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USN-1974-1: Linux kernel vulnerabilities

27 September 2013

Several security issues were fixed in the kernel.

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Releases

Packages

Details

Vince Weaver discovered a flaw in the perf subsystem of the Linux kernel on
ARM platforms. A local user could exploit this flaw to gain privileges or
cause a denial of service (system crash). (CVE-2013-4254)

A memory leak was discovered in the user namespace facility of the Linux
kernel. A local user could cause a denial of service (memory consumption)
via the CLONE_NEWUSER unshare call. (CVE-2013-4205)

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Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 13.04

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.

References

Related notices

  • USN-1971-1: linux-image-3.8.0-31-generic, linux-lts-raring
  • USN-1968-1: linux-image-3.2.0-54-powerpc-smp, linux-image-3.2.0-54-virtual, linux-image-3.2.0-54-highbank, linux-image-3.2.0-54-generic, linux-image-3.2.0-54-powerpc64-smp, linux-image-3.2.0-54-generic-pae, linux-image-3.2.0-54-omap, linux
  • USN-1969-1: linux-ti-omap4, linux-image-3.2.0-1438-omap4
  • USN-1973-1: linux-ti-omap4, linux-image-3.5.0-233-omap4
  • USN-1970-1: linux-lts-quantal, linux-image-3.5.0-41-generic
  • USN-1975-1: linux-ti-omap4, linux-image-3.5.0-233-omap4
  • USN-1972-1: linux-image-3.5.0-41-generic, linux-image-3.5.0-41-omap, linux-image-3.5.0-41-highbank, linux-image-3.5.0-41-powerpc64-smp, linux, linux-image-3.5.0-41-powerpc-smp

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Further reading