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Linksys WRT54G UPnP Port Mapping Vulnerability
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Secunia Advisory:
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SA20161
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Release Date:
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2006-05-22
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Last Update:
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2006-05-26
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Popularity:
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23,332 views
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Critical:
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Less critical
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Impact:
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Security Bypass
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Where:
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From local network
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Solution Status:
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Partial Fix
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| OS: | Linksys WRT54G Wireless-G Broadband Router
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| CVE reference: | CVE-2006-2559
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Description:
Armijn Hemel has reported a vulnerability in Linksys WRT54G, which can be exploited by malicious people to bypass certain security restrictions.
The vulnerability is caused due to missing authentication of UPnP AddPortMapping requests and missing validation of the InternalClient parameter of the request. This can be exploited by hosts on the local network to configure port forwarding settings on the device to forward incoming traffic to arbitrary hosts without requiring authentication.
Successful exploitation may allow the device to be configured to forward traffic that is received on specific ports on the external interface to another host on the Internet.
Solution:
Update to firmware version 1.00.9 for WRT54Gv5.
http://www.linksys.com/servlet/Satell...ame=Linksys%2FCommon%2FVisitorWrapper
A fix is reportedly not yet available for other hardware revisions.
Provided and/or discovered by:
Armijn Hemel
Changelog:
2006-05-23: Updated "Solution Status" and "Solution" sections.
2006-05-26: Added CVE reference.
Original Advisory:
http://www.securityview.org/how-does-the-upnp-flaw-works.html
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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