USN-2598-2: Linux kernel regression

Ubuntu Security Notice USN-2598-2

8th May, 2015

linux vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 14.04 LTS


USN-2598-1 Introduced a regression in the Linux kernel.

Software description

  • linux – Linux kernel


USN-2598-1 fixed vulnerabilities in the Linux kernel, however an unrelated
regression in the auditing of some path names was introduced. Due to the
regression the system could crash under certain conditions.

This update fixes the problem.

We apologize for the inconvenience.

Original advisory 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 14.04 LTS:
linux-image-3.13.0-52-generic 3.13.0-52.86
linux-image-3.13.0-52-generic-lpae 3.13.0-52.86
linux-image-3.13.0-52-powerpc-e500 3.13.0-52.86
linux-image-3.13.0-52-lowlatency 3.13.0-52.86
linux-image-3.13.0-52-powerpc-smp 3.13.0-52.86
linux-image-3.13.0-52-powerpc-e500mc 3.13.0-52.86
linux-image-3.13.0-52-powerpc64-emb 3.13.0-52.86
linux-image-3.13.0-52-powerpc64-smp 3.13.0-52.86

To update your system, please follow these instructions:

After a standard system update you need to reboot your computer to make
all the necessary changes.


LP: 1450442

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