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USN-4934-1: Exim vulnerabilities

4 May 2021

Several security issues were fixed in Exim.



  • exim4 - Exim is a mail transport agent


It was discovered that Exim contained multiple security issues. An attacker
could use these issues to cause a denial of service, execute arbitrary
code remotely, obtain sensitive information, or escalate local privileges.

Update instructions

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

Ubuntu 21.04
Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04

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

Related notices

  • USN-4934-2: eximon4, exim4-daemon-heavy, exim4-base, exim4, exim4-config, exim4-daemon-light, exim4-dev