USN-3961-1: Dovecot vulnerabilities

Releases

• Ubuntu 19.04
• Ubuntu 18.10

Packages

• dovecot - IMAP and POP3 email server

Details

It was discovered that the Dovecot Submission login service incorrectly
handled certain operations. A remote attacker could possibly use this issue
to cause Dovecot 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 19.04

• dovecot-submissiond - 1:2.3.4.1-1ubuntu2.2
• dovecot-core - 1:2.3.4.1-1ubuntu2.2

Ubuntu 18.10

• dovecot-submissiond - 1:2.3.2.1-1ubuntu3.4
• dovecot-core - 1:2.3.2.1-1ubuntu3.4

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

References

• CVE-2019-11494
• CVE-2019-11499