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Ubuntu 12.04 LTS USN-3159-1 Critical: Linux Kernel Info Exposure

ubuntu
Calendar Grey December 20, 2016
Scroller Ubuntu
Ubuntu 12.04 LTS contains a kernel flaw that jeopardizes confidential information. It is essential to apply updates for safeguarding and security.
The system could be made to expose sensitive information.

Summary

The system could be made to expose sensitive information.

Software Description:

- linux: Linux kernel

Details:

It was discovered that a race condition existed in the procfs

environ_read function in the Linux kernel, leading to an integer

underflow. A local attacker could use this to expose sensitive

information (kernel memory).

Topics%20covered

Topics Covered

security advisory critical information exposure ubuntu linux kernel

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-119-generic   3.2.0-119.162
  linux-image-3.2.0-119-generic-pae  3.2.0-119.162
  linux-image-3.2.0-119-highbank  3.2.0-119.162
  linux-image-3.2.0-119-omap      3.2.0-119.162
  linux-image-3.2.0-119-powerpc-smp  3.2.0-119.162
  linux-image-3.2.0-119-powerpc64-smp  3.2.0-119.162
  linux-image-3.2.0-119-virtual   3.2.0-119.162
  linux-image-generic             3.2.0.119.134
  linux-image-generic-pae         3.2.0.119.134
  linux-image-highbank            3.2.0.119.134
  linux-image-omap                3.2.0.119.134
  linux-image-powerpc-smp         3.2.0.119.134
  linux-image-powerpc64-smp       3.2.0.119.134
  linux-image-virtual             3.2.0.119.134

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-3159-1

CVE-2016-7916

Severity
critical
Lowest
Low
Medium
High
Critical

December 20, 2016

Topics%20covered

Topics Covered

security advisory critical information exposure ubuntu linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-119.162

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