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USN-2137-1: Linux kernel (Saucy HWE) vulnerabilities

7 March 2014

Several security issues were fixed in the kernel.




An information leak was discovered in the Linux kernel when built with the
NetFilter Connection Tracking (NF_CONNTRACK) support for IRC protocol
(NF_NAT_IRC). A remote attacker could exploit this flaw to obtain
potentially sensitive kernel information when communicating over a client-
to-client IRC connection(/dcc) via a NAT-ed network. (CVE-2014-1690)

Matthew Thode reported a denial of service vulnerability in the Linux
kernel when SELinux support is enabled. A local user with the CAP_MAC_ADMIN
capability (and the SELinux mac_admin permission if running in enforcing
mode) could exploit this flaw to cause a denial of service (kernel crash).

An information leak was discovered in the Linux kernel's NFS filesystem. A
local users with write access to an NFS share could exploit this flaw to
obtain potential sensative information from kernel memory. (CVE-2014-2038)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

Related notices

  • USN-2158-1: linux-lts-raring, linux-image-3.8.0-38-generic
  • USN-2140-1: linux-image-3.11.0-18-generic, linux-image-3.11.0-18-generic-lpae, linux
  • USN-2138-1: linux-image-3.5.0-47-generic, linux-image-3.5.0-47-powerpc-smp, linux, linux-image-3.5.0-47-omap, linux-image-3.5.0-47-powerpc64-smp, linux-image-3.5.0-47-highbank
  • USN-2136-1: linux-lts-raring, linux-image-3.8.0-37-generic
  • USN-2129-1: linux-image-2.6.32-362-ec2, linux-ec2
  • USN-2128-1: linux-image-2.6.32-57-generic, linux-image-2.6.32-57-generic-pae, linux-image-2.6.32-57-sparc64, linux-image-2.6.32-57-sparc64-smp, linux-image-2.6.32-57-preempt, linux, linux-image-2.6.32-57-server, linux-image-2.6.32-57-virtual, linux-image-2.6.32-57-386, linux-image-2.6.32-57-ia64, linux-image-2.6.32-57-powerpc64-smp, linux-image-2.6.32-57-powerpc-smp, linux-image-2.6.32-57-powerpc, linux-image-2.6.32-57-versatile, linux-image-2.6.32-57-lpia
  • USN-2139-1: linux-ti-omap4, linux-image-3.5.0-239-omap4
  • USN-2134-1: linux-ti-omap4, linux-image-3.2.0-1444-omap4
  • USN-2135-1: linux-image-3.5.0-47-generic, linux-lts-quantal
  • USN-2133-1: linux-image-3.2.0-60-highbank, linux-image-3.2.0-60-generic-pae, linux-image-3.2.0-60-generic, linux-image-3.2.0-60-virtual, linux-image-3.2.0-60-powerpc64-smp, linux, linux-image-3.2.0-60-powerpc-smp, linux-image-3.2.0-60-omap
  • USN-2141-1: linux-ti-omap4, linux-image-3.5.0-239-omap4