A vulnerability has been reported in Dovecot, which can be exploited by malicious people to bypass certain security restrictions.

The vulnerability is caused due to an error when processing passwords. This can be exploited to set values for internally processed fields via a specially crafted password containing TAB characters.

Successful exploitation allows to log in without valid user credentials.

The vulnerability is reported in versions prior to 1.0.13 and 1.1.rc3.

NOTE: This affects only blocking passdbs (see vendor advisory for details).

Solution
Update to version 1.0.13.
Further details available to Secunia VIM customers

Provided and/or discovered by
Reported by the vendor.

Changelog
Further details available to Secunia VIM customers

Original Advisory
http://dovecot.org/list/dovecot-news/2008-March/000064.html

Deep Links
Links available to Secunia VIM customers