Updated kernel packages that resolve several security issues and fix various 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.

* Olaf Kirch reported a flaw in the i915 kernel driver. This flaw could, potentially, lead to local privilege escalation. Note: the flaw only affects systems based on the Intel G33 Express Chipset and newer.
(CVE-2008-3831, Important)

* Miklos Szeredi reported a missing check for files opened with O_APPEND in the sys_splice(). This could allow a local, unprivileged user to bypass the append-only file restrictions. (CVE-2008-4554, Important)

* a deficiency was found in the Linux kernel Stream Control Transmission Protocol (SCTP) implementation. This could lead to a possible denial of service if one end of a SCTP connection did not support the AUTH extension. (CVE-2008-4576, Important)

In addition, these updated packages fix the following bugs :

* on Itanium(r) systems, when a multithreaded program was traced using the command 'strace -f', messages such as

PANIC: attached pid 10740 exited PANIC: handle_group_exit: 10740 leader 10721 ...

will be displayed, and after which the trace would stop. With these updated packages, 'strace -f' command no longer results in these error messages, and strace terminates normally after tracing all threads.

* on big-endian systems such as PowerPC, the getsockopt() function incorrectly returned 0 depending on the parameters passed to it when the time to live (TTL) value equaled 255.

* when using an NFSv4 file system, accessing the same file with two separate processes simultaneously resulted in the NFS client process becoming unresponsive.

* on AMD64 and Intel(r) 64 hypervisor-enabled systems, when a syscall correctly returned '-1' in code compiled on Red Hat Enterprise Linux 5, the same code, when run with the strace utility, would incorrectly return an invalid return value. This has been fixed: on AMD64 and Intel(r) 64 hypervisor-enabled systems, syscalls in compiled code return the same, correct values as syscalls run with strace.

* on the Itanium(r) architecture, fully-virtualized guest domains created using more than 64 GB of memory caused other guest domains not to receive interrupts. This caused soft lockups on other guests. All guest domains are now able to receive interrupts regardless of their allotted memory.

* when user-space used SIGIO notification, which was not disabled before closing a file descriptor and was then re-enabled in a different process, an attempt by the kernel to dereference a stale pointer led to a kernel crash. With this fix, such a situation no longer causes a kernel crash.

* modifications to certain pages made through a memory-mapped region could have been lost in cases when the NFS client needed to invalidate the page cache for that particular memory-mapped file.

* fully-virtualized Windows(r) guests became unresponsive due to the vIOSAPIC component being multiprocessor-unsafe. With this fix, vIOSAPIC is multiprocessor-safe and Windows guests do not become unresponsive.

* on certain systems, keyboard controllers could not withstand continuous requests to switch keyboard LEDs on or off. This resulted in some or all key presses not being registered by the system.

* on the Itanium(r) architecture, setting the 'vm.nr_hugepages' sysctl parameter caused a kernel stack overflow resulting in a kernel panic, and possibly stack corruption. With this fix, setting vm.nr_hugepages works correctly.

* hugepages allow the Linux kernel to utilize the multiple page size capabilities of modern hardware architectures. In certain configurations, systems with large amounts of memory could fail to allocate most of this memory for hugepages even if it was free. This could result, for example, in database restart failures.

Users should upgrade to these updated packages, which contain backported patches to correct these issues.

The openSUSE 10.3 kernel was update to 2.6.22.19. This includes bugs and security fixes.

CVE-2008-4576: Fixed a crash in SCTP INIT-ACK, on mismatch between SCTP AUTH availability. This might be exploited remotely for a denial of service (crash) attack.

CVE-2008-3528: The ext[234] filesystem code fails to properly handle corrupted data structures. With a mounted filesystem image or partition that have corrupted dir->i_size and dir->i_blocks, a user performing either a read or write operation on the mounted image or partition can lead to a possible denial of service by spamming the logfile.

