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[R4] Nessus 6.9.3 Fixes Two Vulnerabilities

Medium
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Synopsis

Tenable Nessus was found to be impacted by two authenticated stored cross-site scripting (XSS) issues.

The first was via a report from Asif Balasinor, covered a reflected XSS issue that was deemed to have no risk as it could only be triggered by the authenticated user. While evaluating that report the director of the Nessus development team, Nicolas Pouvesle, discovered a different stored XSS issue. Both of these have been fixed, but only the stored XSS posed a risk. Tenable thanks Asif Balasinor for his report and prompting us to look further. (CVE-2017-5179)

The second, a stored XSS issue that requires authentication was reported to JVN/JPCERT by Toshitsugu Yoneyama. (CVE-2017-2122)

Please note that Tenable strongly recommends that Nessus be installed on a subnet that is not Internet addressable.

Solution

Tenable has released Nessus version 6.9.3 that corresponds to the supported operating systems and architectures. This version addresses the XSS issues.

To update your Nessus installation, follow these steps:

Additional References

http://static.tenable.com/prod_docs/upgrade_nessus.html#693

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

Tenable Advisory ID: TNS-2017-01
Risk Factor: Medium
Credit:
Toshitsugu Yoneyama (<a href="http://www.mbsd.jp/" target="_blank">Mitsui Bussan Secure Directions, Inc.</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 6.8.0, 6.8.1, 6.9.0, 6.9.1, 6.9.2

Disclosure Timeline

2016-12-05 - Initial reflected XSS report from Asif Balasinor
2016-12-05 - Tenable confirms receipt of report
2016-12-07- Tenable confirms the reflected XSS is a self-XSS, no risk
2016-12-07 - Tenable discovers the stored XSS
2017-01-03 - Tenable requests a CVE ID from MITRE via web form (278801)
2017-01-04 - MITRE assigns a CVE ID
2017-01-04 - Tenable releases Nessus 6.9.3

Advisory Timeline

2017-01-04 - [R1] Initial Release
2017-01-13 - [R2] Second XSS information added
2017-02-28 - [R3] Adjust CVSS for worst-case scenario (AV:A -> AV:N)
2017-04-18 - [R4] 6.9.2 shown twice for 'affected', fixed to 6.9.1, 6.9.2. Clarified CVE assignment, added additional ID.
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