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USN-4703-1: Mutt vulnerability

25 January 2021

Mutt could be made to denial of service if it received a specially crafted email message.



  • mutt - text-based mailreader supporting MIME, GPG, PGP and threading


It was discovered that Mutt incorrectly handled certain email messages.
An attacker could possibly use this issue to cause 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.