CVE-2007-6716: fs/direct-io.c in the dio subsystem in the Linux kernel did not properly zero out the dio struct, which allows local users to cause a denial of service (OOPS), as demonstrated by a certain fio test.

CVE-2008-3525: Added missing capability checks in sbni_ioctl().

CVE-2008-3272: Fixed range checking in the snd_seq OSS ioctl, which could be used to leak information from the kernel.

CVE-2008-3276: An integer overflow flaw was found in the Linux kernel dccp_setsockopt_change() function. An attacker may leverage this vulnerability to trigger a kernel panic on a victim's machine remotely.

CVE-2008-1673: Added range checking in ASN.1 handling for the CIFS and SNMP NAT netfilter modules.

CVE-2008-2826: A integer overflow in SCTP was fixed, which might have been used by remote attackers to crash the machine or potentially execute code.

CVE-2008-2812: Various NULL ptr checks have been added to tty op functions, which might have been used by local attackers to execute code. We think that this affects only devices openable by root, so the impact is limited.

- Olaf Kirch reported a flaw in the i915 kernel driver     that only affects the Intel G33 series and newer. This     flaw could, potentially, lead to local privilege     escalation. (CVE-2008-3831, Important)

  - Miklos Szeredi reported a missing check for files opened     with O_APPEND in the sys_splice(). This could allow a     local, unprivileged user to bypass the append-only file     restrictions. (CVE-2008-4554, Important)

  - a deficiency was found in the Linux kernel Stream     Control Transmission Protocol (SCTP) implementation.
    This could lead to a possible denial of service if one     end of a SCTP connection did not support the AUTH     extension. (CVE-2008-4576, Important)

In addition, these updated packages fix the following bugs :

  - on Itanium&reg; systems, when a multithreaded program     was traced using the command 'strace -f', messages     similar to the following ones were displayed, after     which the trace would stop :

    PANIC: attached pid 10740 exited PANIC:
    handle_group_exit: 10740 leader 10721 PANIC: attached     pid 10739 exited PANIC: handle_group_exit: 10739 leader     10721 ...

In these updated packages, tracing a multithreaded program using the 'strace -f' command no longer results in these error messages, and strace terminates normally after tracing all threads.

  - on big-endian systems such as PowerPC, the getsockopt()     function incorrectly returned 0 depending on the     parameters passed to it when the time to live (TTL)     value equaled 255.

  - when using an NFSv4 file system, accessing the same file     with two separate processes simultaneously resulted in     the NFS client process becoming unresponsive.

  - on AMD64 and Intel&reg; 64 hypervisor-enabled systems,     in cases in which a syscall correctly returned '-1' in     code compiled on Red Hat Enterprise Linux 5, the same     code, when run with the strace utility, would     incorrectly return an invalid return value. This has     been fixed so that on AMD64 and Intel&reg; 64     hypervisor-enabled systems, syscalls in compiled code     return the same, correct values as syscalls do when run     with strace.

  - on the Itanium&reg; architecture, fully-virtualized     guest domains which were created using more than 64 GB     of memory caused other guest domains not to receive     interrupts, which caused a soft lockup on other guests.
    All guest domains are now able to receive interrupts     regardless of their allotted memory.

  - when user-space used SIGIO notification, which wasn't     disabled before closing a file descriptor, and was then     re-enabled in a different process, an attempt by the     kernel to dereference a stale pointer led to a kernel     crash. With this fix, such a situation no longer causes     a kernel crash.

  - modifications to certain pages made through a     memory-mapped region could have been lost in cases when     the NFS client needed to invalidate the page cache for     that particular memory-mapped file.

  - fully-virtualized Windows guests became unresponsive due     to the vIOSAPIC component being multiprocessor-unsafe.
    With this fix, vIOSAPIC is multiprocessor-safe and     Windows guests do not become unresponsive.

  - on certain systems, keyboard controllers were not able     to withstand a continuous flow of requests to switch     keyboard LEDs on or off, which resulted in some or all     key presses not being registered by the system.

