USN-1386-1: Linux kernel (Natty backport) vulnerabilities

06 March 2012

Several security issues were fixed in the kernel.

Releases

Packages

  • linux-lts-backport-natty - Linux kernel backport from Natty

Details

The linux kernel did not properly account for PTE pages when deciding which
task to kill in out of memory conditions. A local, unprivileged could
exploit this flaw to cause a denial of service. (CVE-2011-2498)

A flaw was discovered in the TOMOYO LSM's handling of mount system calls.
An unprivileged user could oops the system causing a denial of service.
(CVE-2011-2518)

Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user
who can mount a FUSE file system could cause a denial of service.
(CVE-2011-3353)

A bug was discovered in the Linux kernel's calculation of OOM (Out of
memory) scores, that would result in the wrong process being killed. A user
could use this to kill the process with the highest OOM score, even if that
process belongs to another user or the system. (CVE-2011-4097)

A flaw was found in KVM's Programmable Interval Timer (PIT). When a virtual
interrupt control is not available a local user could use this to cause a
denial of service by starting a timer. (CVE-2011-4622)

A flaw was discovered in the XFS filesystem. If a local user mounts a
specially crafted XFS image it could potential execute arbitrary code on
the system. (CVE-2012-0038)

Chen Haogang discovered an integer overflow that could result in memory
corruption. A local unprivileged user could use this to crash the system.
(CVE-2012-0044)

A flaw was found in the linux kernels IPv4 IGMP query processing. A remote
attacker could exploit this to cause a denial of service. (CVE-2012-0207)

