cve/2006/CVE-2006-0805.md

### [CVE-2006-0805](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0805)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

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.

### POC

#### Reference
- http://securityreason.com/securityalert/455
- http://www.waraxe.us/advisory-45.html

#### Github
No PoCs found on GitHub currently.