Dovecot regression

2017-04-11T00:00:00
ID USN-3258-2
Type ubuntu
Reporter Ubuntu
Modified 2017-04-11T00:00:00

Description

USN-3258-1 intended to fix a vulnerability in Dovecot. Further investigation revealed that only Dovecot versions 2.2.26 and newer were affected by the vulnerability. Additionally, the change introduced a regression when Dovecot was configured to use the “dict” authentication database. This update reverts the change. We apologize for the inconvenience.

Original advisory details:

It was discovered that Dovecot incorrectly handled some usernames. An attacker could possibly use this issue to cause Dovecot to hang or crash, resulting in a denial of service.