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

Advisory: RHSA-2011:0500-1
Type: Security Advisory
Severity: Important
Issued on: 2011-05-10
Last updated on: 2011-05-10
Affected Products: Red Hat Enterprise MRG v1 for Red Hat Enterprise Linux (version 5)
CVEs ( CVE-2011-0695


Updated kernel-rt packages that fix multiple security issues and various
bugs are now available for Red Hat Enterprise MRG 1.3.

The Red Hat Security Response Team has rated this update as having
important 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:

* A race condition in the way the Linux kernel's InfiniBand implementation
set up new connections could allow a remote user to cause a denial of
service. (CVE-2011-0695, Important)

* An integer signedness flaw in drm_modeset_ctl() could allow a local,
unprivileged user to cause a denial of service or escalate their
privileges. (CVE-2011-1013, Important)

* A flaw in dccp_rcv_state_process() could allow a remote attacker to cause
a denial of service, even when the socket was already closed.
(CVE-2011-1093, Important)

* A missing validation of a null-terminated string data structure element
in bnep_sock_ioctl() could allow a local user to cause an information leak
or a denial of service. (CVE-2011-1079, Moderate)

* A flaw in the Linux kernel's Event Poll (epoll) implementation could
allow a local, unprivileged user to cause a denial of service.
(CVE-2011-1082, Moderate)

* A missing initialization flaw in the XFS file system implementation could
lead to an information leak. (CVE-2011-0711, Low)

* The start_code and end_code values in "/proc/[pid]/stat" were not
protected. In certain scenarios, this flaw could be used to defeat Address
Space Layout Randomization (ASLR). (CVE-2011-0726, Low)

* A missing validation check in the Linux kernel's mac_partition()
implementation, used for supporting file systems created on Mac OS
operating systems, could allow a local attacker to cause a denial of
service by mounting a disk that contains specially-crafted partitions.
(CVE-2011-1010, Low)

* A flaw in dev_load() could allow a local user who has the CAP_NET_ADMIN
capability to load arbitrary modules from "/lib/modules/", instead of only
netdev modules. (CVE-2011-1019, Low)

* A missing initialization flaw in sco_sock_getsockopt_old() could allow a
local, unprivileged user to cause an information leak. (CVE-2011-1078, Low)

* A buffer overflow flaw in the DEC Alpha OSF partition implementation in
the Linux kernel could allow a local attacker to cause an information leak
by mounting a disk that contains specially-crafted partition tables.
(CVE-2011-1163, Low)

* Missing validations of null-terminated string data structure elements
in the do_replace(), compat_do_replace(), do_ipt_get_ctl(),
do_ip6t_get_ctl(), and do_arpt_get_ctl() functions could allow a local user
who has the CAP_NET_ADMIN capability to cause an information leak.
(CVE-2011-1170, CVE-2011-1171, CVE-2011-1172, CVE-2011-1080, Low)

Red Hat would like to thank Jens Kuehnel for reporting CVE-2011-0695;
Vasiliy Kulikov for reporting CVE-2011-1079, CVE-2011-1019, CVE-2011-1078,
CVE-2011-1170, CVE-2011-1171, CVE-2011-1172, and CVE-2011-1080; Nelson
Elhage for reporting CVE-2011-1082; Dan Rosenberg for reporting
CVE-2011-0711; Kees Cook for reporting CVE-2011-0726; and Timo Warns for
reporting CVE-2011-1010 and CVE-2011-1163.

This update also fixes various bugs. Documentation for these bug fixes will
be available shortly from the Technical Notes document linked to in the
References section.

