Cyrus IMAPd NNTP AUTHINFO USER Command Parsing Authentication Bypass

This script is Copyright (C) 2011 Tenable Network Security, Inc.


Synopsis :

The remote NNTP server is affected by an authentication bypass
vulnerability.

Description :

The remote NNTP server contains a logic error that causes clients
that send only a username, neglecting to send a password, to be
treated as authenticated. This may permit an unauthenticated, remote
attacker to view and post to restricted newsgroups, impersonating
other users in the process.

See also :

http://secunia.com/secunia_research/2011-68/

Solution :

Upgrade Cyrus IMAPd to version 2.4.12 or later.

Risk factor :

Medium / CVSS Base Score : 6.4
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N)
CVSS Temporal Score : 5.3
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: General

Nessus Plugin ID: 57336 ()

Bugtraq ID: 49949

CVE ID: CVE-2011-3372