USN-5741-1: Exim vulnerability

Releases

• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• exim4 - Exim is a mail transport agent

Details

It was discovered that Exim incorrectly handled certain regular
expressions. An attacker could use this issue to cause Exim to crash,
resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 22.10

• exim4-base - 4.96-3ubuntu1.1
• exim4-daemon-heavy - 4.96-3ubuntu1.1
• exim4-daemon-light - 4.96-3ubuntu1.1

Ubuntu 22.04

• exim4-base - 4.95-4ubuntu2.2
• exim4-daemon-heavy - 4.95-4ubuntu2.2
• exim4-daemon-light - 4.95-4ubuntu2.2

Ubuntu 20.04

• exim4-base - 4.93-13ubuntu1.7
• exim4-daemon-heavy - 4.93-13ubuntu1.7
• exim4-daemon-light - 4.93-13ubuntu1.7

Ubuntu 18.04

• exim4-base - 4.90.1-1ubuntu1.10
• exim4-daemon-heavy - 4.90.1-1ubuntu1.10
• exim4-daemon-light - 4.90.1-1ubuntu1.10

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

References

• CVE-2022-3559