1. Ubuntu Security Notices
  2. USN-3423-1

USN-3423-1: Linux kernel vulnerability

Publication date

18 September 2017

Overview

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

Releases

Packages

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).

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

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

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
12.04 precise 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

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›