

  - CVE-2005-3106     A race condition in the thread management may allow     local users to cause a denial of service (deadlock) when     threads are sharing memory and waiting for a thread that     has just performed an exec.

  - CVE-2005-3107     When one thread is tracing another thread that shares     the same memory map a local user could cause a denial of     service (deadlock) by forcing a core dump when the     traced thread is in the TASK_TRACED state.

  - CVE-2005-3108     A bug in the ioremap() system call has been discovered     on the amd64 architecture that could allow local users     to cause a denial of service or an information leak when     performing a lookup of a non-existent memory page.

  - CVE-2005-3109     The HFS and HFS+ (hfsplus) modules allow local attackers     to cause a denial of service (oops) by using hfsplus to     mount a filesystem that is not hfsplus.

  - CVE-2005-3110     A race condition in the ebtables netfilter module on an     SMP system running under high load may allow remote     attackers to cause a denial of service (crash).

  - CVE-2005-3271     Roland McGrath discovered that exec() does not properly     clear posix-timers in multi-threaded environments, which     results in a resource leak and could allow a large     number of multiple local users to cause a denial of     service by using more posix-timers than specified by the     quota for a single user.

  - CVE-2005-3272     The kernel allows remote attackers to poison the bridge     forwarding table using frames that have already been     dropped by filtering, which can cause the bridge to     forward spoofed packets.

  - CVE-2005-3273     The ioctl for the packet radio ROSE protocol does not     properly verify the arguments when setting a new router,     which allows attackers to trigger out-of-bounds errors.

  - CVE-2005-3274     A race condition on SMP systems allows local users to     cause a denial of service (null dereference) by causing     a connection timer to expire while the connection table     is being flushed before the appropriate lock is     acquired.

  - CVE-2005-3275     An error in the NAT code allows remote attackers to     cause a denial of service (memory corruption) by causing     two packets for the same protocol to be NATed at the     same time, which leads to memory corruption.

  - CVE-2005-3276     A missing memory cleanup in the thread handling routines     before copying data into userspace allows a user process     to obtain sensitive information.

This update also contains a number of corrections for issues that turned out to have no security implication afterwards.

Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2005-0756     Alexander Nyberg discovered that the ptrace() system     call does not properly verify addresses on the amd64     architecture which can be exploited by a local attacker     to crash the kernel.

  - CVE-2005-0757     A problem in the offset handling in the xattr file     system code for ext3 has been discovered that may allow     users on 64-bit systems that have access to an ext3     filesystem with extended attributes to cause the kernel     to crash.

  - CVE-2005-1762     A vulnerability has been discovered in the ptrace()     system call on the amd64 architecture that allows a     local attacker to cause the kernel to crash.

  - CVE-2005-1767     A vulnerability has been discovered in the stack segment     fault handler that could allow a local attacker to cause     a stack exception that will lead the kernel to crash     under certain circumstances.

  - CVE-2005-1768     Ilja van Sprundel discovered a race condition in the     IA32 (x86) compatibility execve() systemcall for amd64     and IA64 that allows local attackers to cause the kernel     to panic and possibly execute arbitrary code.

  - CVE-2005-2456     Balazs Scheidler discovered that a local attacker could     call setsockopt() with an invalid xfrm_user policy     message which would cause the kernel to write beyond the     boundaries of an array and crash.

  - CVE-2005-2458     Vladimir Volovich discovered a bug in the zlib routines     which are also present in the Linux kernel and allows     remote attackers to crash the kernel.

  - CVE-2005-2459     Another vulnerability has been discovered in the zlib     routines which are also present in the Linux kernel and     allows remote attackers to crash the kernel.

  - CVE-2005-2553     A NULL pointer dereference in ptrace when tracing a     64-bit executable can cause the kernel to crash.

  - CVE-2005-2801     Andreas Gruenbacher discovered a bug in the ext2 and     ext3 file systems. When data areas are to be shared     among two inodes not all information were compared for     equality, which could expose wrong ACLs for files.

  - CVE-2005-2872     Chad Walstrom discovered that the ipt_recent kernel     module to stop SSH bruteforce attacks could cause the     kernel to crash on 64-bit architectures.

  - CVE-2005-3275     An error in the NAT code allows remote attackers to     cause a denial of service (memory corruption) by causing     two packets for the same protocol to be NATed at the     same time, which leads to memory corruption.

Updated kernel packages are now available as part of ongoing support and maintenance of Red Hat Enterprise Linux version 3. This is the fifth regular update.

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

This is the fifth regular kernel update to Red Hat Enterprise Linux 3.

