SNS Vulnerability

Serendipity "serendipity[filter][bp.ALT]" Cross-Site Scripting Vulnerability

Description

Stefan Schurtz has discovered a vulnerability in Serendipity, which can be exploited by malicious people to conduct cross-site scripting attacks.
Input passed to the "serendipity[filter][bp.ALT]" parameter in serendipity_admin_image_selector.php 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 1.5.5. Prior versions may also be affected.

Vulnerable Products

Vulnerable Software:
Serendipity 1.x

Solution

Update to version 1.6 or later.

CVE

CVE-2011-4090

References

Serendipity:
http://blog.s9y.org/archives/233-Serendipity-1.6-released.html
https://github.com/s9y/Serendipity/commit/1f037b462761cd592b90541ce4dfda2518ad4711
Stefan Schurtz:
http://www.rul3z.de/advisories/SSCHADV2011-015.txt

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

2011-11-03

Target Type

Server

Possible exploit

Remote