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==========================================================================
Ubuntu Security Notice USN-1688-1
January 15, 2013

linux-lts-backport-oneiric vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux-lts-backport-oneiric: Linux kernel backport from Oneiric

Details:

Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual
machine) subsystem's handling of the XSAVE feature. On hosts, using qemu
userspace, without the XSAVE feature an unprivileged local attacker could
exploit this flaw to crash the system. (CVE-2012-4461)

A flaw was discovered in the Linux kernel's handling of script execution
when module loading is enabled. A local attacker could exploit this flaw to
cause a leak of kernel stack contents. (CVE-2012-4530)

Update instructions:

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

Ubuntu 10.04 LTS:
  linux-image-3.0.0-30-generic    3.0.0-30.47~lucid1
  linux-image-3.0.0-30-generic-pae  3.0.0-30.47~lucid1
  linux-image-3.0.0-30-server     3.0.0-30.47~lucid1
  linux-image-3.0.0-30-virtual    3.0.0-30.47~lucid1

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:
  http://www.ubuntu.com/usn/usn-1688-1
  CVE-2012-4461, CVE-2012-4530

Package Information:
  https://launchpad.net/ubuntu/+source/linux-lts-backport-oneiric/3.0.0-30.47~lucid1


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