The chrp_show_cpuinfo function (chrp/setup.c) in Linux kernel 2.4.21 through 2.6.18-53, when running on PowerPC, might allow local users to cause a denial of service (crash) via unknown vectors that cause the of_get_property function to fail, which triggers a NULL pointer dereference.

The remote Oracle Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2008-0154 advisory.

    [2.6.18-53.1.14.0.1.el5]
     - [NET] Add entropy support to e1000 and bnx2 (John Sobecki) [orabug      6045759]
     - [NET] Fix msi issue with kexec/kdump (Michael Chan) [orabug 6219364]
     - [MM] Fix alloc_pages_node() static `nid' race made kernel crash (Joe      Jin) [orabug 6187457]
     - [splice] Fix bad unlock_page() in error case  (Jens Axboe) [orabug      6263574]
     - [dio] fix error-path crashes (Linus Torvalds) [orabug 6242289]

     [2.6.18-53.1.14.el5]
     - merge from 2.6.18-53.1.13 to 2.6.18-53.1.12
     - [nfs] potential file corruption issue when writing (Jeff Layton ) [432078]
     - [ppc] chrp: fix possible strncmp NULL pointer usage (Vitaly Mayatskikh      ) [396821]
     - [isdn] i4l: fix memory overruns (Vitaly Mayatskikh ) [425171]
     - [isdn] fix possible isdn_net buffer overflows (Aristeu Rozanski )      [392151] {CVE-2007-6063}
     - [mm] hugepages: leak due to pagetable page sharing (Larry Woodman )      [431522]
     - [net] NULL dereference in iwl driver (Vitaly Mayatskikh ) [401421]      {CVE-2007-5938}
     - [misc] Denial of service with wedged processes (Jerome Marchand ) [221403]
     - [xen] ia64: hvm guest memory range checking (Jarod Wilson ) [408701]

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

From Red Hat Security Advisory 2008:0055 :

Updated kernel packages that fix several security issues and a bug in the Red Hat Enterprise Linux 4 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 updated kernel packages fix the following security issues :

A flaw was found in the virtual filesystem (VFS). A local unprivileged 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 implementation of ptrace. A local unprivileged user could trigger this flaw and possibly cause a denial of service (system hang). (CVE-2007-5500, Important)

A flaw was found in the way the Red Hat Enterprise Linux 4 kernel handled page faults when a CPU used the NUMA method for accessing memory on Itanium architectures. A local unprivileged user could trigger this flaw and cause a denial of service (system panic).
(CVE-2007-4130, Important)

A possible NULL pointer dereference was found in the chrp_show_cpuinfo function when using the PowerPC architecture. 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 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. This could potentially grant unauthorized access to sensitive information. (CVE-2007-6206, Moderate)

Two buffer overflow flaws were found in the Linux kernel ISDN subsystem. A local unprivileged user could use these flaws to cause a denial of service. (CVE-2007-6063, CVE-2007-6151, Moderate)

As well, these updated packages fix the following bug :

* when moving volumes that contain multiple segments, and a mirror segment is not the first in the mapping table, running the 'pvmove /dev/[device] /dev/[device]' command caused a kernel panic. A 'kernel:
Unable to handle kernel paging request at virtual address [address]' error was logged by syslog.

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

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.

These updated kernel packages fix the following security issues :

A flaw was found in the virtual filesystem (VFS). A local unprivileged 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 implementation of ptrace. A local unprivileged user could trigger this flaw and possibly cause a denial of service (system hang). (CVE-2007-5500, Important)

A flaw was found in the way the Red Hat Enterprise Linux 4 kernel handled page faults when a CPU used the NUMA method for accessing memory on Itanium architectures. A local unprivileged user could trigger this flaw and cause a denial of service (system panic).
(CVE-2007-4130, Important)

A possible NULL pointer dereference was found in the chrp_show_cpuinfo function when using the PowerPC architecture. 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 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. This could potentially grant unauthorized access to sensitive information. (CVE-2007-6206, Moderate)

Two buffer overflow flaws were found in the Linux kernel ISDN subsystem. A local unprivileged user could use these flaws to cause a denial of service. (CVE-2007-6063, CVE-2007-6151, Moderate)

As well, these updated packages fix the following bug :

  - when moving volumes that contain multiple segments, and     a mirror segment is not the first in the mapping table,     running the 'pvmove /dev/[device] /dev/[device]' command     caused a kernel panic. A 'kernel: Unable to handle     kernel paging request at virtual address [address]'     error was logged by syslog.

