1. Ubuntu Security Notices
  2. USN-4580-1

USN-4580-1: Linux kernel vulnerability

Publication date

14 October 2020

Overview

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

Releases

Packages

Details

Hadar Manor discovered that the DCCP protocol implementation in the Linux
kernel improperly handled socket reuse, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code.

Hadar Manor discovered that the DCCP protocol implementation in the Linux
kernel improperly handled socket reuse, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code.

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
14.04 trusty linux-image-server –  3.13.0.182.191
linux-image-generic-pae –  3.13.0.182.191
linux-image-lowlatency-pae –  3.13.0.182.191
linux-image-virtual –  3.13.0.182.191
linux-image-omap –  3.13.0.182.191
linux-image-generic –  3.13.0.182.191
linux-image-3.13.0-182-generic –  3.13.0-182.233
linux-image-highbank –  3.13.0.182.191
linux-image-3.13.0-182-generic-lpae –  3.13.0-182.233
linux-image-3.13.0-182-lowlatency –  3.13.0-182.233
linux-image-generic-lpae –  3.13.0.182.191
linux-image-lowlatency –  3.13.0.182.191
12.04 precise linux-image-3.2.0-149-virtual –  3.2.0-149.196
linux-image-3.13.0-182-lowlatency –  3.13.0-182.233~12.04.1
linux-image-3.2.0-149-omap –  3.2.0-149.196
linux-image-generic –  3.2.0.149.163
linux-image-3.13.0-182-generic –  3.13.0-182.233~12.04.1
linux-image-highbank –  3.2.0.149.163
linux-image-server –  3.2.0.149.163
linux-image-generic-lpae-lts-trusty –  3.13.0.182.168
linux-image-virtual –  3.2.0.149.163
linux-image-generic-lts-trusty –  3.13.0.182.168
linux-image-generic-pae –  3.2.0.149.163
linux-image-3.13.0-182-generic-lpae –  3.13.0-182.233~12.04.1
linux-image-3.2.0-149-generic-pae –  3.2.0-149.196
linux-image-3.2.0-149-highbank –  3.2.0-149.196
linux-image-3.2.0-149-generic –  3.2.0-149.196

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References

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