Summaryinfo

A vulnerability classified as problematic has been found in Linksys WAG200G Firmware 1.01.06. The impacted element is an unknown function of the file setup.cgi. The manipulation of the argument policy_name leads to cross site scripting. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in Linksys WAG200G Firmware 1.01.06. It has been rated as problematic. This issue affects some unknown processing of the file setup.cgi. The manipulation of the argument policy_name with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. Impacted is integrity.

The bug was discovered 10/01/2012. The weakness was published 02/08/2013 by Michael Messner (m1k3) with s3cur1ty as m1adv2013-016 as confirmed bulletin (Website). The advisory is shared at s3cur1ty.de. The public release happened without involvement of Linksys. The exploitation is known to be easy. The attack may be initiated remotely. Required for exploitation is a simple authentication. It demands that the victim is doing some kind of user interaction. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

A public exploit has been developed by m-1-k-3 and been published immediately 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 130 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 databases at Exploit-DB (24476) and OSVDB (90076†). Similar entry is available at VDB-7686. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Linksys

Name

• WAG200G

Version

• Firmware 1.01.06

License

• commercial

Website

• Vendor: https://www.linksys.com/

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