SNS Vulnerability

Serendipity Freetag Plugin "tagcloud" Cross-Site Scripting Vulnerability

Description

MustLive has discovered a vulnerability in the Freetag plugin for Serendipity, which can be exploited by malicious people to conduct cross-site scripting attacks.
Input passed via the "tagcloud" parameter to plugins/serendipity_event_freetag/tagcloud.swf (when "mode" is set to "tags") is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
The vulnerability is confirmed in version 3.29. Other versions may also be affected.

Vulnerable Products

Vulnerable Software:
Freetag 3.x (plugin for Serendipity)

Solution

Update to version 3.30.

CVE

References

Serendipity:
http://blog.s9y.org/archives/234-Security-fix-for-flash-based-cloud-in-Freetag-plugin.html
MustLive:
http://websecurity.com.ua/5356/

Vulnerability Manager Detection

IPS Protection

ASQ Engine alarm	Available Since
XSS - Prevention - GET : suspicious 'iframe' tag found in URL	3.2.0
XSS - Prevention - GET : suspicious 'meta' tag found in URL	3.2.0
XSS - Prevention - GET : suspicious tag with event found in URL	3.2.0
XSS - Prevention - GET : javascript code in flash clickTAG parameter	3.2.0
XSS - Prevention - GET : suspicious 'applet' tag found in URL	3.2.0
XSS - Phishing : suspicious 'div' tag found in URL	3.2.0
XSS - Prevention - GET : suspicious 'style' attribute found in URL	3.2.0
XSS - Prevention - GET : suspicious 'img' tag found in URL	3.2.0
XSS - Phishing : suspicious 'a' tag found in URL	3.2.0
XSS - Prevention - GET : cookie access attempt using script language found in URL	3.2.0
XSS - Prevention - GET : suspicious 'embed' tag found in URL	3.2.0
XSS - Prevention - GET : suspicious 'object' tag found in URL	3.2.0
XSS - Phishing : suspicious 'form' tag found in URL	3.2.0
XSS - Prevention - GET : javascript code found in URL	3.2.0
XSS - Prevention - GET : 'script' tag in flash clickTAG parameter	3.2.0
XSS - Prevention - GET : evasion attempt using tag characters encoding in URL	3.2.0
XSS - Prevention - GET : suspicious 'style' tag found in URL	3.2.0
XSS - Phishing : suspicious 'link' tag found in URL	3.2.0
XSS - Prevention - GET : 'script' tag found in URL	3.2.0
XSS - Prevention - GET : 'location' javascript object found in URL	3.2.0
XSS - Prevention - GET : suspicious 'div' tag found in URL	3.2.0

Risk level

Low

Vulnerability First Public Report Date

2011-09-13

Target Type

Server

Possible exploit

Remote