SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   Application (E-mail Server)  >   Cyrus IMAP Server Vendors:   Carnegie Mellon University
Cyrus IMAP Server NNTP Service Lets Remote Users Bypass Authentication
SecurityTracker Alert ID:  1026143
SecurityTracker URL:  http://securitytracker.com/id/1026143
CVE Reference:   CVE-2011-3372   (Links to External Site)
Updated:  Dec 1 2011
Original Entry Date:  Oct 5 2011
Impact:   User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): prior to 2.4.12
Description:   A vulnerability was reported in Cyrus IMAP Server. A remote user can bypass authentication.

A remote user can send an 'AUTHINFO USER' command without a subsequent 'AUTHINFO PASS' command to bypass authentication and access the NNTP server.

The vendor was notified on September 19, 2011.

Stefan Cornelius of Secunia Research reported this vulnerability.

Impact:   A remote user can bypass authentication.
Solution:   The vendor has issued a fix (2.4.12).
Vendor URL:  www.cyrusimap.org/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Dec 1 2011 (Red Hat Issues Fix) Cyrus IMAP Server NNTP Service Lets Remote Users Bypass Authentication
Red Hat has issued a fix for Red Hat Enterprise Linux 4, 5, and 6.



 Source Message Contents

Subject:  Secunia Research: Cyrus IMAPd NTTP Authentication Bypass Vulnerability

====================================================================== 

                     Secunia Research 05/10/2011

      - Cyrus IMAPd NTTP Authentication Bypass Vulnerability -

======================================================================
Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

======================================================================
1) Affected Software 

* Cyrus IMAPd 2.4.10 and 2.4.11

NOTE: Prior versions may also be affected.

======================================================================
2) Severity 

Rating: Moderately critical
Impact: Security bypass
Where:  From remote

======================================================================
3) Vendor's Description of Software 

"Cyrus is a highly scalable enterprise mail system designed for use
in enterprise environments of various sizes using standards based
technologies. Cyrus technologies scale from independent use in email
departments to a system centrally managed in a large enterprise.".

Product Link:
http://www.cyrusimap.org/

======================================================================
4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Cyrus IMAPd, which
can be exploited by malicious people to bypass certain security
restrictions.

The vulnerability is caused by an error in the authentication 
mechanism of the NNTP server. This can be exploited to bypass the 
authentication process and execute commands intended for 
authenticated users only by sending an "AUTHINFO USER" command 
without a following "AUTHINFO PASS" command.

======================================================================
5) Solution 

Update to version 2.4.12.

====================================================================== 
6) Time Table 

19/09/2011 - Vendor notified.
20/09/2011 - Vendor response.
05/10/2011 - Public disclosure.

====================================================================== 
7) Credits 

Discovered by Stefan Cornelius, Secunia Research.

====================================================================== 
8) References

The Common Vulnerabilities and Exposures (CVE) project has not yet
assigned a CVE identifier for the vulnerability.

====================================================================== 
9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private 
individuals, who are interested in or concerned about IT-security.

http://secunia.com/advisories/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the 
security and reliability of software in general:

http://secunia.com/secunia_research/

Secunia regularly hires new skilled team members. Check the URL below
to see currently vacant positions:

http://secunia.com/corporate/jobs/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/advisories/mailing_lists/

====================================================================== 
10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2011-68/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

======================================================================
 
 


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2019, SecurityGlobal.net LLC