Two weaknesses have been reported in activeCollab, which can be exploited by malicious people to disclose sensitive information.

The weaknesses are caused due to the application displaying descriptive error messages from LDAP responses during the authentication process in public/index.php and webapps/ac/public/upgrade/execute.php. This can be exploited to enumerate valid usernames and disclose some organisation information.

Successful exploitation requires that the LDAP module is enabled (disabled by default).

The weaknesses are reported in versions 2.3.10 and prior.

Solution
Restrict access to trusted hosts only or disable the LDAP module.

Provided and/or discovered by
Andrew Horton, Steven Seeley, and Pedram Hayati, Stratsec.

Original Advisory
Stratsec:
http://www.stratsec.net/Research/Advisories/ActiveCollab-Multiple-Vulnerabilities-%28SS-2012-005

Deep Links
Links available to Secunia VIM customers