Summaryinfo

A vulnerability, which was classified as problematic, was found in Barracuda Firewall 6.1.0.016. Affected is an unknown function of the component Access Rule Management Page. The manipulation of the argument Source with the input %20"><iframe onload=prompt(/POC/) src=x></iframe> results in cross site scripting. The attack can be launched remotely. Moreover, an exploit is present. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in Barracuda Firewall 6.1.0.016 (Firewall Software). It has been classified as problematic. Affected is some unknown functionality of the component Access Rule Management Page. The manipulation of the argument Source with the input value %20"><iframe onload=prompt(/POC/) src=x></iframe> leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity.

The weakness was disclosed 02/25/2014 by Ateeq ur Rehman Khan as Barracuda Networks Firewall Bug Bounty #32 as confirmed advisory (Packetstorm). The advisory is available at packetstormsecurity.com. The public release has been coordinated in cooperation with the vendor. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details and a public exploit are known. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

A public exploit has been developed by Ateeq ur Rehman Khan in HTML/Javascript and been published immediately after the advisory. The exploit is shared for download at packetstormsecurity.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 142 days. During that time the estimated underground price was around $0-$5k.

Applying a patch is able to eliminate this problem. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (91496). The entries VDB-12466 and VDB-12463 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Firewall Software

Vendor

• Barracuda

Name

• Firewall

Version

• 6.1.0.016

License

• commercial

Website

• Vendor: https://www.barracuda.com/

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