The remote host is missing an update to the system as announced in the referenced advisory.

Update your system with the appropriate patches or software upgrades.

The following package is affected: dovecot 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. 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.