Date: Tue, 14 Nov 2000 10:47:18 -0500 From: "admin@cgisecurity.com" <admin@CGISECURITY.COM> Subject: Cgisecurity.com advisory on dcforum To: BUGTRAQ@SECURITYFOCUS.COM The staff of cgisecurity.com have found a remote input validation error in the dcforum cgi script. NOTE: The vendor was very quick to issue a patch on this and becuase of this i decided to release it so soon after finding it. Below is a paste of the advisory. -zenomorph [Cgi Security Advisory #2] admin@cgisecurity.com DCForum Major security issues Found November 16th 2000 11:30am Vendor contacted 1:20am Vendor patch issued 1:44am Public release November 2000 Script Effected: DCForum Price: $69 Personal, $99 Commercial Versions effected: All versions of DCForum 1.0 - 6.0(Current) Platforms: UNIX, Linux, Windows NT, and Windows 2000 Vendor http://www.dcscripts.com Patch http://www.dcscripts.com/dcforum/dcfNews/124.html 1. Impact Any file can be read with the permissions of user nobody(or webserver) Posible root comprimise in /dcforum/dcboard.cgi script.Command execution is not allowed. (Read Only) This has only been tested on unix and linux versions and is unknown if windows versions are effected. 2. Damage caused It causes the deletion of dcboard.cgi if you ask it to view its own source. Cause for this is unknown as of now since I do not have the source. For the above reason I cannot release the exploit itself at this point in time. I would release it but it caused to much damage by "clicking on a link". If it simply gave you passwd file that would be one thing but it deleted a data and perhaps more not know of yet. 3. Fixes The vendor has been contacted about this serious security problem. A patch was issues within 1 hour of the finding of this hole. This vendor was quick to respond. http://www.dcscripts.com/dcforum/dcfNews/124.html Below is a copy of the vendor patch as issued on there website. ********************************PATCH************************************** 1. DCForum Security Bug!!! Nov-14-00 01:44 AM DCForum Security Alert!!! Affects all versions of DCForum. ================================== An anonymous user has reported a security alert. Please make this update as soon as possible. FIX - In dcboard.cgi and dcadmin.cgi, after $r_in = \%in; ADD $r_in->{'forum'} =~ s/\W//g; Please apply this patch as soon as possible. David Published to the Public November 2000 Copyright September 2000 Cgisecurity.com