[SA14057] UW-imapd CRAM-MD5 Authentication Bypass Vulnerability

2005-01-28T00:00:00
ID SECURITYVULNS:DOC:7706
Type securityvulns
Reporter Securityvulns
Modified 2005-01-28T00:00:00

Description

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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