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[R3] Nessus Web UI Scanned Content Stored XSS

Medium
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Synopsis

The Nessus scanner's web-based user interface (Web UI) was vulnerable to a stored cross-site scripting (XSS) attack. The issue was due to a security control being briefly removed due to a regression error. During this 48 hour window, one new build of the Web UI was released leading to the ability to inject arbitrary script code. This could be done by setting up a malicious web server that returned a crafted host header containing JavaScript. When Nessus scanned the web server, the input would be passed as-is and render when viewing a report.

Solution

Tenable has released version 2.3.4 Build #85 of the Nessus Web UI that fixes this issue. Nessus users automatically received this fix as part of the plugin feed daily update.

Additional References

http://www.thesecurityfactory.be/permalink/nessus-stored-xss.html

This page contains information regarding security vulnerabilities that may impact Tenable's products. This may include issues specific to our software, or due to the use of third-party libraries within our software. Tenable strongly encourages users to ensure that they upgrade or apply relevant patches in a timely manner.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

CVE ID: 2014-7280
Tenable Advisory ID: TNS-2014-08
Risk Factor: Medium
Credit:
Frank Lycops <a href="http://thesecurityfactory.be/" target="_blank">The Security Factory</a>
CVSSv2 Base / Temporal Score
4.0 / 3.1
CVSSv2 Vector:
(AV:N/AC:L/Au:S/C:N/I:P/A:N/E:POC/RL:OF/RC:C)

Affected Products

Nessus: 5.x (Web UI 2.3.3 Build #83 - #84)

Disclosure Timeline

2014-06-12 - Vulnerability Mistakenly Introduced
2014-06-13 - Vulnerability Discovered by TSF
2014-06-13 - Tenable Informed
2014-06-13 - Tenable Acknowledged
2014-06-13 - Solution Released
2014-10-07 - Issue Disclosed

Advisory Timeline

2014-10-07 - [R1] Initial release
2016-11-17 - [R2] Adjust CVSSv2 score
2017-02-28 - [R3] Adjust CVSS for worst-case scenario (AV:A -> AV:N)
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