Your submission was sent successfully! Close

Thank you for contacting us. A member of our team will be in touch shortly. Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-1944-1: Linux kernel vulnerabilities

6 September 2013

Several security issues were fixed in the kernel.

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

Releases

Packages

Details

A denial of service flaw was discovered in the Btrfs file system in the
Linux kernel. A local user could cause a denial of service by creating a
large number of files with names that have the same CRC32 hash value.
(CVE-2012-5374)

A denial of service flaw was discovered in the Btrfs file system in the
Linux kernel. A local user could cause a denial of service (prevent file
creation) for a victim, by creating a file with a specific CRC32C hash
value in a directory important to the victim. (CVE-2012-5375)

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)

A flaw was discovered in the Xen subsystem of the Linux kernel when it
provides read-only access to a disk that supports TRIM or SCSI UNMAP to a
guest OS. A privileged user in the guest OS could exploit this flaw to
destroy data on the disk, even though the guest OS should not be able to
write to the disk. (CVE-2013-2140)

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)

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 12.10

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.

References

Related notices

  • USN-2017-1: linux, linux-image-3.2.0-56-virtual, linux-image-3.2.0-56-generic-pae, linux-image-3.2.0-56-generic, linux-image-3.2.0-56-omap, linux-image-3.2.0-56-powerpc64-smp, linux-image-3.2.0-56-powerpc-smp, linux-image-3.2.0-56-highbank
  • 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-2018-1: linux-ti-omap4, linux-image-3.2.0-1440-omap4
  • USN-1945-1: linux-ti-omap4, linux-image-3.5.0-232-omap4
  • USN-1941-1: linux, linux-image-3.2.0-53-generic-pae, linux-image-3.2.0-53-highbank, linux-image-3.2.0-53-generic, linux-image-3.2.0-53-powerpc64-smp, linux-image-3.2.0-53-omap, linux-image-3.2.0-53-powerpc-smp, linux-image-3.2.0-53-virtual
  • USN-1943-1: linux-lts-raring, linux-image-3.8.0-30-generic
  • USN-1942-1: linux-ti-omap4, linux-image-3.2.0-1437-omap4
  • USN-1940-1: linux-ec2, linux-image-2.6.32-356-ec2
  • USN-1938-1: linux, linux-image-3.8.0-30-generic
  • USN-1939-1: linux, linux-image-2.6.32-51-powerpc-smp, linux-image-2.6.32-51-sparc64, linux-image-2.6.32-51-lpia, linux-image-2.6.32-51-generic-pae, linux-image-2.6.32-51-generic, linux-image-2.6.32-51-server, linux-image-2.6.32-51-sparc64-smp, linux-image-2.6.32-51-ia64, linux-image-2.6.32-51-386, linux-image-2.6.32-51-powerpc, linux-image-2.6.32-51-virtual, linux-image-2.6.32-51-preempt, linux-image-2.6.32-51-versatile, linux-image-2.6.32-51-powerpc64-smp
  • USN-2038-1: linux, linux-image-3.2.0-57-virtual, linux-image-3.2.0-57-highbank, linux-image-3.2.0-57-powerpc64-smp, linux-image-3.2.0-57-powerpc-smp, linux-image-3.2.0-57-generic-pae, linux-image-3.2.0-57-generic, linux-image-3.2.0-57-omap
  • USN-2039-1: linux-ti-omap4, linux-image-3.2.0-1441-omap4
  • USN-1912-1: linux, linux-image-2.6.32-50-virtual, linux-image-2.6.32-50-386, linux-image-2.6.32-50-lpia, linux-image-2.6.32-50-sparc64, linux-image-2.6.32-50-generic, linux-image-2.6.32-50-versatile, linux-image-2.6.32-50-powerpc, linux-image-2.6.32-50-ia64, linux-image-2.6.32-50-powerpc64-smp, linux-image-2.6.32-50-generic-pae, linux-image-2.6.32-50-preempt, linux-image-2.6.32-50-server, linux-image-2.6.32-50-powerpc-smp, linux-image-2.6.32-50-sparc64-smp
  • USN-1913-1: linux-image-2.6.32-355-ec2, linux-ec2

Join the discussion

Need help with your security needs?

Ubuntu Pro provides up to ten-year security coverage for over 23,000 open-source packages within the Ubuntu Main and Universe repositories.

Talk to an expert to find out what would work best for you

Further reading