USN-3499-1: Exim vulnerability

Releases

• Ubuntu 17.10
• Ubuntu 17.04

Packages

• exim4 - Exim is a mail transport agent

Details

It was discovered that Exim incorrectly handled certain BDAT data headers.
A remote attacker could possibly use this issue to cause Exim to crash,
resulting in a denial of service.

Update instructions

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

Ubuntu 17.10

• exim4-daemon-heavy - 4.89-5ubuntu1.2
• exim4-daemon-light - 4.89-5ubuntu1.2

Ubuntu 17.04

• exim4-daemon-heavy - 4.88-5ubuntu1.3
• exim4-daemon-light - 4.88-5ubuntu1.3

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

References

• CVE-2017-16944