Users should upgrade to these updated packages, which upgrade the kernel-rt
kernel to version, and 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: babb6a1a451a25846ccb24aa68130702
SHA-256: 0ad8fdced84091057b7728d36db93eaf68ce44bc80c6f5ad05852e10f746854a
File outdated by:  RHBA-2013:0927
    MD5: 733e7a8eacc77889535d175e2d79892b
SHA-256: b5c4bb96d384a7cd4d50fd5999a1b6b653531f1aed388c9df563c91938361451
File outdated by:  RHBA-2013:0927
    MD5: fe6514b1021f25ad39c51bf80ff28f5c
SHA-256: 2aebee70c5860267ad1910e18dffacf6264c36394eefcf1e0d8f3d2ce14f4ce7
File outdated by:  RHBA-2013:0927
    MD5: 72019ffef45a8c8f002f0908ac467ba4
SHA-256: a3ebc5e10948e5f7780dfa02e7c53a8ff98ba655e17146f0c1167d5b7ee0f335
File outdated by:  RHBA-2013:0927
    MD5: e7144c786599bb01b3fe45c69c159c2b
SHA-256: ae149312c699db0afb0311a76c039f60e4fd10e5547d80859f43baf5218a2ce9
File outdated by:  RHBA-2013:0927
    MD5: cf8b0eee36994ee281d52c3e1ad584b4
SHA-256: 41a32b51ba482756dd82354f103a30ea0f457205f9c751a4ed2a7e40e87c1776
File outdated by:  RHBA-2013:0927
    MD5: 942b97ac5b5c1e6a3abfa4cfb6dd34f5
SHA-256: 188eb02637b1c22c0367a6cea672bf4f0a17540f6eabe80875e4c765f39b4318
File outdated by:  RHBA-2013:0927
    MD5: 22bb467f6c539c9688f31fb5c0c61d43
SHA-256: 6e972e0b42a73c504b5985ec2e3378b7b1bf0e8e869b97b45e23ed5cd55d6df0
File outdated by:  RHBA-2013:0927
    MD5: 6d3c9bc3fcf14e7ee0e2d452e85e45b3
SHA-256: cc484e15e4bcb3f96395926311feef8307432e25cacd54c4ea17e5c7da7a682d
File outdated by:  RHBA-2013:0927
    MD5: 50207ac7b913990ab24f4dbb4641b75e
SHA-256: cc1846582f7630c6bcd8cb331c3b5df0ec723a063bbb0a7a39273c2860429e54
File outdated by:  RHBA-2013:0927
    MD5: ac18ca2fb510bfcde74efa468d0134af
SHA-256: e05f586f12b6f2f06376f4136eef1908fe3807a6654d4a6ba4566c377b1e558e
File outdated by:  RHBA-2013:0927
    MD5: 0a054a1e4d5972d7cd3d15d1125dbc10
SHA-256: d169233d3a69eda4cfbeb126300af00f49ec8e797095ae3f7068c3c297076f5e
File outdated by:  RHBA-2013:0927
    MD5: 33fd892cd4ff1b9545550eae25f2df14
SHA-256: ec0e0c340b5d6e91501cd9b879a2cbfc466d847d5b591791823ef0340f91c13f
File outdated by:  RHBA-2013:0927
    MD5: cac8661ddb562e2c0c651dcbd3e681d4
SHA-256: 3a80e7451effd30248641adfa04a3089569dd3fe458f8c1718f14e58154bb57a
File outdated by:  RHBA-2013:0927
    MD5: c7f3ed3e720f0bc088f79679d32ddcde
SHA-256: e0c8050636dcf9dbf2d267e4a51182f913079929df5f01b8b9c3f3b03c68fa99
File outdated by:  RHBA-2013:0927
    MD5: cf8b0eee36994ee281d52c3e1ad584b4
SHA-256: 41a32b51ba482756dd82354f103a30ea0f457205f9c751a4ed2a7e40e87c1776
File outdated by:  RHBA-2013:0927
    MD5: 9752b667a0d7a9107bec382f35972ef3
SHA-256: 010224c405ae5a87f1eff59ea1fe2f597abdf4263c92bac057a29d27a946826c
File outdated by:  RHBA-2013:0927
    MD5: ba6b0fee80d3c91a07a478765329c83e
SHA-256: af71452ed9e4a61bbbadd6c8b9b7709b55973f86fdbed7196a7a4dd22e21c899
File outdated by:  RHBA-2013:0927
    MD5: 118dda9c23a98635f46277a040554344
SHA-256: dff00525de2d7fc606ecc7c9d2367b90db77b72b48afb822a36a7a841c02149c
File outdated by:  RHBA-2013:0927
    MD5: ecb63b990e256e215508e5bfd5359350
SHA-256: 477dea314ad979b3a64ce7198d7fce45899bec04b862a8611cb207f1aa9f6739
File outdated by:  RHBA-2013:0927
    MD5: cdbf615a326911be398293c52c86506b
SHA-256: 3ee14958e22bec35b61b935f9c89e338950e3a1aab19a1bd67bdb61e8c2c9047
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

653648 - CVE-2011-0695 kernel: panic in ib_cm:cm_work_handler
677260 - CVE-2011-0711 kernel: xfs: prevent leaking uninitialized stack memory in FSGEOMETRY_V1
679282 - CVE-2011-1010 kernel: fs/partitions: Validate map_count in Mac partition tables
679925 - CVE-2011-1013 kernel: drm_modeset_ctl signedness issue
680360 - CVE-2011-1019 kernel: CAP_SYS_MODULE bypass via CAP_NET_ADMIN
681259 - CVE-2011-1078 kernel: bt sco_conninfo infoleak
681260 - CVE-2011-1079 kernel: bnep device field missing NULL terminator
681262 - CVE-2011-1080 kernel: ebtables stack infoleak
681575 - CVE-2011-1082 kernel: potential kernel deadlock when creating circular epoll file structures
682954 - CVE-2011-1093 kernel: dccp: fix oops on Reset after close
684569 - CVE-2011-0726 kernel: proc: protect mm start_code/end_code in /proc/pid/stat
688021 - CVE-2011-1163 kernel: fs/partitions: Corrupted OSF partition table infoleak
689321 - CVE-2011-1170 ipv4: netfilter: arp_tables: fix infoleak to userspace
689327 - CVE-2011-1171 ipv4: netfilter: ip_tables: fix infoleak to userspace
689345 - CVE-2011-1172 ipv6: netfilter: ip6_tables: fix infoleak to userspace
692665 - bnx2x NICs occassionally do not come up on boot


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