Ubuntu alert USN-1971-1 (linux-lts-raring)

From:
    	       John Johansen <john.johansen@canonical.com> 
To:
    	       ubuntu-security-announce@lists.ubuntu.com 
Subject:
    	       [USN-1971-1] Linux kernel (Raring HWE) vulnerabilities 
Date:
    	       Fri, 27 Sep 2013 06:14:02 -0700
Message-ID:
    	       <5245849A.3020305@canonical.com>
Archive-link:
    	       Article, Thread

==========================================================================
Ubuntu Security Notice USN-1971-1
September 27, 2013

linux-lts-raring vulnerabilities
==========================================================================

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

- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux-lts-raring: Linux hardware enablement kernel from Raring

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)

Update instructions:

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

Ubuntu 12.04 LTS:
  linux-image-3.8.0-31-generic    3.8.0-31.46~precise1

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-1971-1

  CVE-2013-4205, CVE-2013-4254

Package Information:
  https://launchpad.net/ubuntu/+source/linux-lts-raring/3.8...

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