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Ubuntu 12.04 LTS: USN-1970-1 Moderate: Linux Kernel Denial of Service

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Calendar Grey September 27, 2013
Scroller Ubuntu
=========================================================================Ubuntu Security Notice USN-
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-quantal: Linux hardware enablement kernel from Quantal

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 failure to validate block numbers was discovered in the Linux kernel's

implementation of the XFS filesystem. A local user can cause a denial of

service (system crash) if they can mount, or cause to be mounted a

corrupted or special crafted XFS filesystem. (CVE-2013-1819)

An information leak was discovered in the Linux kernel's IPSec key_socket

when using the notify_policy interface. A local user could exploit this

flaw to examine potentially sensitive information in kernel memory.

(CVE-2013-2237)

Topics%20covered

Topics Covered

security advisory denial of service privilege escalation system update ubuntu linux kernel xfs file system

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.5.0-41-generic    3.5.0-41.64~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

https://ubuntu.com/security/notices/USN-1970-1

CVE-2013-1819, CVE-2013-2237, CVE-2013-4254

September 27, 2013

Topics%20covered

Topics Covered

security advisory denial of service privilege escalation system update ubuntu linux kernel xfs file system

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-quantal/3.5.0-41.64~precise1

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