Synopsis

Important: kernel security and bug fix update

Type/Severity

Security Advisory: Important

Topic

Updated kernel packages that fix multiple security issues and two bugs are
now available for Red Hat Enterprise Linux 6.2 Advanced Update Support.

Red Hat Product Security 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.

Description

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

• A flaw was found in the way the Linux kernel's SCTP implementation
  validated INIT chunks when performing Address Configuration Change
  (ASCONF). A remote attacker could use this flaw to crash the system by
  sending a specially crafted SCTP packet to trigger a NULL pointer
  dereference on the system. (CVE-2014-7841, Important)
  
• It was found that the Linux kernel's Infiniband subsystem did not
  properly sanitize input parameters while registering memory regions from
  user space via the (u)verbs API. A local user with access to a
  /dev/infiniband/uverbsX device could use this flaw to crash the system or,
  potentially, escalate their privileges on the system. (CVE-2014-8159,
  Important)
  
• An integer overflow flaw was found in the way the Linux kernel's Frame
  Buffer device implementation mapped kernel memory to user space via the
  mmap syscall. A local user able to access a frame buffer device file
  (/dev/fb*) could possibly use this flaw to escalate their privileges on the
  system. (CVE-2013-2596, Important)
  
• It was found that the parse_rock_ridge_inode_internal() function of the
  Linux kernel's ISOFS implementation did not correctly check relocated
  directories when processing Rock Ridge child link (CL) tags. An attacker
  with physical access to the system could use a specially crafted ISO image
  to crash the system or, potentially, escalate their privileges on the
  system. (CVE-2014-5471, CVE-2014-5472, Low)
  

Red Hat would like to thank Mellanox for reporting the CVE-2014-8159 issue.
The CVE-2014-7841 issue was discovered by Liu Wei of Red Hat.

This update also fixes the following bugs:

• Previously, certain network device drivers did not accept ethtool
  commands right after they were loaded. As a consequence, the current
  setting of the specified device driver was not applied and an error message
  was returned. The ETHTOOL_DELAY variable has been added, which makes sure
  the ethtool utility waits for some time before it tries to apply the
  options settings, thus fixing the bug. (BZ#1138299)
  
• During the memory allocation for a new socket to communicate to the
  server, the rpciod daemon released a clean page which needed to be
  committed. However, the commit was queueing indefinitely as the commit
  could only be provided with a socket connection. As a consequence, a
  deadlock occurred in rpciod. This update sets the PF_FSTRANS flag on the
  work queue task prior to the socket allocation, and adds the
  nfs_release_page check for the flag when deciding whether to make a commit
  call, thus fixing this bug. (BZ#1192326)
  

All kernel users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. The system must be
rebooted for this update to take effect.

Solution

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

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server - AUS 6.2 x86_64

Fixes

• BZ - 1034490 - CVE-2013-2596 kernel: integer overflow in fb_mmap
• BZ - 1134099 - CVE-2014-5471 CVE-2014-5472 kernel: isofs: unbound recursion when processing relocated directories
• BZ - 1163087 - CVE-2014-7841 kernel: net: sctp: NULL pointer dereference in af->from_addr_param on malformed packet
• BZ - 1181166 - CVE-2014-8159 kernel: infiniband: uverbs: unprotected physical memory access

CVEs

• CVE-2014-5472
• CVE-2014-5471
• CVE-2013-2596
• CVE-2014-7841
• CVE-2014-8159

References

• https://access.redhat.com/security/updates/classification/#important

Red Hat Enterprise Linux Server - AUS 6.2

SRPM
kernel-2.6.32-220.60.2.el6.src.rpm	SHA-256: 2d30422470e9ba2f577895e747f90be736af0b21ae53e9de299549964e3efe19
x86_64
kernel-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: d0f78fe66cc2dae3dcd04816ea1f0af2f4e925a00197b03e2df548c4ce9f1bbf
kernel-debug-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 0c85e4a37955fc27ea229c153dfec73da342e9bb5f553909d0ee60dd53fa74fa
kernel-debug-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 8f71e67d8b39b7fc0227d774558fa6dab5cbf6c5d791b16837bddca0e81a1d0e
kernel-debug-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 8f71e67d8b39b7fc0227d774558fa6dab5cbf6c5d791b16837bddca0e81a1d0e
kernel-debug-devel-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 6ee25fdeee6bde2df81a2177128e56a5c18d65471d4699388b51f693380bd560
kernel-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 958540abc121c206fc29b6a8c5b15c272c7ef9e56ea8d4a36896ff5b572a5f0a
kernel-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 958540abc121c206fc29b6a8c5b15c272c7ef9e56ea8d4a36896ff5b572a5f0a
kernel-debuginfo-common-x86_64-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 67c59fa64896abf969383cfa54ed3703d9462aea9152832c572a830febe329a6
kernel-debuginfo-common-x86_64-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 67c59fa64896abf969383cfa54ed3703d9462aea9152832c572a830febe329a6
kernel-devel-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 2671c77fad2e3bd5d11f394099afb8b1635cbb933b67f95554bafaf35d374150
kernel-doc-2.6.32-220.60.2.el6.noarch.rpm	SHA-256: ec89df1a33ab84c4717c0b52f475db2511d6561d351be6bd1dc4374772cb0e76
kernel-firmware-2.6.32-220.60.2.el6.noarch.rpm	SHA-256: f40a151c56967f007d025f7ba4e345211c351ea9eeb2d414fa66686e30fffa0e
kernel-headers-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 8fbbd90aba694ce62d949e941182af0306ac93abe7ab3e43f02780c270236783
perf-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 3aa3ca66e9ff59f0c33c79e1ba88357fdbd7c1394ad80db7dc258427b90e5871
perf-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 5c7729e9bb9e4220ee9b2a20d3b46aac1dcc87f3a9a1245de2d0ee8a02aeb1ad
perf-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 5c7729e9bb9e4220ee9b2a20d3b46aac1dcc87f3a9a1245de2d0ee8a02aeb1ad
python-perf-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 0d69aa5eba2c9041a4ead05437b55a5b794bab7524059e32c4c72266fac1a388
python-perf-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 115c0ef7c0aca7f218e9a94526d9defe85b7e9283b41ece74d08740093751b0b
python-perf-debuginfo-2.6.32-220.60.2.el6.x86_64.rpm	SHA-256: 115c0ef7c0aca7f218e9a94526d9defe85b7e9283b41ece74d08740093751b0b