SNS Vulnerability

Serendipity Freetag Plugin "serendipity[tagview]" Cross-Site Scripting Vulnerability

Description

Stefan Schurtz 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 "serendipity[tagview]" parameter to serendipity_admin (when "serendipity[adminModule]" is set to "event_display" and "serendipity[adminAction]" is set to "managetags") 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 3.32 or later.

CVE

References

SSCHADV2011-016:
http://www.rul3z.de/advisories/SSCHADV2011-016.txt
Freetag Plugin Changelog:
http://php-blog.cvs.sourceforge.net/viewvc/php-blog/additional_plugins/serendipity_event_freetag/ChangeLog

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 : 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 : 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

2011-09-27

Target Type

Server

Possible exploit

Remote