Ivalid ACL parsing in ACL plugin. Privilege escalations.
CVE:
CVE-2008-4578 (The ACL plugin in Dovecot before 1.1.4 allows attackers to bypass intended access restrictions by using the "k" right to create unauthorized "parent/child/child" mailboxes.)
CVE-2008-4577 (The ACL plugin in Dovecot before 1.1.4 treats negative access rights as if they are positive access rights, which allows attackers to bypass intended access restrictions.)