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Ubuntu 12.04 LTS USN-2283-1 Critical: Kernel Issues and Fixes

ubuntu
Calendar Grey July 17, 2014
Scroller Ubuntu
Resolves multiple vulnerabilities in the Linux kernel that affect local security exploits in Ubuntu 12.04 LTS.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

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)

Don Bailey discovered a flaw in the LZO decompress algorithm used by the

Linux kernel. An attacker could exploit this flaw to cause a denial of

service (memory corruption or OOPS). (CVE-2014-4608)

Topics%20covered

Topics Covered

security advisory denial of service information leak critical Ubuntu local exploit kernel issue

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-67-generic    3.2.0-67.101
  linux-image-3.2.0-67-generic-pae  3.2.0-67.101
  linux-image-3.2.0-67-highbank   3.2.0-67.101
  linux-image-3.2.0-67-omap       3.2.0-67.101
  linux-image-3.2.0-67-powerpc-smp  3.2.0-67.101
  linux-image-3.2.0-67-powerpc64-smp  3.2.0-67.101
  linux-image-3.2.0-67-virtual    3.2.0-67.101

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-2283-1

CVE-2014-0131, CVE-2014-4608, CVE-2014-4943

Severity
critical
Lowest
Low
Medium
High
Critical

July 16, 2014

Topics%20covered

Topics Covered

security advisory denial of service information leak critical Ubuntu local exploit kernel issue

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-67.101

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