A vulnerability was found in DD-WRT 24. It has been rated as critical. This issue affects an unknown function of the file apply.cgi of the component Administration. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. Using CWE to declare the problem leads to CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Multiple cross-site request forgery (CSRF) vulnerabilities in apply.cgi in DD-WRT 24 sp1 and earlier allow remote attackers to hijack the authentication of administrators for requests that (1) execute arbitrary commands via the ping_ip parameter; (2) change the administrative credentials via the http_username and http_passwd parameters; (3) enable remote administration via the remote_management parameter; or (4) configure port forwarding via certain from, to, ip, and pro parameters.

The weakness was disclosed 08/14/2009 as confirmed posting (Bugtraq). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2008-6974 since 08/14/2009. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details as well as a public exploit are known.

A public exploit has been developed by gat3way and been published even before and not after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 25 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (9209). The entry 49428 is pretty similar.

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• DD-WRT

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• 24

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CPE 2.2info

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