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.

It was discovered that the ALSA /proc interface did not write the correct number of bytes when reporting memory allocations. A local attacker might be able to access sensitive kernel memory, leading to a loss of privacy. (CVE-2007-4571)

Multiple buffer overflows were discovered in the handling of CIFS filesystems. A malicious CIFS server could cause a client system crash or possibly execute arbitrary code with kernel privileges.
(CVE-2007-5904)

It was discovered that PowerPC kernels did not correctly handle reporting certain system details. By requesting a specific set of information, a local attacker could cause a system crash resulting in a denial of service. (CVE-2007-6694)

It was discovered that some device driver fault handlers did not correctly verify memory ranges. A local attacker could exploit this to access sensitive kernel memory, possibly leading to a loss of privacy.
(CVE-2008-0007)

It was discovered that CPU resource limits could be bypassed. A malicious local user could exploit this to avoid administratively imposed resource limits. (CVE-2008-1294)

A race condition was discovered between dnotify fcntl() and close() in the kernel. If a local attacker performed malicious dnotify requests, they could cause memory consumption leading to a denial of service, or possibly send arbitrary signals to any process. (CVE-2008-1375)

On SMP systems, a race condition existed in fcntl(). Local attackers could perform malicious locks, causing system crashes and leading to a denial of service. (CVE-2008-1669).

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.

It was discovered that PowerPC kernels did not correctly handle reporting certain system details. By requesting a specific set of information, a local attacker could cause a system crash resulting in a denial of service. (CVE-2007-6694)

A race condition was discovered between dnotify fcntl() and close() in the kernel. If a local attacker performed malicious dnotify requests, they could cause memory consumption leading to a denial of service, or possibly send arbitrary signals to any process. (CVE-2008-1375)

On SMP systems, a race condition existed in fcntl(). Local attackers could perform malicious locks, causing system crashes and leading to a denial of service. (CVE-2008-1669)

The tehuti network driver did not correctly handle certain IO functions. A local attacker could perform malicious requests to the driver, potentially accessing kernel memory, leading to privilege escalation or access to private system information. (CVE-2008-1675).

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.

Several local 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-2007-6694     Cyrill Gorcunov reported a NULL pointer dereference in     code specific to the CHRP PowerPC platforms. Local users     could exploit this issue to achieve a Denial of Service     (DoS).

  - CVE-2008-0007     Nick Piggin of SuSE discovered a number of issues in     subsystems which register a fault handler for memory     mapped areas. This issue can be exploited by local users     to achieve a Denial of Service (DoS) and possibly     execute arbitrary code.

  - CVE-2008-1294     David Peer discovered that users could escape     administrator imposed cpu time limitations (RLIMIT_CPU)     by setting a limit of 0.

  - CVE-2008-1375     Alexander Viro discovered a race condition in the     directory notification subsystem that allows local users     to cause a Denial of Service (oops) and possibly result     in an escalation of privileges.

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-2006-5823     LMH reported a potential local DoS which could be     exploited by a malicious user with the privileges to     mount and read a corrupted cramfs filesystem.

  - CVE-2006-6054     LMH reported a potential local DoS which could be     exploited by a malicious user with the privileges to     mount and read a corrupted ext2 filesystem.

  - CVE-2006-6058     LMH reported an issue in the minix filesystem that     allows local users with mount privileges to create a DoS     (printk flood) by mounting a specially crafted corrupt     filesystem.

  - CVE-2006-7203     OpenVZ Linux kernel team reported an issue in the smbfs     filesystem which can be exploited by local users to     cause a DoS (oops) during mount.

  - CVE-2007-1353     Ilja van Sprundel discovered that kernel memory could be     leaked via the Bluetooth setsockopt call due to an     uninitialized stack buffer. This could be used by local     attackers to read the contents of sensitive kernel     memory.

  - CVE-2007-2172     Thomas Graf reported a typo in the DECnet protocol     handler that could be used by a local attacker to     overrun an array via crafted packets, potentially     resulting in a Denial of Service (system crash). A     similar issue exists in the IPV4 protocol handler and     will be fixed in a subsequent update.

