USN-2597-1: Linux kernel (Trusty HWE) vulnerability

Releases

• Ubuntu 12.04

Packages

• linux-lts-trusty - Linux hardware enablement kernel from Trusty

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 versions:

Ubuntu 12.04

• linux-image-3.13.0-52-generic - 3.13.0-52.85~precise1
• linux-image-3.13.0-52-generic-lpae - 3.13.0-52.85~precise1

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

• CVE-2015-3339

Related notices

• USN-2600-1
• USN-2598-1
• USN-2612-1
• USN-2596-1
• USN-2583-1
• USN-2599-1
• USN-2584-1
• USN-2601-1