TITLE:
UW-imapd CRAM-MD5 Authentication Bypass Vulnerability

SECUNIA ADVISORY ID:
SA14057

VERIFY ADVISORY:
http://secunia.com/advisories/14057/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
UW-imapd
http://secunia.com/product/1578/

DESCRIPTION:
A vulnerability has been reported in University of Washington IMAP
server, which can be exploited by malicious people to bypass the user
authentication.

The vulnerability is caused due to a logic error in the CRAM-MD5
(Challenge-Response Authentication Mechanism with MD5) authentication
method when evaluating the conditions of successful authentication.
This can be exploited to gain access to arbitrary users' mailboxes.

Successful exploitation requires that CRAM-MD5 authentication has
been enabled (not default setting).

SOLUTION:
Update to imap-2004b or later.
ftp://ftp.cac.washington.edu/mail/imap.tar.Z

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

OTHER REFERENCES:
US-CERT VU#702777:
http://www.kb.cert.org/vuls/id/702777

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