  - CVE-2007-2525     Florian Zumbiehl discovered a memory leak in the PPPOE     subsystem caused by releasing a socket before     PPPIOCGCHAN is called upon it. This could be used by a     local user to DoS a system by consuming all available     memory.

  - CVE-2007-3105     The PaX Team discovered a potential buffer overflow in     the random number generator which may permit local users     to cause a denial of service or gain additional     privileges. This issue is not believed to effect default     Debian installations where only root has sufficient     privileges to exploit it.

  - CVE-2007-3739     Adam Litke reported a potential local denial of service     (oops) on powerpc platforms resulting from unchecked VMA     expansion into address space reserved for hugetlb pages.

  - CVE-2007-3740     Steve French reported that CIFS filesystems with     CAP_UNIX enabled were not honoring a process' umask     which may lead to unintentionally relaxed permissions.

  - CVE-2007-3848     Wojciech Purczynski discovered that pdeath_signal was     not being reset properly under certain conditions which     may allow local users to gain privileges by sending     arbitrary signals to suid binaries.

  - CVE-2007-4133     Hugh Dickins discovered a potential local DoS (panic) in     hugetlbfs. A misconversion of hugetlb_vmtruncate_list to     prio_tree may allow local users to trigger a BUG_ON()     call in exit_mmap.

  - CVE-2007-4308     Alan Cox reported an issue in the aacraid driver that     allows unprivileged local users to make ioctl calls     which should be restricted to admin privileges.

  - CVE-2007-4573     Wojciech Purczynski discovered a vulnerability that can     be exploited by a local user to obtain superuser     privileges on x86_64 systems. This resulted from     improper clearing of the high bits of registers during     ia32 system call emulation. This vulnerability is     relevant to the Debian amd64 port as well as users of     the i386 port who run the amd64 linux-image flavour.

  - CVE-2007-5093     Alex Smith discovered an issue with the pwc driver for     certain webcam devices. If the device is removed while a     userspace application has it open, the driver will wait     for userspace to close the device, resulting in a     blocked USB subsystem. This issue is of low security     impact as it requires the attacker to either have     physical access to the system or to convince a user with     local access to remove the device on their behalf.

  - CVE-2007-6063     Venustech AD-LAB discovered a a buffer overflow in the     isdn ioctl handling, exploitable by a local user.

  - CVE-2007-6151     ADLAB discovered a possible memory overrun in the ISDN     subsystem that may permit a local user to overwrite     kernel memory by issuing ioctls with unterminated data.

  - CVE-2007-6206     Blake Frantz discovered that when a core file owned by a     non-root user exists, and a root-owned process dumps     core over it, the core file retains its original     ownership. This could be used by a local user to gain     access to sensitive information.

  - CVE-2007-6694     Cyrill Gorcunov reported a NULL pointer dereference in     code specific to the CHRP PowerPC platforms. Local users     could exploit this issue to achieve a Denial of Service     (DoS).

  - CVE-2008-0007     Nick Piggin of SuSE discovered a number of issues in     subsystems which register a fault handler for memory     mapped areas. This issue can be exploited by local users     to achieve a Denial of Service (DoS) and possibly     execute arbitrary code.

The following matrix lists additional packages that were rebuilt for compatibility with or to take advantage of this update :

                             Debian 3.1 (sarge)            kernel-image-2.6.8-alpha    2.6.8-17sarge1                kernel-image-2.6.8-amd64    2.6.8-17sarge1                kernel-image-2.6.8-hppa     2.6.8-7sarge1                 kernel-image-2.6.8-i386     2.6.8-17sarge1                kernel-image-2.6.8-ia64     2.6.8-15sarge1                kernel-image-2.6.8-m68k     2.6.8-5sarge1                 kernel-image-2.6.8-s390     2.6.8-6sarge1                 kernel-image-2.6.8-sparc    2.6.8-16sarge1                kernel-patch-powerpc-2.6.8  2.6.8-13sarge1                fai-kernels                 1.9.1sarge8

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-2004-2731     infamous41md reported multiple integer overflows in the     Sbus PROM driver that would allow for a DoS (Denial of     Service) attack by a local user, and possibly the     execution of arbitrary code.

