Security Advisory Moderate: kernel-rt security and bug fix update

Advisory: RHSA-2010:0771-1
Type: Security Advisory
Severity: Moderate
Issued on: 2010-10-14
Last updated on: 2010-10-14
Affected Products: Red Hat Enterprise MRG v1 for Red Hat Enterprise Linux (version 5)
CVEs ( CVE-2010-0307


Updated kernel-rt packages that fix multiple security issues and upgrade
the kernel-rt kernel to version are now available for Red Hat
Enterprise MRG 1.3.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

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

This update fixes the following security issues:

* On AMD64 systems, it was discovered that the kernel did not ensure the
ELF interpreter was available before making a call to the SET_PERSONALITY
macro. A local attacker could use this flaw to cause a denial of service by
running a 32-bit application that attempts to execute a 64-bit application.
(CVE-2010-0307, Moderate)

* Information leak flaws were found in the Linux kernel Traffic Control
Unit implementation. A local attacker could use these flaws to cause the
kernel to leak kernel memory to user-space, possibly leading to the
disclosure of sensitive information. (CVE-2010-2942, Moderate)

* It was found that wireless drivers might not always clear allocated
buffers when handling a driver-specific IOCTL information request. A local
user could trigger this flaw to cause kernel memory to leak from the heap
to user-space, leading to an information leak. (CVE-2010-2955, Moderate)

* A flaw was found in the eql_g_master_cfg() function in the Linux kernel
equalizer load-balancer for serial network interfaces implementation. A
data structure in eql_g_master_cfg() was not initialized properly before
being copied to user-space. A local, unprivileged user could use this flaw
to cause an information leak. (CVE-2010-3297, Moderate)

Red Hat would like to thank Mathias Krause for reporting CVE-2010-0307, and
Dan Rosenberg for reporting CVE-2010-3297.

This update also fixes the following bugs:

* The mkinitrd utility reported the following warning message when creating
an initial ramdisk:

No module dm-mem-cache found for kernel [version], aborting.

This was caused by an erroneous dependency on dmraid-related modules. This
update removes these dependencies with the result that mkinitrd does not
issue a spurious warning about the dm-mem-cache module not being found.

* The ibm_rtl kernel module now performs more exhaustive checking to ensure
it only loads on correct IBM hardware. (BZ#612275)

* The realtime Linux kernel has been upgraded to upstream version, which provides a number of bug fixes and enhancements for
Red Hat Enterprise MRG 1.3. (BZ#638672)

Users should upgrade to these updated packages, which upgrade the kernel-rt
kernel to version to correct these issues. The system must be
rebooted for this update to take effect.


Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at

To install kernel packages manually, use "rpm -ivh [package]". Do not
use "rpm -Uvh" as that will remove the running kernel binaries from
your system. You may use "rpm -e" to remove old kernels after
determining that the new kernel functions properly on your system.

Updated packages

Red Hat Enterprise MRG v1 for Red Hat Enterprise Linux (version 5)

