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TITLE:
Dovecot ACL Plugin Security Bypass Security Issues

SECUNIA ADVISORY ID:
SA32164

VERIFY ADVISORY:
http://secunia.com/advisories/32164/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
Dovecot 1.x
http://secunia.com/advisories/product/10191/

DESCRIPTION:
Two security issues have been reported in Dovecot, which can be
exploited by malicious users to bypass certain security
restrictions.

1) The problem is that the ACL plugin interprets negative access
rights as positive access rights, potentially giving an unprivileged
user access to restricted resources.

2) An error in the ACL plugin when imposing mailbox creation
restrictions can be exploited to create "parent/child/child"
mailboxes.

The security issues are reported in versions prior to 1.1.4.

SOLUTION:
Update to version 1.1.4.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.dovecot.org/list/dovecot-news/2008-October/000085.html

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