  - CVE-2006-4814     Doug Chapman discovered a potential local DoS (deadlock)     in the mincore function caused by improper lock     handling.

  - CVE-2006-5753     Eric Sandeen provided a fix for a local memory     corruption vulnerability resulting from a     misinterpretation of return values when operating on     inodes which have been marked bad.

  - CVE-2006-5823     LMH reported a potential local DoS which could be     exploited by a malicious user with the privileges to     mount and read a corrupted cramfs filesystem.

  - CVE-2006-6053     LMH reported a potential local DoS which could be     exploited by a malicious user with the privileges to     mount and read a corrupted ext3 filesystem.

  - CVE-2006-6054     LMH reported a potential local DoS which could be     exploited by a malicious user with the privileges to     mount and read a corrupted ext2 filesystem.

  - CVE-2006-6106     Marcel Holtman discovered multiple buffer overflows in     the Bluetooth subsystem which can be used to trigger a     remote DoS (crash) and potentially execute arbitrary     code.

  - CVE-2007-1353     Ilja van Sprundel discovered that kernel memory could be     leaked via the Bluetooth setsockopt call due to an     uninitialized stack buffer. This could be used by local     attackers to read the contents of sensitive kernel     memory.

  - CVE-2007-1592     Masayuki Nakagawa discovered that flow labels were     inadvertently being shared between listening sockets and     child sockets. This defect can be exploited by local     users to cause a DoS (Oops).

  - CVE-2007-2172     Thomas Graf reported a typo in the DECnet protocol     handler that could be used by a local attacker to     overrun an array via crafted packets, potentially     resulting in a Denial of Service (system crash). A     similar issue exists in the IPV4 protocol handler and     will be fixed in a subsequent update.

  - CVE-2007-2525     Florian Zumbiehl discovered a memory leak in the PPPOE     subsystem caused by releasing a socket before     PPPIOCGCHAN is called upon it. This could be used by a     local user to DoS a system by consuming all available     memory.

  - CVE-2007-3848     Wojciech Purczynski discovered that pdeath_signal was     not being reset properly under certain conditions which     may allow local users to gain privileges by sending     arbitrary signals to suid binaries.

  - CVE-2007-4308     Alan Cox reported an issue in the aacraid driver that     allows unprivileged local users to make ioctl calls     which should be restricted to admin privileges.

  - CVE-2007-4311     PaX team discovered an issue in the random driver where     a defect in the reseeding code leads to a reduction in     entropy.

  - CVE-2007-5093     Alex Smith discovered an issue with the pwc driver for     certain webcam devices. If the device is removed while a     userspace application has it open, the driver will wait     for userspace to close the device, resulting in a     blocked USB subsystem. This issue is of low security     impact as it requires the attacker to either have     physical access to the system or to convince a user with     local access to remove the device on their behalf.

  - CVE-2007-6063     Venustech AD-LAB discovered a a buffer overflow in the     isdn ioctl handling, exploitable by a local user.

  - CVE-2007-6151     ADLAB discovered a possible memory overrun in the ISDN     subsystem that may permit a local user to overwrite     kernel memory by issuing ioctls with unterminated data.

  - CVE-2007-6206     Blake Frantz discovered that when a core file owned by a     non-root user exists, and a root-owned process dumps     core over it, the core file retains its original     ownership. This could be used by a local user to gain     access to sensitive information.

  - CVE-2007-6694     Cyrill Gorcunov reported a NULL pointer dereference in     code specific to the CHRP PowerPC platforms. Local users     could exploit this issue to achieve a Denial of Service     (DoS).

  - CVE-2008-0007     Nick Piggin of SuSE discovered a number of issues in     subsystems which register a fault handler for memory     mapped areas. This issue can be exploited by local users     to achieve a Denial of Service (DoS) and possibly     execute arbitrary code.

