USN-2596-1: Linux kernel vulnerability
Ubuntu Security Notice USN-2596-1
5th May, 2015
linux vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
Summary
The system could be made to run programs as an administrator.
Software description
- linux - Linux kernel
Details
A race condition between chown() and execve() was discovered in the Linux
kernel. A local attacker could exploit this race by using chown on a
setuid-user-binary to gain administrative privileges.
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 12.04 LTS:
- linux-image-3.2.0-83-omap 3.2.0-83.120
- linux-image-3.2.0-83-powerpc-smp 3.2.0-83.120
- linux-image-3.2.0-83-highbank 3.2.0-83.120
- linux-image-3.2.0-83-powerpc64-smp 3.2.0-83.120
- linux-image-3.2.0-83-generic-pae 3.2.0-83.120
- linux-image-3.2.0-83-virtual 3.2.0-83.120
- linux-image-3.2.0-83-generic 3.2.0-83.120
To update your system, please follow these instructions: http://ift.tt/17VXqjU.
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
from Ubuntu Security Notices http://ift.tt/1bwdf55