  - on the Itanium&reg; architecture, setting the     'vm.nr_hugepages' sysctl parameter caused a kernel stack     overflow resulting in a kernel panic, and possibly stack     corruption. With this fix, setting vm.nr_hugepages works     correctly.

  - hugepages allow the Linux kernel to utilize the multiple     page size capabilities of modern hardware architectures.
    In certain configurations, systems with large amounts of     memory could fail to allocate most of memory for     hugepages even if it was free, which could have     resulted, for example, in database restart failures.

This kernel update fixes various bugs and also several security issues :

CVE-2008-4576: Fixed a crash in SCTP INIT-ACK, on mismatch between SCTP AUTH availability. This might be exploited remotely for a denial of service (crash) attack.

CVE-2008-3833: The generic_file_splice_write function in fs/splice.c in the Linux kernel does not properly strip setuid and setgid bits when there is a write to a file, which allows local users to gain the privileges of a different group, and obtain sensitive information or possibly have unspecified other impact, by splicing into an inode in order to create an executable file in a setgid directory.

CVE-2008-4210: fs/open.c in the Linux kernel before 2.6.22 does not properly strip setuid and setgid bits when there is a write to a file, which allows local users to gain the privileges of a different group, and obtain sensitive information or possibly have unspecified other impact, by creating an executable file in a setgid directory through the (1) truncate or (2) ftruncate function in conjunction with memory-mapped I/O.

CVE-2008-4302: fs/splice.c in the splice subsystem in the Linux kernel before 2.6.22.2 does not properly handle a failure of the add_to_page_cache_lru function, and subsequently attempts to unlock a page that was not locked, which allows local users to cause a denial of service (kernel BUG and system crash), as demonstrated by the fio I/O tool.

CVE-2008-3528: The ext[234] filesystem code fails to properly handle corrupted data structures. With a mounted filesystem image or partition that have corrupted dir->i_size and dir->i_blocks, a user performing either a read or write operation on the mounted image or partition can lead to a possible denial of service by spamming the logfile.

CVE-2007-6716: fs/direct-io.c in the dio subsystem in the Linux kernel did not properly zero out the dio struct, which allows local users to cause a denial of service (OOPS), as demonstrated by a certain fio test.

CVE-2008-3525: Added missing capability checks in sbni_ioctl().

CVE-2008-3272: Fixed range checking in the snd_seq OSS ioctl, which could be used to leak information from the kernel.

CVE-2008-2931: The do_change_type function in fs/namespace.c did not verify that the caller has the CAP_SYS_ADMIN capability, which allows local users to gain privileges or cause a denial of service by modifying the properties of a mountpoint.

CVE-2008-2812: Various NULL ptr checks have been added to tty op functions, which might have been used by local attackers to execute code. We think that this affects only devices openable by root, so the impact is limited.

CVE-2008-1673: Added range checking in ASN.1 handling for the CIFS and SNMP NAT netfilter modules.

CVE-2008-3527: arch/i386/kernel/sysenter.c in the Virtual Dynamic Shared Objects (vDSO) implementation in the Linux kernel before 2.6.21 did not properly check boundaries, which allows local users to gain privileges or cause a denial of service via unspecified vectors, related to the install_special_mapping, syscall, and syscall32_nopage functions.