The following matrix lists additional packages that were rebuilt for compatibility with or to take advantage of this update :

                              Debian 3.1 (sarge)             alsa-modules-i386            1.0.8+2sarge2                  kernel-image-2.4.27-arm      2.4.27-2sarge6                 kernel-image-2.4.27-m68k     2.4.27-3sarge6                 kernel-image-speakup-i386    2.4.27-1.1sarge5               kernel-image-2.4.27-alpha    2.4.27-10sarge6                kernel-image-2.4.27-s390     2.4.27-2sarge6                 kernel-image-2.4.27-sparc    2.4.27-9sarge6                 kernel-image-2.4.27-i386     2.4.27-10sarge6                kernel-image-2.4.27-ia64     2.4.27-10sarge6                kernel-patch-2.4.27-mips     2.4.27-10.sarge4.040815-3      kernel-patch-powerpc-2.4.27  2.4.27-10sarge6                kernel-latest-2.4-alpha      101sarge3                      kernel-latest-2.4-i386       101sarge2                      kernel-latest-2.4-s390       2.4.27-1sarge2                 kernel-latest-2.4-sparc      42sarge3                       i2c                          1:2.9.1-1sarge2                lm-sensors                   1:2.9.1-1sarge4                mindi-kernel                 2.4.27-2sarge5                 pcmcia-modules-2.4.27-i386   3.2.5+2sarge2                  hostap-modules-i386          1:0.3.7-1sarge3                systemimager                 3.2.3-6sarge5

Updated kernel packages that fix several security issues and a bug in the Red Hat Enterprise Linux 4 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 updated kernel packages fix the following security issues :

A flaw was found in the virtual filesystem (VFS). A local unprivileged 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 implementation of ptrace. A local unprivileged user could trigger this flaw and possibly cause a denial of service (system hang). (CVE-2007-5500, Important)

A flaw was found in the way the Red Hat Enterprise Linux 4 kernel handled page faults when a CPU used the NUMA method for accessing memory on Itanium architectures. A local unprivileged user could trigger this flaw and cause a denial of service (system panic).
(CVE-2007-4130, Important)

A possible NULL pointer dereference was found in the chrp_show_cpuinfo function when using the PowerPC architecture. 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 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. This could potentially grant unauthorized access to sensitive information. (CVE-2007-6206, Moderate)

Two buffer overflow flaws were found in the Linux kernel ISDN subsystem. A local unprivileged user could use these flaws to cause a denial of service. (CVE-2007-6063, CVE-2007-6151, Moderate)

As well, these updated packages fix the following bug :

* when moving volumes that contain multiple segments, and a mirror segment is not the first in the mapping table, running the 'pvmove /dev/[device] /dev/[device]' command caused a kernel panic. A 'kernel:
Unable to handle kernel paging request at virtual address [address]' error was logged by syslog.

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

ID	Name	Product	Family	Severity
67659	Oracle Linux 5 : Important: / kernel (ELSA-2008-0154)	Nessus	Oracle Linux Local Security Checks	high
67641	Oracle Linux 4 : kernel (ELSA-2008-0055)	Nessus	Oracle Linux Local Security Checks	high
60370	Scientific Linux Security Update : kernel on SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	high
60354	Scientific Linux Security Update : kernel on SL4.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	high
43674	CentOS 4 / 5 : kernel (CESA-2008:0154)	Nessus	CentOS Local Security Checks	high
33255	Ubuntu 6.06 LTS / 7.04 / 7.10 : linux-source-2.6.15/20/22 vulnerabilities (USN-618-1)	Nessus	Ubuntu Local Security Checks	high
33093	Ubuntu 8.04 LTS : linux vulnerabilities (USN-614-1)	Nessus	Ubuntu Local Security Checks	high
32127	Debian DSA-1565-1 : linux-2.6 - several vulnerabilities	Nessus	Debian Local Security Checks	high
31388	RHEL 5 : kernel (RHSA-2008:0154)	Nessus	Red Hat Local Security Checks	high
31148	Debian DSA-1504-1 : kernel-source-2.6.8 - several vulnerabilities	Nessus	Debian Local Security Checks	high
31147	Debian DSA-1503-1 : kernel-source-2.4.27 - several vulnerabilities	Nessus	Debian Local Security Checks	high
30154	CentOS 4 : kernel (CESA-2008:0055)	Nessus	CentOS Local Security Checks	high
30140	RHEL 4 : kernel (RHSA-2008:0055)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2007-6694

medium

Tenable Plugins

high

high

high

high

high

high

high

high

high

high

high

high

high