Re: HTB22997: XSS in A Really Simple Chat (ARSC)

[Henri Salo <henri () nerv fi>]

On Wed, Jun 01, 2011 at 02:10:31PM +0200, advisory () htbridge ch wrote:
> Vulnerability ID: HTB22997
> Reference: http://www.htbridge.ch/advisory/xss_in_a_really_simple_chat_arsc.html
> Product: A Really Simple Chat (ARSC)
> Vendor: http://www.reallysimplechat.org/ ( http://www.reallysimplechat.org/ ) 
> Vulnerable Version: 3.3-rc2
> Vendor Notification: 12 May 2011 
> Vulnerability Type: XSS (Cross Site Scripting)
> Risk level: Medium 
> Credit: High-Tech Bridge SA Security Research Lab ( http://www.htbridge.ch/advisory/ ) 
>
> Vulnerability Details:
> User can execute arbitrary JavaScript code within the vulnerable application.
> The vulnerability exists due to failure in the "dereferer.php" script to properly sanitize user-supplied input in 
> "arsc_link" variable.
> Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based 
> auwhentication credentials, disclosure or modification of sensitive data.
> The following PoC is available:
>
> http://[host]/base/dereferer.php?arsc_link=%22%3E%3Cscript%3Ealert%28document.cookie%29;%3C/script%3E

This can be refered as CVE-2011-2180. Could you please update your www-site advisory?

Best regards,
Henri Salo

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