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USN-1941-1: Linux kernel vulnerabilities

6 September 2013

Several security issues were fixed in the kernel.




Chanam Park reported a Null pointer flaw in the Linux kernel's Ceph client.
A remote attacker could exploit this flaw to cause a denial of service
(system crash). (CVE-2013-1059)

Vasily Kulikov discovered a flaw in the Linux Kernel's perf tool that
allows for privilege escalation. A local user could exploit this flaw to
run commands as root when using the perf tool. (CVE-2013-1060)

Jonathan Salwan discovered an information leak in the Linux kernel's cdrom
driver. A local user can exploit this leak to obtain sensitive information
from kernel memory if the CD-ROM drive is malfunctioning. (CVE-2013-2164)

A flaw was discovered in the Linux kernel when an IPv6 socket is used to
connect to an IPv4 destination. An unprivileged local user could exploit
this flaw to cause a denial of service (system crash). (CVE-2013-2232)

An information leak was discovered in the IPSec key_socket implementation
in the Linux kernel. An local user could exploit this flaw to examine
potentially sensitive information in kernel memory. (CVE-2013-2234)

Kees Cook discovered a format string vulnerability in the Linux kernel's
disk block layer. A local user with administrator privileges could exploit
this flaw to gain kernel privileges. (CVE-2013-2851)

Hannes Frederic Sowa discovered a flaw in setsockopt UDP_CORK option in the
Linux kernel's IPv6 stack. A local user could exploit this flaw to cause a
denial of service (system crash). (CVE-2013-4162)

Hannes Frederic Sowa discovered a flaw in the IPv6 subsystem of the Linux
kernel when the IPV6_MTU setsockopt option has been specified in
combination with the UDP_CORK option. A local user could exploit this flaw
to cause a denial of service (system crash). (CVE-2013-4163)

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-1932-1: linux-image-3.5.0-39-highbank, linux-image-3.5.0-39-powerpc64-smp, linux-image-3.5.0-39-omap, linux-image-3.5.0-39-generic, linux-image-3.5.0-39-powerpc-smp, linux
  • USN-1934-1: linux-image-3.5.0-231-omap4, linux-ti-omap4
  • USN-1936-1: linux-lts-raring, linux-image-3.8.0-29-generic
  • USN-1935-1: linux-image-3.8.0-29-generic, linux
  • USN-1933-1: linux-image-3.5.0-231-omap4, linux-ti-omap4
  • USN-1942-1: linux-ti-omap4, linux-image-3.2.0-1437-omap4
  • USN-1931-1: linux-lts-quantal, linux-image-3.5.0-39-generic
  • USN-1943-1: linux-lts-raring, linux-image-3.8.0-30-generic
  • USN-1940-1: linux-image-2.6.32-356-ec2, linux-ec2
  • USN-1947-1: linux-lts-quantal, linux-image-3.5.0-40-generic
  • USN-1946-1: linux-ti-omap4, linux-image-3.5.0-232-omap4
  • USN-1938-1: linux-image-3.8.0-30-generic, linux
  • USN-1939-1: linux-image-2.6.32-51-generic, linux-image-2.6.32-51-powerpc, linux-image-2.6.32-51-virtual, linux-image-2.6.32-51-server, linux-image-2.6.32-51-sparc64, linux-image-2.6.32-51-sparc64-smp, linux-image-2.6.32-51-versatile, linux-image-2.6.32-51-generic-pae, linux-image-2.6.32-51-ia64, linux-image-2.6.32-51-lpia, linux-image-2.6.32-51-preempt, linux-image-2.6.32-51-powerpc-smp, linux-image-2.6.32-51-powerpc64-smp, linux, linux-image-2.6.32-51-386
  • USN-1944-1: linux-image-3.5.0-40-highbank, linux-image-3.5.0-40-omap, linux-image-3.5.0-40-powerpc-smp, linux-image-3.5.0-40-generic, linux, linux-image-3.5.0-40-powerpc64-smp
  • USN-1945-1: linux-ti-omap4, linux-image-3.5.0-232-omap4
  • USN-1912-1: linux-image-2.6.32-50-lpia, linux-image-2.6.32-50-generic-pae, linux-image-2.6.32-50-server, linux-image-2.6.32-50-sparc64, linux-image-2.6.32-50-versatile, linux-image-2.6.32-50-powerpc64-smp, linux-image-2.6.32-50-generic, linux-image-2.6.32-50-powerpc-smp, linux-image-2.6.32-50-virtual, linux-image-2.6.32-50-386, linux-image-2.6.32-50-ia64, linux-image-2.6.32-50-preempt, linux-image-2.6.32-50-powerpc, linux, linux-image-2.6.32-50-sparc64-smp
  • USN-1913-1: linux-image-2.6.32-355-ec2, linux-ec2