Re: CodeIgniter Global XSS Filtering Bypass Vulnerability

[T Biehn <tbiehn () gmail com>]

This is a joke, right?

-Travis

On Mon, Jul 27, 2009 at 11:53 AM, YGN Ethical Hacker Group
(http://yehg.net)<lists () yehg net> wrote:
> ========================================
>
> CodeIgniter Global XSS Filtering Bypass Vulnerability
>
> ========================================
>
> Discovered by:
> Aung Khant, YGN Ethical Hacker Group, Myanmar
> http://yehg.net/ ~ believe in full disclosure
>
> Product : CodeIgniter < http://www.codeigniter.com>
> Product Description : Open-source PHP Framework
> Pen-Tested Version : 1.5.2
> Vulnerability : User-Agent injection
> Risk : Medium
> Threat : XSS, Log File Tampering
>
> Advisory URL: http://yehg.net/lab/pr0js/view.php/CodeIgniter%20Global%20XSS%20Filtering%20Bypass%20Vulnerability.pdf
>
> Description:
> $CI->input->user_agent() fails to check the validity of user-agent type.
> It simply extracts from $_SERVER array without checking whether it is
> bad string injection or not. In this case, we can spoof user agent
> string of our browser with our arbitrary commands that can bypass
> stronger CodeIgniter Security class even if
> $config['global_xss_filtering'] = TRUE;. Thus we can execute XSS on
> the fly.
>
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
> Hosted and sponsored by Secunia - http://secunia.com/

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/