2020-19203 | Netgate pfSense Community Edition Dashboard cross site scripting

By Max On Jul 15, 2021

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3.4	$0-$5k	0.30

A vulnerability was found in Netgate pfSense Community Edition 2.4.4-p2 on arm64 (Firewall Software). It has been classified as problematic. Affected is an unknown part of the component Dashboard. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. This is going to have an impact on integrity. An attacker might be able to inject arbitrary html and script code into the web site. This would alter the appearance and would make it possible to initiate further attacks against site visitors. CVE summarizes:

Netgate pfSense Community Edition 2.4.4 – p2 (arm64) is affected by: Cross Site Scripting (XSS). The impact is: Session Hijacking, Information Leakage (local). The component is: pfSense Dashboard, Work-on-LAN Service configuration. The attack vector is: Inject the malicious JavaScript code in Description text box or parameter.

The weakness was shared 07/12/2021. The advisory is available at docs.netgate.com. This vulnerability is traded as CVE-2020-19203 since 08/13/2020. The exploitability is told to be easy. It is possible to launch the attack remotely. A authentication is necessary for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Applying the patch 2.4.4-p3 is able to eliminate this problem. The bugfix is ready for download at docs.netgate.com.

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