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USN-1671-1: Linux kernel vulnerability

19 December 2012

The system could be made to crash under certain conditions.

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Releases

Packages

Details

Dmitry Monakhov reported a race condition flaw the Linux ext4 filesystem
that can expose stale data. An unprivileged user could exploit this flaw to
cause an information leak. (CVE-2012-4508)

A flaw was discovered in the Linux kernel's handling of new hot-plugged
memory. An unprivileged local user could exploit this flaw to cause a
denial of service by crashing the system. (CVE-2012-5517)

An information leak was discovered in the Linux kernel's /dev/dvb device. A
local user could exploit this flaw to obtain sensitive information from the
kernel's stack memory. (CVE-2013-1928)

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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.

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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-1644-1: linux, linux-image-3.2.0-34-virtual, linux-image-3.2.0-34-generic, linux-image-3.2.0-34-omap, linux-image-3.2.0-34-generic-pae, linux-image-3.2.0-34-powerpc-smp, linux-image-3.2.0-34-highbank, linux-image-3.2.0-34-powerpc64-smp
  • USN-1719-1: linux-image-3.0.0-31-generic, linux-image-3.0.0-31-virtual, linux-lts-backport-oneiric, linux-image-3.0.0-31-server, linux-image-3.0.0-31-generic-pae
  • USN-1900-1: linux-ec2, linux-image-2.6.32-354-ec2
  • USN-1645-1: linux-image-3.2.0-1422-omap4, linux-ti-omap4
  • USN-1704-1: linux-lts-quantal, linux-image-3.5.0-22-generic
  • USN-1673-1: linux-image-3.5.0-216-omap4, linux-ti-omap4
  • USN-1720-1: linux, linux-image-3.0.0-31-omap, linux-image-3.0.0-31-generic, linux-image-3.0.0-31-virtual, linux-image-3.0.0-31-powerpc, linux-image-3.0.0-31-server, linux-image-3.0.0-31-powerpc-smp, linux-image-3.0.0-31-powerpc64-smp, linux-image-3.0.0-31-generic-pae
  • USN-1726-1: linux-ti-omap4, linux-image-3.0.0-1221-omap4
  • USN-1899-1: linux, linux-image-2.6.32-49-lpia, linux-image-2.6.32-49-powerpc, linux-image-2.6.32-49-versatile, linux-image-2.6.32-49-server, linux-image-2.6.32-49-sparc64-smp, linux-image-2.6.32-49-sparc64, linux-image-2.6.32-49-ia64, linux-image-2.6.32-49-generic, linux-image-2.6.32-49-386, linux-image-2.6.32-49-powerpc64-smp, linux-image-2.6.32-49-virtual, linux-image-2.6.32-49-preempt, linux-image-2.6.32-49-generic-pae, linux-image-2.6.32-49-powerpc-smp
  • USN-1679-1: linux-image-3.0.0-1219-omap4, linux-ti-omap4
  • USN-1678-1: linux-image-3.0.0-29-generic, linux-image-3.0.0-29-generic-pae, linux-lts-backport-oneiric, linux-image-3.0.0-29-server, linux-image-3.0.0-29-virtual
  • USN-1670-1: linux-ti-omap4, linux-image-3.2.0-1423-omap4
  • USN-1677-1: linux, linux-image-3.0.0-29-omap, linux-image-3.0.0-29-generic-pae, linux-image-3.0.0-29-virtual, linux-image-3.0.0-29-powerpc64-smp, linux-image-3.0.0-29-powerpc, linux-image-3.0.0-29-server, linux-image-3.0.0-29-powerpc-smp, linux-image-3.0.0-29-generic
  • USN-1669-1: linux, linux-image-3.2.0-35-powerpc64-smp, linux-image-3.2.0-35-highbank, linux-image-3.2.0-35-generic, linux-image-3.2.0-35-omap, linux-image-3.2.0-35-powerpc-smp, linux-image-3.2.0-35-generic-pae, linux-image-3.2.0-35-virtual
  • USN-1648-1: linux, linux-image-3.0.0-28-powerpc, linux-image-3.0.0-28-generic-pae, linux-image-3.0.0-28-server, linux-image-3.0.0-28-virtual, linux-image-3.0.0-28-omap, linux-image-3.0.0-28-powerpc-smp, linux-image-3.0.0-28-generic, linux-image-3.0.0-28-powerpc64-smp
  • USN-1649-1: linux-ti-omap4, linux-image-3.0.0-1218-omap4
  • USN-1829-1: linux-ec2, linux-image-2.6.32-352-ec2
  • USN-1824-1: linux, linux-image-2.6.32-47-preempt, linux-image-2.6.32-47-powerpc, linux-image-2.6.32-47-generic-pae, linux-image-2.6.32-47-ia64, linux-image-2.6.32-47-386, linux-image-2.6.32-47-versatile, linux-image-2.6.32-47-virtual, linux-image-2.6.32-47-sparc64, linux-image-2.6.32-47-server, linux-image-2.6.32-47-powerpc64-smp, linux-image-2.6.32-47-sparc64-smp, linux-image-2.6.32-47-generic, linux-image-2.6.32-47-powerpc-smp, linux-image-2.6.32-47-lpia
  • USN-1652-1: linux-image-3.0.0-28-generic-pae, linux-image-3.0.0-28-server, linux-image-3.0.0-28-virtual, linux-lts-backport-oneiric, linux-image-3.0.0-28-generic

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