Update kernel from version 2.6.26.5 to 2.6.26.6:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.26.6 CVE-2008-3831 An IOCTL in the i915 driver was not properly restricted to users with the proper capabilities to use it. CVE-2008-4410 The vmi_write_ldt_entry function in arch/x86/kernel/vmi_32.c in the Virtual Machine Interface (VMI) in the Linux kernel 2.6.26.5 invokes write_idt_entry where write_ldt_entry was intended, which allows local users to cause a denial of service (persistent application failure) via crafted function calls, related to the Java Runtime Environment (JRE) experiencing improper LDT selector state, a different vulnerability than CVE-2008-3247. CVE-2008-3525 The sbni_ioctl function in drivers/net/wan/sbni.c in the wan subsystem in the Linux kernel 2.6.26.3 does not check for the CAP_NET_ADMIN capability before processing a (1) SIOCDEVRESINSTATS, (2) SIOCDEVSHWSTATE, (3) SIOCDEVENSLAVE, or (4) SIOCDEVEMANSIPATE ioctl request, which allows local users to bypass intended capability restrictions. CVE-2008-4554 The do_splice_from function in fs/splice.c in the Linux kernel before 2.6.27 does not reject file descriptors that have the O_APPEND flag set, which allows local users to bypass append mode and make arbitrary changes to other locations in the file. CVE-2008-4576 sctp in Linux kernel before 2.6.25.18 allows remote attackers to cause a denial of service (OOPS) via an INIT-ACK that states the peer does not support AUTH, which causes the sctp_process_init function to clean up active transports and triggers the OOPS when the T1-Init timer expires. Also fixes these bugs reported against Fedora 9: 465873 - kernel build-id note corruption 466303 - IPSec kernel lockup. 464613 - 11143 unconditional linker option arch/powerpc/lib/crtsavres.o causes external module buildfailure 463034 - [sata_nv swncq] kernel 2.6.26.3-29 raid errors: 'md: super_written gets error=-5, uptodate=0' 460550 - Insert key does not work on console since 2.6.26 438606 - at76 stops working with port to mac80211 466511 - Kernel crash when using openswan 462919 - kernel 2.6.26.3-19.fc9.x86_64 TT-budget C-1500 DVB card is not longer working 462178 - PCMCIA CF adaptor causes kernel hang at 'Starting UDEV:'

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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

  - CVE-2008-3527     Tavis Ormandy reported a local DoS and potential     privilege escalation in the Virtual Dynamic Shared     Objects (vDSO) implementation.

  - CVE-2008-3528     Eugene Teo reported a local DoS issue in the ext2 and     ext3 filesystems. Local users who have been granted the     privileges necessary to mount a filesystem would be able     to craft a corrupted filesystem that causes the kernel     to output error messages in an infinite loop.

  - CVE-2008-4554     Milos Szeredi reported that the usage of splice() on     files opened with O_APPEND allows users to write to the     file at arbitrary offsets, enabling a bypass of possible     assumed semantics of the O_APPEND flag.

  - CVE-2008-4576     Vlad Yasevich reported an issue in the SCTP subsystem     that may allow remote users to cause a local DoS by     triggering a kernel oops.

  - CVE-2008-4933     Eric Sesterhenn reported a local DoS issue in the     hfsplus filesystem. Local users who have been granted     the privileges necessary to mount a filesystem would be     able to craft a corrupted filesystem that causes the     kernel to overrun a buffer, resulting in a system oops     or memory corruption.

  - CVE-2008-4934     Eric Sesterhenn reported a local DoS issue in the     hfsplus filesystem. Local users who have been granted     the privileges necessary to mount a filesystem would be     able to craft a corrupted filesystem that results in a     kernel oops due to an unchecked return value.

  - CVE-2008-5025     Eric Sesterhenn reported a local DoS issue in the hfs     filesystem. Local users who have been granted the     privileges necessary to mount a filesystem would be able     to craft a filesystem with a corrupted catalog name     length, resulting in a system oops or memory corruption.

  - CVE-2008-5029     Andrea Bittau reported a DoS issue in the unix socket     subsystem that allows a local user to cause memory     corruption, resulting in a kernel panic.

  - CVE-2008-5079     Hugo Dias reported a DoS condition in the ATM subsystem     that can be triggered by a local user by calling the     svc_listen function twice on the same socket and reading     /proc/net/atm/*vc.

  - CVE-2008-5182     Al Viro reported race conditions in the inotify     subsystem that may allow local users to acquire elevated     privileges.

