bugtraq - Re: Re: Vulnerability in CB Captcha for Joomla and Mambo

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date: Mon, 19 Apr 2010 17:38:20 -0600
From: none@...il.com
To: bugtraq@...urityfocus.com
Subject: Re: Re: Vulnerability in CB Captcha for Joomla and Mambo

I am 100% cretin that this is a vulnerability.   The exact problem is "Client Side Trust" in that you are expecting the client to keep its state over a security system (your captcha).   This is exploitable,  a bot can just grab a new session with each request.  You should be using a sql database to keep track of offenders based on their $_SERVER['REMOTE_ADDR'],  and nothing else. 

Further more if you build security systems you MUST be responsible for when they end up on bugtraq.