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>> Linksys WRT54G UPnP AddPortMapping Requests Port Mapping Vulnerability

Title : Linksys WRT54G UPnP AddPortMapping Requests Port Mapping Vulnerability
VUPEN ID : VUPEN/ADV-2006-1909
CVE ID : CVE-2006-2559
Rated as : Low Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-05-22


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format 

A vulnerability has been identified in Linksys WRT54G Wireless-G Broadband Router, which could be exploited by attackers to bypass security restrictions. This flaw is due to an error in the UPnP service when handling AddPortMapping requests and the "InternalClient" parameter, which could be exploited by malicious attackers on the local network to forward arbitrary ports from a vulnerable device to a remote host without requiring authentication.

Affected Products

Linksys WRT54G Wireless-G Broadband Router firmware versions prior to 1.00.9

Solution

Upgrade to firmware version 1.00.9 for WRT54Gv5 :
http://www.linksys.com/download/

References

http://www.vupen.com/english/advisories/2006/1909
http://www.securityview.org/how-does-the-upnp-flaw-works.html

Credits

Vulnerability reported by Armijn Hemel

ChangeLog

2006-05-22 : Initial release

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