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.
Credits
Vulnerability reported by Armijn Hemel
ChangeLog
2006-05-22 : Initial release
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