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Linksys WRT54G Configuration Manipulation and Request Forgery Advisory Available in Danish  Advisory Available in German 

Secunia Advisory: SA21372  
Release Date: 2006-08-07
Last Update: 2006-11-20

Critical:
Less critical
Impact: Hijacking
Manipulation of data
Where: From remote
Solution Status: Partial Fix

OS:Linksys WRT54G Wireless-G Broadband Router


CVE reference:CVE-2006-5202 (Secunia mirror)



Description:
Ginsu Rabbit has reported a vulnerability and a security issue in Linksys WRT54G, which can be exploited by malicious people to conduct cross-site request forgery attacks and manipulate the configuration.

1) An error in Security.tri caused due to missing authentication verification can be exploited to modify sensitive configuration settings (e.g. disable wireless security).

2) An error exists in the web interface caused due to the device allowing users to change the router configuration via HTTP requests without performing any validity checks to verify the user's request.

The vulnerability and the security issue have been reported in firmware version 1.00.9 on a V5 router. Other versions may also be affected.

Solution:
Filter traffic to affected devices and do not visit untrusted web sites while being logged in to the device.

Vulnerability #1 has reportedly been fixed in firmware version 1.00.10.

Provided and/or discovered by:
Ginsu Rabbit

Changelog:
2006-10-06: Added US-CERT reference.
2006-10-12: Added CVE reference.
2006-11-20: Updated "Description" section. Added information about reported version. Updated "Solution" section.

Original Advisory:
http://lists.grok.org.uk/pipermail/full-disclosure/2006-August/048495.html

Other References:
US-CERT VU#930364:
http://www.kb.cert.org/vuls/id/930364



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

5 Related Secunia Security Advisories

1. Linksys WRT54G Security Bypass Vulnerability
2. Linksys WRT54G UPnP Port Mapping Vulnerability
3. Linksys WRT54G Multiple Vulnerabilities
4. Linksys WRT54G Router Common SSL Private Key Disclosure
5. Linksys Routers Administrative Web Interface Access Security Issue


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