  - CVE-2008-5300     Dann Frazier reported a DoS condition that allows local     users to cause the out of memory handler to kill off     privileged processes or trigger soft lockups due to a     starvation issue in the unix socket subsystem.

It was discovered that the Xen hypervisor block driver did not correctly validate requests. A user with root privileges in a guest OS could make a malicious IO request with a large number of blocks that would crash the host OS, leading to a denial of service. This only affected Ubuntu 7.10. (CVE-2007-5498)

It was discovered the the i915 video driver did not correctly validate memory addresses. A local attacker could exploit this to remap memory that could cause a system crash, leading to a denial of service. This issue did not affect Ubuntu 6.06 and was previous fixed for Ubuntu 7.10 and 8.04 in USN-659-1. Ubuntu 8.10 has now been corrected as well. (CVE-2008-3831)

David Watson discovered that the kernel did not correctly strip permissions when creating files in setgid directories. A local user could exploit this to gain additional group privileges. This issue only affected Ubuntu 6.06. (CVE-2008-4210)

Olaf Kirch and Miklos Szeredi discovered that the Linux kernel did not correctly reject the 'append' flag when handling file splice requests.
A local attacker could bypass append mode and make changes to arbitrary locations in a file. This issue only affected Ubuntu 7.10 and 8.04. (CVE-2008-4554)

It was discovered that the SCTP stack did not correctly handle INIT-ACK. A remote user could exploit this by sending specially crafted SCTP traffic which would trigger a crash in the system, leading to a denial of service. This issue did not affect Ubuntu 8.10.
(CVE-2008-4576)

It was discovered that the SCTP stack did not correctly handle bad packet lengths. A remote user could exploit this by sending specially crafted SCTP traffic which would trigger a crash in the system, leading to a denial of service. This issue did not affect Ubuntu 8.10.
(CVE-2008-4618)

Eric Sesterhenn discovered multiple flaws in the HFS+ filesystem. If a local user or automated system were tricked into mounting a malicious HFS+ filesystem, the system could crash, leading to a denial of service. (CVE-2008-4933, CVE-2008-4934, CVE-2008-5025)

It was discovered that the Unix Socket handler did not correctly process the SCM_RIGHTS message. A local attacker could make a malicious socket request that would crash the system, leading to a denial of service. (CVE-2008-5029)

It was discovered that the driver for simple i2c audio interfaces did not correctly validate certain function pointers. A local user could exploit this to gain root privileges or crash the system, leading to a denial of service. (CVE-2008-5033).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

From Red Hat Security Advisory 2008:1017 :

Updated kernel packages that resolve several security issues and fix various 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.

* Olaf Kirch reported a flaw in the i915 kernel driver. This flaw could, potentially, lead to local privilege escalation. Note: the flaw only affects systems based on the Intel G33 Express Chipset and newer.
(CVE-2008-3831, Important)

* Miklos Szeredi reported a missing check for files opened with O_APPEND in the sys_splice(). This could allow a local, unprivileged user to bypass the append-only file restrictions. (CVE-2008-4554, Important)

* a deficiency was found in the Linux kernel Stream Control Transmission Protocol (SCTP) implementation. This could lead to a possible denial of service if one end of a SCTP connection did not support the AUTH extension. (CVE-2008-4576, Important)

In addition, these updated packages fix the following bugs :

* on Itanium(r) systems, when a multithreaded program was traced using the command 'strace -f', messages such as

PANIC: attached pid 10740 exited PANIC: handle_group_exit: 10740 leader 10721 ...

will be displayed, and after which the trace would stop. With these updated packages, 'strace -f' command no longer results in these error messages, and strace terminates normally after tracing all threads.

* on big-endian systems such as PowerPC, the getsockopt() function incorrectly returned 0 depending on the parameters passed to it when the time to live (TTL) value equaled 255.

