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USN-4667-1: APT vulnerability

9 December 2020

APT could be made to crash or stop responding if it opened a specially crafted file.



  • apt - Advanced front-end for dpkg


Kevin Backhouse discovered that APT incorrectly handled certain packages.
A local attacker could possibly use this issue to cause APT to crash or
stop responding, resulting in a denial of service.

Update instructions

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

Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

In general, a standard system update will make all the necessary changes.


Related notices

  • USN-4667-2: apt, apt-doc, apt-transport-https, libapt-inst1.5, libapt-pkg-dev, libapt-pkg4.12, libapt-pkg-doc, apt-utils