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USN-1940-1: Linux kernel (EC2) vulnerabilities

6 September 2013

Several security issues were fixed in the kernel.




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)

Michael S. Tsirkin discovered a flaw in how the Linux kernel's KVM
subsystem allocates memory slots for the guest's address space. A local
user could exploit this flaw to gain system privileges or obtain sensitive
information from kernel memory. (CVE-2013-1943)

A flaw was discovered in the SCTP (stream control transfer protocol)
network protocol's handling of duplicate cookies in the Linux kernel. A
remote attacker could exploit this flaw to cause a denial of service
(system crash) on another remote user querying the SCTP connection.

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)

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-1941-1: linux-image-3.2.0-53-generic-pae, linux-image-3.2.0-53-powerpc-smp, linux-image-3.2.0-53-generic, linux-image-3.2.0-53-powerpc64-smp, linux-image-3.2.0-53-highbank, linux, linux-image-3.2.0-53-omap, 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-1947-1: linux-image-3.5.0-40-generic, linux-lts-quantal
  • USN-1946-1: linux-image-3.5.0-232-omap4, linux-ti-omap4
  • USN-1938-1: linux, linux-image-3.8.0-30-generic
  • USN-1939-1: linux-image-2.6.32-51-preempt, linux-image-2.6.32-51-server, linux-image-2.6.32-51-virtual, linux-image-2.6.32-51-powerpc64-smp, linux-image-2.6.32-51-powerpc, linux-image-2.6.32-51-generic-pae, linux-image-2.6.32-51-ia64, linux-image-2.6.32-51-386, linux-image-2.6.32-51-lpia, linux, 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-powerpc-smp, linux-image-2.6.32-51-generic
  • USN-1944-1: linux-image-3.5.0-40-highbank, linux-image-3.5.0-40-powerpc-smp, linux-image-3.5.0-40-powerpc64-smp, linux-image-3.5.0-40-generic, linux, linux-image-3.5.0-40-omap
  • USN-1945-1: linux-image-3.5.0-232-omap4, linux-ti-omap4
  • USN-1812-1: linux-image-3.5.0-28-generic, linux-lts-quantal
  • USN-1809-1: linux-image-3.2.0-41-generic, linux-image-3.2.0-41-omap, linux-image-3.2.0-41-powerpc-smp, linux-image-3.2.0-41-powerpc64-smp, linux-image-3.2.0-41-virtual, linux-image-3.2.0-41-generic-pae, linux, linux-image-3.2.0-41-highbank
  • USN-1813-1: linux-image-3.5.0-28-generic, linux-image-3.5.0-28-omap, linux-image-3.5.0-28-highbank, linux-image-3.5.0-28-powerpc-smp, linux-image-3.5.0-28-powerpc64-smp, linux
  • USN-1814-1: linux-ti-omap4, linux-image-3.5.0-223-omap4
  • USN-1811-1: linux-ti-omap4, linux-image-3.2.0-1430-omap4