* when using an NFSv4 file system, accessing the same file with two separate processes simultaneously resulted in the NFS client process becoming unresponsive.

* on AMD64 and Intel(r) 64 hypervisor-enabled systems, when a syscall correctly returned '-1' in code compiled on Red Hat Enterprise Linux 5, the same code, when run with the strace utility, would incorrectly return an invalid return value. This has been fixed: on AMD64 and Intel(r) 64 hypervisor-enabled systems, syscalls in compiled code return the same, correct values as syscalls run with strace.

* on the Itanium(r) architecture, fully-virtualized guest domains created using more than 64 GB of memory caused other guest domains not to receive interrupts. This caused soft lockups on other guests. All guest domains are now able to receive interrupts regardless of their allotted memory.

* when user-space used SIGIO notification, which was not disabled before closing a file descriptor and was then re-enabled in a different process, an attempt by the kernel to dereference a stale pointer led to a kernel crash. With this fix, such a situation no longer causes a kernel crash.

* modifications to certain pages made through a memory-mapped region could have been lost in cases when the NFS client needed to invalidate the page cache for that particular memory-mapped file.

* fully-virtualized Windows(r) guests became unresponsive due to the vIOSAPIC component being multiprocessor-unsafe. With this fix, vIOSAPIC is multiprocessor-safe and Windows guests do not become unresponsive.

* on certain systems, keyboard controllers could not withstand continuous requests to switch keyboard LEDs on or off. This resulted in some or all key presses not being registered by the system.

* on the Itanium(r) architecture, setting the 'vm.nr_hugepages' sysctl parameter caused a kernel stack overflow resulting in a kernel panic, and possibly stack corruption. With this fix, setting vm.nr_hugepages works correctly.

* hugepages allow the Linux kernel to utilize the multiple page size capabilities of modern hardware architectures. In certain configurations, systems with large amounts of memory could fail to allocate most of this memory for hugepages even if it was free. This could result, for example, in database restart failures.

Users should upgrade to these updated packages, which contain backported patches to correct these issues.

This patch updates the openSUSE 11.0 kernel to the 2.6.25.18 stable release.

It also includes bugfixes and security fixes :

CVE-2008-4410: The vmi_write_ldt_entry function in arch/x86/kernel/vmi_32.c in the Virtual Machine Interface (VMI) in the Linux kernel 2.6.26.5 invokes write_idt_entry where write_ldt_entry was intended, which allows local users to cause a denial of service (persistent application failure) via crafted function calls, related to the Java Runtime Environment (JRE) experiencing improper LDT selector state.

sctp: Fix kernel panic while process protocol violation parameter.

CVE-2008-3528: The ext[234] filesystem code fails to properly handle corrupted data structures. With a mounted filesystem image or partition that have corrupted dir->i_size and dir->i_blocks, a user performing either a read or write operation on the mounted image or partition can lead to a possible denial of service by spamming the logfile.

CVE-2008-3526: Integer overflow in the sctp_setsockopt_auth_key function in net/sctp/socket.c in the Stream Control Transmission Protocol (sctp) implementation in the Linux kernel allows remote attackers to cause a denial of service (panic) or possibly have unspecified other impact via a crafted sca_keylength field associated with the SCTP_AUTH_KEY option.

CVE-2008-3525: Added missing capability checks in sbni_ioctl().

CVE-2008-4576: SCTP in Linux kernel before 2.6.25.18 allows remote attackers to cause a denial of service (OOPS) via an INIT-ACK that states the peer does not support AUTH, which causes the sctp_process_init function to clean up active transports and triggers the OOPS when the T1-Init timer expires.

CVE-2008-4445: The sctp_auth_ep_set_hmacs function in net/sctp/auth.c in the Stream Control Transmission Protocol (sctp) implementation in the Linux kernel before 2.6.26.4, when the SCTP-AUTH extension is enabled, does not verify that the identifier index is within the bounds established by SCTP_AUTH_HMAC_ID_MAX, which allows local users to obtain sensitive information via a crafted SCTP_HMAC_IDENT IOCTL request involving the sctp_getsockopt function.

