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USN-1720-1: Linux kernel vulnerabilities

12 February 2013

Several security issues were fixed in the kernel.

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Releases

Packages

Details

It was discovered that hypervkvpd, which is distributed in the Linux
kernel, was not correctly validating the origin on Netlink messages. An
untrusted local user can cause a denial of service of Linux guests in
Hyper-V virtualization environments. (CVE-2012-2669)

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)

Florian Weimer discovered that hypervkvpd, which is distributed in the
Linux kernel, was not correctly validating source addresses of netlink
packets. An untrusted local user can cause a denial of service by causing
hypervkvpd to exit. (CVE-2012-5532)

Andrew Cooper of Citrix reported a Xen stack corruption in the Linux
kernel. An unprivileged user in a 32bit PVOPS guest can cause the guest
kernel to crash, or operate erroneously. (CVE-2013-0190)

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Update instructions

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

Ubuntu 11.10

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-1719-1: linux-image-3.0.0-31-generic-pae, linux-image-3.0.0-31-virtual, linux-image-3.0.0-31-server, linux-lts-backport-oneiric, linux-image-3.0.0-31-generic
  • USN-1529-1: linux-image-3.2.0-29-highbank, linux-image-3.2.0-29-omap, linux-image-3.2.0-29-powerpc-smp, linux-image-3.2.0-29-generic, linux-image-3.2.0-29-virtual, linux, linux-image-3.2.0-29-generic-pae, linux-image-3.2.0-29-powerpc64-smp
  • USN-1514-1: linux-image-3.2.0-1417-omap4, linux-ti-omap4
  • USN-1726-1: linux-ti-omap4, linux-image-3.0.0-1221-omap4
  • USN-1644-1: linux-image-3.2.0-34-highbank, linux-image-3.2.0-34-powerpc-smp, linux-image-3.2.0-34-virtual, linux-image-3.2.0-34-generic, linux-image-3.2.0-34-powerpc64-smp, linux-image-3.2.0-34-omap, linux, linux-image-3.2.0-34-generic-pae
  • USN-1900-1: linux-image-2.6.32-354-ec2, linux-ec2
  • USN-1645-1: linux-ti-omap4, linux-image-3.2.0-1422-omap4
  • USN-1704-1: linux-image-3.5.0-22-generic, linux-lts-quantal
  • USN-1673-1: linux-image-3.5.0-216-omap4, linux-ti-omap4
  • USN-1671-1: linux-image-3.5.0-21-powerpc-smp, linux-image-3.5.0-21-powerpc64-smp, linux-image-3.5.0-21-generic, linux, linux-image-3.5.0-21-highbank, linux-image-3.5.0-21-omap
  • USN-1899-1: linux-image-2.6.32-49-versatile, linux-image-2.6.32-49-generic-pae, linux-image-2.6.32-49-lpia, linux-image-2.6.32-49-386, linux-image-2.6.32-49-sparc64-smp, linux-image-2.6.32-49-preempt, linux-image-2.6.32-49-powerpc64-smp, linux-image-2.6.32-49-virtual, linux-image-2.6.32-49-powerpc-smp, linux-image-2.6.32-49-sparc64, linux, linux-image-2.6.32-49-server, linux-image-2.6.32-49-powerpc, linux-image-2.6.32-49-ia64, linux-image-2.6.32-49-generic
  • USN-1700-1: linux-ti-omap4, linux-image-3.5.0-217-omap4
  • USN-1698-1: linux-ti-omap4, linux-image-3.2.0-1424-omap4
  • USN-1696-1: linux-image-3.2.0-36-powerpc64-smp, linux-image-3.2.0-36-highbank, linux-image-3.2.0-36-omap, linux-image-3.2.0-36-powerpc-smp, linux-image-3.2.0-36-virtual, linux, linux-image-3.2.0-36-generic, linux-image-3.2.0-36-generic-pae
  • USN-1699-1: linux-image-3.5.0-22-generic, linux-image-3.5.0-22-omap, linux, linux-image-3.5.0-22-highbank, linux-image-3.5.0-22-powerpc64-smp, linux-image-3.5.0-22-powerpc-smp
  • USN-1767-1: linux-image-3.2.0-39-virtual, linux-image-3.2.0-39-generic, linux, linux-image-3.2.0-39-highbank, linux-image-3.2.0-39-powerpc64-smp, linux-image-3.2.0-39-omap, linux-image-3.2.0-39-generic-pae, linux-image-3.2.0-39-powerpc-smp
  • USN-1769-1: linux-image-3.5.0-26-powerpc64-smp, linux-image-3.5.0-26-generic, linux-image-3.5.0-26-powerpc-smp, linux, linux-image-3.5.0-26-highbank, linux-image-3.5.0-26-omap
  • USN-1728-1: linux-ec2, linux-image-2.6.32-350-ec2
  • USN-1774-1: linux-ti-omap4, linux-image-3.5.0-221-omap4
  • USN-1768-1: linux-image-3.5.0-26-generic, linux-lts-quantal
  • USN-1725-1: linux-image-2.6.32-45-ia64, linux-image-2.6.32-45-386, linux-image-2.6.32-45-sparc64-smp, linux-image-2.6.32-45-virtual, linux-image-2.6.32-45-powerpc-smp, linux-image-2.6.32-45-generic-pae, linux-image-2.6.32-45-powerpc, linux-image-2.6.32-45-sparc64, linux-image-2.6.32-45-powerpc64-smp, linux, linux-image-2.6.32-45-preempt, linux-image-2.6.32-45-lpia, linux-image-2.6.32-45-generic, linux-image-2.6.32-45-server, linux-image-2.6.32-45-versatile

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Further reading