1. Ubuntu Security Notices
  2. USN-2283-1

USN-2283-1: Linux kernel vulnerabilities

Publication date

16 July 2014

Overview

Several security issues were fixed in the kernel.

Releases

Packages

Details

Sasha Levin reported a flaw in the Linux kernel's point-to-point protocol
(PPP) when used with the Layer Two Tunneling Protocol (L2TP). A local user
could exploit this flaw to gain administrative privileges. (CVE-2014-4943)

Michael S. Tsirkin discovered an information leak in the Linux kernel's
segmentation of skbs when using the zerocopy feature of vhost-net. A local
attacker could exploit this flaw to gain potentially sensitive information
from kernel memory. (CVE-2014-0131)

Sasha Levin reported a flaw in the Linux kernel's point-to-point protocol
(PPP) when used with the Layer Two Tunneling Protocol (L2TP). A local user
could exploit this flaw to gain administrative privileges. (CVE-2014-4943)

Michael S. Tsirkin discovered an information leak in the Linux kernel's
segmentation of skbs when using the zerocopy feature of vhost-net. A local
attacker could exploit this flaw to gain potentially sensitive information
from kernel memory. (CVE-2014-0131)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
12.04 precise linux-image-3.2.0-67-highbank –  3.2.0-67.101
linux-image-3.2.0-67-generic-pae –  3.2.0-67.101
linux-image-3.2.0-67-powerpc64-smp –  3.2.0-67.101
linux-image-3.2.0-67-omap –  3.2.0-67.101
linux-image-3.2.0-67-generic –  3.2.0-67.101
linux-image-3.2.0-67-powerpc-smp –  3.2.0-67.101
linux-image-3.2.0-67-virtual –  3.2.0-67.101

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References

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