CVE-2008-3792: net/sctp/socket.c in the Stream Control Transmission Protocol (sctp) implementation in the Linux kernel 2.6.26.3 does not verify that the SCTP-AUTH extension is enabled before proceeding with SCTP-AUTH API functions, which allows attackers to cause a denial of service (panic) via vectors that result in calls to (1) sctp_setsockopt_auth_chunk, (2) sctp_setsockopt_hmac_ident, (3) sctp_setsockopt_auth_key, (4) sctp_setsockopt_active_key, (5) sctp_setsockopt_del_key, (6) sctp_getsockopt_maxburst, (7) sctp_getsockopt_active_key, (8) sctp_getsockopt_peer_auth_chunks, or (9) sctp_getsockopt_local_auth_chunks.

CVE-2008-4113: The sctp_getsockopt_hmac_ident function in net/sctp/socket.c in the Stream Control Transmission Protocol (sctp) implementation in the Linux kernel before 2.6.26.4, when the SCTP-AUTH extension is enabled, relies on an untrusted length value to limit copying of data from kernel memory, which allows local users to obtain sensitive information via a crafted SCTP_HMAC_IDENT IOCTL request involving the sctp_getsockopt function.

CVE-2008-3911: The proc_do_xprt function in net/sunrpc/sysctl.c in the Linux kernel 2.6.26.3 does not check the length of a certain buffer obtained from userspace, which allows local users to overflow a stack-based buffer and have unspecified other impact via a crafted read system call for the /proc/sys/sunrpc/transports file.

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

  - CVE-2008-3528     Eugene Teo reported a local DoS issue in the ext2 and     ext3 filesystems. Local users who have been granted the     privileges necessary to mount a filesystem would be able     to craft a corrupted filesystem that causes the kernel     to output error messages in an infinite loop.

  - CVE-2008-4554     Milos Szeredi reported that the usage of splice() on     files opened with O_APPEND allows users to write to the     file at arbitrary offsets, enabling a bypass of possible     assumed semantics of the O_APPEND flag.

  - CVE-2008-4576     Vlad Yasevich reported an issue in the SCTP subsystem     that may allow remote users to cause a local DoS by     triggering a kernel oops.

  - CVE-2008-4618     Wei Yongjun reported an issue in the SCTP subsystem that     may allow remote users to cause a local DoS by     triggering a kernel panic.

  - CVE-2008-4933     Eric Sesterhenn reported a local DoS issue in the     hfsplus filesystem. Local users who have been granted     the privileges necessary to mount a filesystem would be     able to craft a corrupted filesystem that causes the     kernel to overrun a buffer, resulting in a system oops     or memory corruption.

  - CVE-2008-4934     Eric Sesterhenn reported a local DoS issue in the     hfsplus filesystem. Local users who have been granted     the privileges necessary to mount a filesystem would be     able to craft a corrupted filesystem that results in a     kernel oops due to an unchecked return value.

  - CVE-2008-5025     Eric Sesterhenn reported a local DoS issue in the hfs     filesystem. Local users who have been granted the     privileges necessary to mount a filesystem would be able     to craft a filesystem with a corrupted catalog name     length, resulting in a system oops or memory corruption.

  - CVE-2008-5029     Andrea Bittau reported a DoS issue in the unix socket     subsystem that allows a local user to cause memory     corruption, resulting in a kernel panic.

  - CVE-2008-5134     Johannes Berg reported a remote DoS issue in the     libertas wireless driver, which can be triggered by a     specially crafted beacon/probe response.

  - CVE-2008-5182     Al Viro reported race conditions in the inotify     subsystem that may allow local users to acquire elevated     privileges.

