CVE-2006-0805

The CAPTCHA functionality in php-Nuke 6.0 through 7.9 uses fixed challenge/response pairs that only vary once per day based on the User Agent (HTTP_USER_AGENT), which allows remote attackers to bypass CAPTCHA controls by fixing the User Agent, performing a valid challenge/response, then replaying that pair in the random_num and gfx_check parameters.

Date published : 2006-02-20

http://www.securityfocus.com/bid/16722

http://www.securityfocus.com/archive/1/425394/100/0/threaded