File outdated by:  RHBA-2013:0927
    MD5: f62b15b226b32d2d9f722480b403033e
SHA-256: bdb045840e0fded6217ded29a760f81f3d2a210acb55355383044f41d29a2690
File outdated by:  RHBA-2013:0927
    MD5: 3bd0cae4ae927dff2d235f2db96ed016
SHA-256: f649068d61b5f194f43d7c1ad227cb1de1a071ed9ed47de84c959a8e1d000ff9
File outdated by:  RHBA-2013:0927
    MD5: 10a51e25200481a1fff3231bc978541f
SHA-256: 5553b0a018dff3f08158cf1539f42e2fe87701359fa7d31a6e0ede5eea8320e8
File outdated by:  RHBA-2013:0927
    MD5: 23c1d1c02b9badd29e5adda4f8cf205c
SHA-256: 5a1515e8773e3c5857e31c5a890c297bfa9d9b7d846bff0a33e319f44c858b32
File outdated by:  RHBA-2013:0927
    MD5: 0c65e154317f34b5d5de823190ed1a02
SHA-256: 4e13d18f686a24d08c2f0fff9120b197efc4475b3e76b80e99946adaabb9c787
File outdated by:  RHBA-2013:0927
    MD5: 49b2464088f1312af31f4e91f4ba0a32
SHA-256: bf90579b369740f262d8bdf78b8248e382c813b3e2321537beeb2d15c425049f
File outdated by:  RHBA-2013:0927
    MD5: a310cea739c637b5194561dfa1336554
SHA-256: 6b945a56116cb732512ab088a4e7525c67f769c78e53ac3115fc19849bc567eb
File outdated by:  RHBA-2013:0927
    MD5: 37e0a9c68b603e695a3a677efab36ab3
SHA-256: c939b72120393e0019396aa94130b998c86efc43b2894c9ef332e5187e69cd55
File outdated by:  RHBA-2013:0927
    MD5: 99f1a002903c21c5dbef427da0ab86cb
SHA-256: b23cdd8aaf31eabb3fcebf0cf3aa4c5518bbd945c02d0745dbdd8dd2a1f358a2
File outdated by:  RHBA-2013:0927
    MD5: 6c65e56b2afb445cef4464c4059a6335
SHA-256: 611ad562b2206d9badf13e5fc06cc9b9df1446dca1132b75497573fd13156dbb
File outdated by:  RHBA-2013:0927
    MD5: 1d340e0b04974751e42dbd8e2b247570
SHA-256: a96d9c5bfef70339beb2aa8d0afe9a1dd21f1a2690b9604d32ce51e420d696bb
File outdated by:  RHBA-2013:0927
    MD5: 451df621e71cc0cd47e93331bbe59fd6
SHA-256: 0ad76ad407bc6fd357c98006d8116e03196a0013cdd20ed38339f9f67e0c0953
File outdated by:  RHBA-2013:0927
    MD5: b019662b4b87ddb79fdd30348d3ca59f
SHA-256: 4654bce8ac6f30ca52d7d443ace166069e27714e16d030b1cd1fa9850e549bc2
File outdated by:  RHBA-2013:0927
    MD5: 31cd4da75f9d0799d96420e1791b76e0
SHA-256: 899289de39521ae36539c06f581a3127360f83f4761d5fa2a0a9163d83328d54
File outdated by:  RHBA-2013:0927
    MD5: 28acfe84f4008dddd1501a4633ba680f
SHA-256: ac409d354fd840796ceeeaaa41afadaba8b47998d650ba0a07fe203ea072b2c2
File outdated by:  RHBA-2013:0927
    MD5: 49b2464088f1312af31f4e91f4ba0a32
SHA-256: bf90579b369740f262d8bdf78b8248e382c813b3e2321537beeb2d15c425049f
File outdated by:  RHBA-2013:0927
    MD5: 2115479a524efdb3f228e56614cbba44
SHA-256: 08a2e6646b4cca986f95039aff4beee313fe05d698c7a1f3a105d7ad9e5e4116
File outdated by:  RHBA-2013:0927
    MD5: 4f364a1f147f1b45c614cee81c80e76b
SHA-256: 56984eacd9755bb37e76b0db2cf81e27506fd0682fe01a74e04d95428b91d0ca
File outdated by:  RHBA-2013:0927
    MD5: fd99dac77bcedfd4e70077f80e05d5d1
SHA-256: 4946aff17dc5138c4ddcd602d5fe5b5cbe3351e1a777faea96f065ef79cb7804
File outdated by:  RHBA-2013:0927
    MD5: 75b5c5cc61828a169346c6839f990203
SHA-256: 8a25163d30c3eaf7934ed7d9531826ab60e30f4fe907d8949719de0200d0aaeb
File outdated by:  RHBA-2013:0927
    MD5: 1ffb95d01b38fac18ef5bea6281a1f7e
SHA-256: e766870cb34fed2bd3fb07b30e2ad59fea04699d3b01eb321444ba4add7782a9
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

482753 - mkinitrd erroneously inserts dependencies to dm-mem-cache (not present on MRG)
560547 - CVE-2010-0307 kernel: DoS on x86_64
612275 - WARNING: at arch/x86/mm/ioremap.c:148 __ioremap_caller+0x160/0x30e()
624903 - CVE-2010-2942 kernel: net sched: fix some kernel memory leaks
628434 - CVE-2010-2955 kernel: wireless: fix 64K kernel heap content leak via ioctl
633145 - CVE-2010-3297 kernel: drivers/net/eql.c: reading uninitialized stack memory
638672 - Need to move the MRG RT source base to upstream RT (2.6.33)


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