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USN-1941-1: Linux kernel vulnerabilities

6 September 2013

Several security issues were fixed in the kernel.

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Releases

Packages

Details

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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

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