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Ubuntu 12.04 LTS USN-3159-2 Critical: Linux Kernel Race Condition

ubuntu
Calendar Grey December 20, 2016
Scroller Ubuntu
Ubuntu Security Notice USN-3159-3 resolves a severe kernel vulnerability that could potentially leak confidential information via a synchronization flaw.
The system could be made to expose sensitive information.

Summary

The system could be made to expose sensitive information.

Software Description:

- linux-ti-omap4: Linux kernel for OMAP4

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 race condition ubuntu linux-ti-omap4 sensitive data exposure

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-1497-omap4    3.2.0-1497.124
  linux-image-omap4               3.2.0.1497.92

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-3159-2

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 race condition ubuntu linux-ti-omap4 sensitive data exposure

Package Information

https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1497.124

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