Cyrus IMAPd NNTP AUTHINFO USER Command Parsing Authentication Bypass

Medium Nessus Plugin ID 57336


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


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.


Upgrade Cyrus IMAPd to version 2.4.12 or later.

See Also

Plugin Details

Severity: Medium

ID: 57336

File Name: cyrus_imap_nntp_auth_bypass.nasl

Version: $Revision: 1.5 $

Type: remote

Family: General

Published: 2011/12/19

Modified: 2016/06/13

Dependencies: 57334

Risk Information

Risk Factor: Medium


Base Score: 6.4

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:cmu:cyrus_imap_server

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2011/10/04

Vulnerability Publication Date: 2011/10/04

Reference Information

CVE: CVE-2011-3372

BID: 49949

OSVDB: 76057