New features introduced by this update include :

  - support for 2-TB partitions on block devices - support     for new disk, network, and USB devices - support for     clustered APIC mode on AMD64 NUMA systems - netdump     support on AMD64, Intel EM64T, Itanium, and ppc64     systems - diskdump support on sym53c8xx and SATA     piix/promise adapters - NMI switch support on AMD64 and     Intel EM64T systems

There were many bug fixes in various parts of the kernel. The ongoing effort to resolve these problems has resulted in a marked improvement in the reliability and scalability of Red Hat Enterprise Linux 3.

Some key areas affected by these fixes include the kernel's networking, SATA, TTY, and USB subsystems, as well as the architecture-dependent handling under the ia64, ppc64, and x86_64 directories. Scalability improvements were made primarily in the memory management and file system areas.

A flaw in offset handling in the xattr file system code backported to Red Hat Enterprise Linux 3 was fixed. On 64-bit systems, a user who can access an ext3 extended-attribute-enabled file system could cause a denial of service (system crash). This issue is rated as having a moderate security impact (CVE-2005-0757).

The following device drivers have been upgraded to new versions :

3c59x ------ LK1.1.18 3w-9xxx ---- 2.24.00.011fw (new in Update 5) 3w-xxxx ---- 1.02.00.037 8139too ---- (upstream 2.4.29) b44 -------- 0.95 cciss ------ v2.4.54.RH1 e100 ------- 3.3.6-k2 e1000 ------ 5.6.10.1-k2 lpfcdfc ---- 1.0.13 (new in Update 5) tg3 -------- 3.22RH

Note: The kernel-unsupported package contains various drivers and modules that are unsupported and therefore might contain security problems that have not been addressed.

All Red Hat Enterprise Linux 3 users are advised to upgrade their kernels to the packages associated with their machine architectures and configurations as listed in this erratum.

Updated kernel packages are now available as part of ongoing support
and maintenance of Red Hat Enterprise Linux version 3. This is the
fifth regular update.

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

This is the fifth regular kernel update to Red Hat Enterprise Linux 3.

New features introduced by this update include :

  - support for 2-TB partitions on block devices - support
    for new disk, network, and USB devices - support for
    clustered APIC mode on AMD64 NUMA systems - netdump
    support on AMD64, Intel EM64T, Itanium, and ppc64
    systems - diskdump support on sym53c8xx and SATA
    piix/promise adapters - NMI switch support on AMD64 and
    Intel EM64T systems

There were many bug fixes in various parts of the kernel. The ongoing
effort to resolve these problems has resulted in a marked improvement
in the reliability and scalability of Red Hat Enterprise Linux 3.

Some key areas affected by these fixes include the kernel's
networking, SATA, TTY, and USB subsystems, as well as the
architecture-dependent handling under the ia64, ppc64, and x86_64
directories. Scalability improvements were made primarily in the
memory management and file system areas.

A flaw in offset handling in the xattr file system code backported to
Red Hat Enterprise Linux 3 was fixed. On 64-bit systems, a user who
can access an ext3 extended-attribute-enabled file system could cause
a denial of service (system crash). This issue is rated as having a
moderate security impact (CVE-2005-0757).

The following device drivers have been upgraded to new versions :

3c59x ------ LK1.1.18 3w-9xxx ---- 2.24.00.011fw (new in Update 5)
3w-xxxx ---- 1.02.00.037 8139too ---- (upstream 2.4.29) b44 --------
0.95 cciss ------ v2.4.54.RH1 e100 ------- 3.3.6-k2 e1000 ------
5.6.10.1-k2 lpfcdfc ---- 1.0.13 (new in Update 5) tg3 -------- 3.22RH

Note: The kernel-unsupported package contains various drivers and
modules that are unsupported and therefore might contain security
problems that have not been addressed.

All Red Hat Enterprise Linux 3 users are advised to upgrade their
kernels to the packages associated with their machine architectures
and configurations as listed in this erratum.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2005-294.

ID	Name	Product	Family	Severity
22788	Debian DSA-922-1 : kernel-source-2.6.8 - several vulnerabilities	Nessus	Debian Local Security Checks	high
22787	Debian DSA-921-1 : kernel-source-2.4.27 - several vulnerabilities	Nessus	Debian Local Security Checks	medium
21801	CentOS 3 : kernel (CESA-2005:294)	Nessus	CentOS Local Security Checks	low
18313	RHEL 3 : kernel (RHSA-2005:294)	Nessus	Red Hat Local Security Checks	low
801609	Red Hat 2005-294 Security Check	Log Correlation Engine	Generic	high
801402	CentOS RHSA-2005-294 Security Check	Log Correlation Engine	Generic	high

Detections

Analytics

CVE-2005-0757

medium

Tenable Plugins

high

medium

low

low

high

high