  - CVE-2008-5300     Dann Frazier reported a DoS condition that allows local     users to cause the out of memory handler to kill off     privileged processes or trigger soft lockups due to a     starvation issue in the unix socket subsystem.

Update kernel from version 2.6.26.5 to 2.6.26.6:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.26.6 CVE-2008-3831 An IOCTL in the i915 driver was not properly restricted to users with the proper capabilities to use it. CVE-2008-4410 The vmi_write_ldt_entry function in arch/x86/kernel/vmi_32.c in the Virtual Machine Interface (VMI) in the Linux kernel 2.6.26.5 invokes write_idt_entry where write_ldt_entry was intended, which allows local users to cause a denial of service (persistent application failure) via crafted function calls, related to the Java Runtime Environment (JRE) experiencing improper LDT selector state, a different vulnerability than CVE-2008-3247. CVE-2008-3525 The sbni_ioctl function in drivers/net/wan/sbni.c in the wan subsystem in the Linux kernel 2.6.26.3 does not check for the CAP_NET_ADMIN capability before processing a (1) SIOCDEVRESINSTATS, (2) SIOCDEVSHWSTATE, (3) SIOCDEVENSLAVE, or (4) SIOCDEVEMANSIPATE ioctl request, which allows local users to bypass intended capability restrictions. CVE-2008-4554 The do_splice_from function in fs/splice.c in the Linux kernel before 2.6.27 does not reject file descriptors that have the O_APPEND flag set, which allows local users to bypass append mode and make arbitrary changes to other locations in the file. CVE-2008-4576 sctp in Linux kernel before 2.6.25.18 allows remote attackers to cause a denial of service (OOPS) via an INIT-ACK that states the peer does not support AUTH, which causes the sctp_process_init function to clean up active transports and triggers the OOPS when the T1-Init timer expires.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2008-1017.

ID	Name	Product	Family	Published	Updated	Severity
43719	CentOS 5 : kernel (CESA-2008:1017)	Nessus	CentOS Local Security Checks	1/6/2010	1/4/2021	high
35179	RHEL 5 : kernel (RHSA-2008:1017)	Nessus	Red Hat Local Security Checks	12/16/2008	1/14/2021	high
34457	openSUSE 10 Security Update : kernel (kernel-5700)	Nessus	SuSE Local Security Checks	10/21/2008	1/14/2021	critical
60508	Scientific Linux Security Update : kernel on SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	8/1/2012	1/14/2021	high
34755	openSUSE 10 Security Update : kernel (kernel-5751)	Nessus	SuSE Local Security Checks	11/12/2008	1/14/2021	critical
34481	Fedora 8 : kernel-2.6.26.6-49.fc8 (2008-8980)	Nessus	Fedora Local Security Checks	10/24/2008	1/11/2021	high
35174	Debian DSA-1687-1 : linux-2.6 - denial of service/privilege escalation	Nessus	Debian Local Security Checks	12/16/2008	1/4/2021	high
37683	Ubuntu 6.06 LTS / 7.10 / 8.04 LTS / 8.10 : linux, linux-source-2.6.15/22 vulnerabilities (USN-679-1)	Nessus	Ubuntu Local Security Checks	4/23/2009	1/19/2021	high
67772	Oracle Linux 5 : kernel (ELSA-2008-1017)	Nessus	Oracle Linux Local Security Checks	7/12/2013	8/24/2021	high
40010	openSUSE Security Update : kernel (kernel-270)	Nessus	SuSE Local Security Checks	7/21/2009	1/14/2021	high
35036	Debian DSA-1681-1 : linux-2.6.24 - denial of service/privilege escalation	Nessus	Debian Local Security Checks	12/5/2008	1/4/2021	critical
34480	Fedora 9 : kernel-2.6.26.6-79.fc9 (2008-8929)	Nessus	Fedora Local Security Checks	10/24/2008	1/11/2021	high
801461	CentOS RHSA-2008-1017 Security Check	Log Correlation Engine	Generic			high

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