Linksys WRT54G UPnP AddPortMapping security bypass
| linksys-upnp-security-bypass (26707) |  Low Risk |
Description:
The Linksys WRT54G Wireless-G Broadband Router could allow a remote attacker to bypass security restrictions and forward arbitrary traffic, caused by a vulnerability in the Universal Plug and Play (UPnP) service. An attacker could exploit this vulnerability by sending a specially-crafted AddPortMapping request with an invalid 'InternalClient' parameter.
Platforms Affected:
- Linksys, WRT54G v5 prior to 1.00.9
Remedy:
Upgrade to the latest firmware version (1.00.9 or later), available from the Linksys Web site. See References.
Consequences:
Bypass Security
References:
- LInksys Web site, Linksys.com Downloads/Firmware at http://www.linksys.com/servlet/Satellite?c=L_Download_C2&childpagename=US%2FLayout&cid=1115417109974&packedargs=sku%3D1127782957298&pagename=Linksys%2FCommon%2FVisitorWrapper.
- Securityview Web site, How does the UPnP flaw works at http://www.securityview.org/how-does-the-upnp-flaw-works.html.
- CVE-2006-2559: Linksys WRT54G Wireless-G Broadband Router allows remote attackers to bypass access restrictions and conduct unauthorized operations via a UPnP request with a modified InternalClient parameter, which is not validated, as demonstrated by using AddPortMapping to forward arbitrary traffic.
- FrSIRT/ADV-2006-1909: Linksys WRT54G UPnP AddPortMapping Requests Port Mapping Vulnerability
- SA20161: Linksys WRT54G UPnP Port Mapping Vulnerability
- SECTRACK ID: 1016134: Linksys WRT54GS UPnP Bug Lets Remote Internal Users Cause Packets to Be Forwarded to External Systems
Reported:
May 22, 2006
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