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USN-1579-1: Linux kernel vulnerabilities

21 September 2012

Several security issues were fixed in the kernel.




Ben Hutchings reported a flaw in the Linux kernel with some network drivers
that support TSO (TCP segment offload). A local or peer user could exploit
this flaw to to cause a denial of service. (CVE-2012-3412)

Jay Fenlason and Doug Ledford discovered a bug in the Linux kernel
implementation of RDS sockets. A local unprivileged user could potentially
use this flaw to read privileged information from the kernel.

Mathias Krause discovered an information leak in the Linux kernel's TUN/TAP
device driver. A local user could exploit this flaw to examine part of the
kernel's stack memory. (CVE-2012-6547)

A flaw was discovered in the requeuing of futexes in the Linux kernel. A
local user could exploit this flaw to cause a denial of service (system
crash) or possibly have other unspecified impact. (CVE-2012-6647)

A flaw was found in Linux kernel's validation of CIPSO (Common IP Security
Option) options set from userspace. A local user that can set a socket's
CIPSO options could exploit this flaw to cause a denial of service (crash
the system). (CVE-2013-0310)

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-1568-1: linux-image-3.0.0-26-omap, linux-image-3.0.0-26-virtual, linux-image-3.0.0-26-server, linux-image-3.0.0-26-generic-pae, linux, linux-image-3.0.0-26-powerpc-smp, linux-image-3.0.0-26-powerpc, linux-image-3.0.0-26-generic, linux-image-3.0.0-26-powerpc64-smp
  • USN-1574-1: linux-image-2.6.38-16-virtual, linux-image-2.6.38-16-generic, linux-lts-backport-natty, linux-image-2.6.38-16-generic-pae, linux-image-2.6.38-16-server
  • USN-1580-1: linux-ti-omap4, linux-image-3.2.0-1419-omap4
  • USN-1572-1: linux-image-2.6.32-43-lpia, linux-image-2.6.32-43-virtual, linux-image-2.6.32-43-powerpc, linux-image-2.6.32-43-preempt, linux-image-2.6.32-43-server, linux-image-2.6.32-43-ia64, linux-image-2.6.32-43-powerpc64-smp, linux-image-2.6.32-43-versatile, linux, linux-image-2.6.32-43-sparc64, linux-image-2.6.32-43-generic-pae, linux-image-2.6.32-43-powerpc-smp, linux-image-2.6.32-43-sparc64-smp, linux-image-2.6.32-43-generic, linux-image-2.6.32-43-386
  • USN-1577-1: linux-ti-omap4, linux-image-2.6.38-1209-omap4
  • USN-1578-1: linux-ti-omap4, linux-image-3.0.0-1216-omap4
  • USN-1573-1: linux-ec2, linux-image-2.6.32-348-ec2
  • USN-1567-1: linux-image-2.6.38-16-virtual, linux-image-2.6.38-16-generic, linux-image-2.6.38-16-versatile, linux-image-2.6.38-16-powerpc, linux-image-2.6.38-16-omap, linux-image-2.6.38-16-powerpc-smp, linux, linux-image-2.6.38-16-generic-pae, linux-image-2.6.38-16-server, linux-image-2.6.38-16-powerpc64-smp
  • USN-1575-1: linux-image-3.0.0-26-virtual, linux-image-3.0.0-26-server, linux-image-3.0.0-26-generic-pae, linux-lts-backport-oneiric, linux-image-3.0.0-26-generic
  • USN-1653-1: linux-ec2, linux-image-2.6.32-350-ec2
  • USN-1554-1: linux-image-3.0.0-25-powerpc-smp, linux-image-3.0.0-25-generic, linux-image-3.0.0-25-virtual, linux-image-3.0.0-25-generic-pae, linux-image-3.0.0-25-server, linux, linux-image-3.0.0-25-omap, linux-image-3.0.0-25-powerpc, linux-image-3.0.0-25-powerpc64-smp
  • USN-1651-1: linux-image-2.6.32-45-lpia, linux-image-2.6.32-45-generic, linux-image-2.6.32-45-server, linux-image-2.6.32-45-preempt, linux-image-2.6.32-45-ia64, linux-image-2.6.32-45-versatile, linux-image-2.6.32-45-powerpc64-smp, linux-image-2.6.32-45-powerpc-smp, linux, linux-image-2.6.32-45-sparc64, linux-image-2.6.32-45-386, linux-image-2.6.32-45-generic-pae, linux-image-2.6.32-45-virtual, linux-image-2.6.32-45-sparc64-smp, linux-image-2.6.32-45-powerpc
  • USN-1558-1: linux-ti-omap4, linux-image-3.0.0-1215-omap4
  • USN-1563-1: linux-image-3.0.0-25-generic, linux-image-3.0.0-25-virtual, linux-image-3.0.0-25-generic-pae, linux-image-3.0.0-25-server, linux-lts-backport-oneiric