Update instructions

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

Ubuntu 10.04

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-1336-1: linux, linux-image-3.0.0-15-server, linux-image-3.0.0-15-powerpc, linux-image-3.0.0-15-powerpc64-smp, linux-image-3.0.0-15-virtual, linux-image-3.0.0-15-powerpc-smp, linux-image-3.0.0-15-generic, linux-image-3.0.0-15-omap, linux-image-3.0.0-15-generic-pae
  • USN-1391-1: linux-mvl-dove, linux-image-2.6.32-423-dove
  • USN-1556-1: linux-ec2, linux-image-2.6.32-347-ec2
  • USN-1389-1: linux-image-2.6.32-39-sparc64, linux-image-2.6.32-39-powerpc-smp, linux-image-2.6.32-39-generic-pae, linux-image-2.6.32-39-lpia, linux-image-2.6.32-39-386, linux-image-2.6.32-39-sparc64-smp, linux-image-2.6.32-39-virtual, linux-image-2.6.32-39-ia64, linux, linux-image-2.6.32-39-powerpc64-smp, linux-image-2.6.32-39-powerpc, linux-image-2.6.32-39-generic, linux-image-2.6.32-39-versatile, linux-image-2.6.32-39-preempt, linux-image-2.6.32-39-server
  • USN-1330-1: linux-ti-omap4, linux-image-3.0.0-1206-omap4
  • USN-1383-1: linux-ti-omap4, linux-image-2.6.38-1209-omap4
  • USN-1387-1: linux-image-2.6.35-32-virtual, linux-lts-backport-maverick, linux-image-2.6.35-32-generic, linux-image-2.6.35-32-generic-pae, linux-image-2.6.35-32-server
  • USN-1394-1: linux-image-2.6.35-903-omap4, linux-ti-omap4
  • USN-1356-1: linux-ti-omap4, linux-image-2.6.38-1209-omap4
  • USN-1364-1: linux-ti-omap4, linux-image-3.0.0-1207-omap4
  • USN-1240-1: linux-mvl-dove, linux-image-2.6.32-219-dove
  • USN-1245-1: linux-mvl-dove, linux-image-2.6.32-419-dove
  • USN-1361-1: linux-image-2.6.35-32-virtual, linux-image-2.6.35-32-powerpc, linux, linux-image-2.6.35-32-generic, linux-image-2.6.35-32-generic-pae, linux-image-2.6.35-32-versatile, linux-image-2.6.35-32-powerpc-smp, linux-image-2.6.35-32-omap, linux-image-2.6.35-32-powerpc64-smp, linux-image-2.6.35-32-server
  • USN-1167-1: linux-image-2.6.38-10-generic, linux-image-2.6.38-10-generic-pae, linux-image-2.6.38-10-powerpc-smp, linux-image-2.6.38-10-virtual, linux-image-2.6.38-10-powerpc, linux-image-2.6.38-10-server, linux-image-2.6.38-10-powerpc64-smp, linux, linux-image-2.6.38-10-versatile, linux-image-2.6.38-10-omap
  • USN-1340-1: linux-image-3.0.0-15-server, linux-lts-backport-oneiric, linux-image-3.0.0-15-generic, linux-image-3.0.0-15-virtual, linux-image-3.0.0-15-generic-pae
  • USN-1325-1: linux-image-2.6.35-903-omap4, linux-ti-omap4
  • USN-1555-1: linux-image-2.6.32-42-powerpc-smp, linux-image-2.6.32-42-generic, linux-image-2.6.32-42-powerpc64-smp, linux-image-2.6.32-42-sparc64, linux-image-2.6.32-42-virtual, linux, linux-image-2.6.32-42-preempt, linux-image-2.6.32-42-sparc64-smp, linux-image-2.6.32-42-powerpc, linux-image-2.6.32-42-generic-pae, linux-image-2.6.32-42-server, linux-image-2.6.32-42-386, linux-image-2.6.32-42-versatile, linux-image-2.6.32-42-lpia, linux-image-2.6.32-42-ia64
  • USN-1384-1: linux-image-3.0.0-16-virtual, linux-image-3.0.0-16-generic-pae, linux-lts-backport-oneiric, linux-image-3.0.0-16-server, linux-image-3.0.0-16-generic
  • USN-1253-1: linux-image-2.6.32-35-powerpc64-smp, linux-image-2.6.32-35-preempt, linux-image-2.6.32-35-generic, linux-image-2.6.32-35-server, linux-image-2.6.32-35-sparc64, linux-image-2.6.32-35-versatile, linux-image-2.6.32-35-ia64, linux-image-2.6.32-35-lpia, linux-image-2.6.32-35-powerpc-smp, linux-image-2.6.32-35-386, linux, linux-image-2.6.32-35-sparc64-smp, linux-image-2.6.32-35-virtual, linux-image-2.6.32-35-powerpc, linux-image-2.6.32-35-generic-pae
  • USN-1329-1: linux-ti-omap4, linux-image-2.6.38-1209-omap4
  • USN-1362-1: linux-image-2.6.38-13-server, linux-image-2.6.38-13-virtual, linux-image-2.6.38-13-powerpc, linux, linux-image-2.6.38-13-powerpc-smp, linux-image-2.6.38-13-generic, linux-image-2.6.38-13-generic-pae, linux-image-2.6.38-13-versatile, linux-image-2.6.38-13-powerpc64-smp, linux-image-2.6.38-13-omap
  • USN-1239-1: linux-ec2, linux-image-2.6.32-319-ec2
  • USN-1380-1: linux-image-2.6.38-13-server, linux-image-2.6.38-13-virtual, linux-image-2.6.38-13-powerpc, linux, linux-image-2.6.38-13-powerpc-smp, linux-image-2.6.38-13-generic, linux-image-2.6.38-13-generic-pae, linux-image-2.6.38-13-versatile, linux-image-2.6.38-13-powerpc64-smp, linux-image-2.6.38-13-omap
  • USN-1363-1: linux-image-3.0.0-16-powerpc, linux-image-3.0.0-16-powerpc64-smp, linux-image-3.0.0-16-virtual, linux, linux-image-3.0.0-16-omap, linux-image-3.0.0-16-generic-pae, linux-image-3.0.0-16-server, linux-image-3.0.0-16-powerpc-smp, linux-image-3.0.0-16-generic
  • USN-1388-1: linux-ec2, linux-image-2.6.32-343-ec2