USN-3159-1: Linux kernel vulnerability
Ubuntu Security Notice USN-3159-1
20th December, 2016
linux vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 12.04 LTS
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).
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 12.04 LTS:
-
linux-image-3.2.0-119-generic-pae
3.2.0-119.162
-
linux-image-3.2.0-119-omap
3.2.0-119.162
-
linux-image-powerpc-smp
3.2.0.119.134
-
linux-image-3.2.0-119-powerpc-smp
3.2.0-119.162
-
linux-image-generic-pae
3.2.0.119.134
-
linux-image-highbank
3.2.0.119.134
-
linux-image-3.2.0-119-powerpc64-smp
3.2.0-119.162
-
linux-image-virtual
3.2.0.119.134
-
linux-image-powerpc64-smp
3.2.0.119.134
-
linux-image-generic
3.2.0.119.134
-
linux-image-3.2.0-119-generic
3.2.0-119.162
-
linux-image-3.2.0-119-virtual
3.2.0-119.162
-
linux-image-omap
3.2.0.119.134
-
linux-image-3.2.0-119-highbank
3.2.0-119.162
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
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
Source: USN-3159-1: Linux kernel vulnerability
