USN-3423-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3423-1

18th September, 2017

linux vulnerability

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

  • Ubuntu 12.04 LTS

Summary

The system could be made to crash if it received specially crafted bluetooth traffic.

Software description

  • linux - Linux kernel

Details

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP configuration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash).

Update instructions

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

Ubuntu 12.04 LTS:
linux-image-powerpc-smp 3.2.0.131.145
linux-image-3.2.0-131-omap 3.2.0-131.177
linux-image-3.2.0-131-powerpc-smp 3.2.0-131.177
linux-image-generic 3.2.0.131.145
linux-image-3.2.0-131-generic-pae 3.2.0-131.177
linux-image-3.2.0-131-highbank 3.2.0-131.177
linux-image-generic-pae 3.2.0.131.145
linux-image-3.2.0-131-virtual 3.2.0-131.177
linux-image-highbank 3.2.0.131.145
linux-image-virtual 3.2.0.131.145
linux-image-powerpc64-smp 3.2.0.131.145
linux-image-3.2.0-131-generic 3.2.0-131.177
linux-image-omap 3.2.0.131.145
linux-image-3.2.0-131-powerpc64-smp 3.2.0-131.177

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

CVE-2017-1000251