[LU-5238] Kernel update [RHEL6.5 2.6.32-431.20.3.el6]

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.6.0
• Affects Version/s: Lustre 2.6.0
• Severity: 3
• Assignee: Bob Glossman (Inactive)
• Reporter: Bob Glossman (Inactive)

Description

• A flaw was found in the way the Linux kernel's futex subsystem handled
  the requeuing of certain Priority Inheritance (PI) futexes. A local,
  unprivileged user could use this flaw to escalate their privileges on the
  system. (CVE-2014-3153, Important)

• A flaw was found in the way the Linux kernel's floppy driver handled user
  space provided data in certain error code paths while processing FDRAWCMD
  IOCTL commands. A local user with write access to /dev/fdX could use this
  flaw to free (using the kfree() function) arbitrary kernel memory.
  (CVE-2014-1737, Important)

• It was found that the Linux kernel's floppy driver leaked internal kernel
  memory addresses to user space during the processing of the FDRAWCMD IOCTL
  command. A local user with write access to /dev/fdX could use this flaw to
  obtain information about the kernel heap arrangement. (CVE-2014-1738, Low)

Note: A local user with write access to /dev/fdX could use these two flaws
(CVE-2014-1737 in combination with CVE-2014-1738) to escalate their
privileges on the system.

• It was discovered that the proc_ns_follow_link() function did not
  properly return the LAST_BIND value in the last pathname component as is
  expected for procfs symbolic links, which could lead to excessive freeing
  of memory and consequent slab corruption. A local, unprivileged user could
  use this flaw to crash the system. (CVE-2014-0203, Moderate)

• A flaw was found in the way the Linux kernel handled exceptions when
  user-space applications attempted to use the linkage stack. On IBM S/390
  systems, a local, unprivileged user could use this flaw to crash the
  system. (CVE-2014-2039, Moderate)

• An invalid pointer dereference flaw was found in the Marvell 8xxx
  Libertas WLAN (libertas) driver in the Linux kernel. A local user able to
  write to a file that is provided by the libertas driver and located on the
  debug file system (debugfs) could use this flaw to crash the system. Note:
  The debugfs file system must be mounted locally to exploit this issue.
  It is not mounted by default. (CVE-2013-6378, Low)

• A denial of service flaw was discovered in the way the Linux kernel's
  SELinux implementation handled files with an empty SELinux security
  context. A local user who has the CAP_MAC_ADMIN capability could use this
  flaw to crash the system. (CVE-2014-1874, Low)