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Ubuntu 12.10: USN-1972-1 Moderate: Kernel Denial Of Service Exploits

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Calendar Grey September 27, 2013
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Ubuntu 12.10 kernel patch released to fix vulnerabilities posing risks for users. Prompt upgrade strongly advised.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

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 exploit Ubuntu patch kernel system crash

Update Instructions

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

Ubuntu 12.10:
  linux-image-3.5.0-41-generic    3.5.0-41.64
  linux-image-3.5.0-41-highbank   3.5.0-41.64
  linux-image-3.5.0-41-omap       3.5.0-41.64
  linux-image-3.5.0-41-powerpc-smp  3.5.0-41.64
  linux-image-3.5.0-41-powerpc64-smp  3.5.0-41.64

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-1972-1

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

September 27, 2013

Topics%20covered

Topics Covered

security advisory denial of service exploit Ubuntu patch kernel system crash

Package Information

https://launchpad.net/ubuntu/+source/linux/3.5.0-41.64

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