USN-3908-2: Linux kernel (Trusty HWE) vulnerability

linux-lts-trusty vulnerability

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

Ubuntu 12.04 ESM

Summary

The system could be made to run programs as an administrator.

Software Description

linux-lts-trusty – Linux hardware enablement kernel from Trusty for Precise ESM

Details

USN-3908-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 ESM.

Jann Horn discovered a race condition in the fork() system call in the
Linux kernel. A local attacker could use this to gain access to services
that cache authorizations.

Update instructions

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

Ubuntu 12.04 ESM: linux-image-3.13.0-166-generic – 3.13.0-166.216~precise1; linux-image-3.13.0-166-generic-lpae – 3.13.0-166.216~precise1; linux-image-3.13.0-166-lowlatency – 3.13.0-166.216~precise1; linux-image-generic-lpae-lts-trusty – 3.13.0.166.156; linux-image-generic-lts-trusty – 3.13.0.166.156

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-3908-2: Linux kernel (Trusty HWE) vulnerability

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