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[R4] Nessus 6.5.5 Fixes Multiple Vulnerabilities

Low

Synopsis

1 - CVE-2016-82000 - Two fields in the 'Host Details' section of a scan did not properly sanitize input. By importing a malicious file or scanning a compromised host returning JavaScript instead of a hostname, an attacker could introduce JavaScript that would be stored in the scan results, which could be in turn be executed within the context of the user viewing the results.

Note that this issue goes back to the Nessus UI version 2.0.0.

CVSSv2 Base/Temporal: 2.6 / 2.1 (AV:N/AC:H/Au:N/C:N/I:P/A:N/E:F/RL:OF/RC:C)

#2 - CVE-2016-82001 - When scanning a Mac OS X host using credentials, a malicious local user could trick Nessus into executing an arbitrary command as root, thus resulting into a privilege-escalation vulnerability.

Note that the following CVSSv2 score reflects the risk to the host being scanned by Nessus, not the system hosting Nessus. Since Nessus is being used as an exploit for a target host, the score does not reflect a threat to Nessus. As such, it is not being listed as the primary CVSSv2 score for this advisory.

CVSSv2 Base/Temporal: 7.6 / 4.9 (AV:N/AC:H/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C)

#3 Nessus Folder Name Stored Scripting

Charlie Svensson reported that Nessus will render script code for folder names. This was also found internally but filed as a regular bug, as the folder names only render to the user who renamed them. Since folder names are not seen across user accounts, this does not pose any risk. Regardless, this issue has been fixed.

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

Solution

Tenable has released version 6.5.5 that corresponds to the supported operating systems and architectures, which is not affected.

To update your Nessus installation, follow these steps:

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-2016-02
Credit
Carl Purvis from Security-Assessment.com [Stored XSS]
Charlie Svensson [Folder Name Self-XSS]
Risk Factor
Low
CVSSv2 Base / Temporal Score
2.6 / 2.1
CVSSv2 Vector
(AV:N/AC:H/Au:N/C:N/I:P/A:N/E:F/RL:OF/RC:C)

Affected Products

Nessus: 5.x, 6.0 - 6.5.4
Nessus Enterprise: 5.x, 6.0 - 6.5.4

Disclosure Timeline

2016-01-26 - macosx_malware_scan.nbin issue found internally by Nicholas Miles
2016-01-28 - Fixed version of macosx_malware_scan.nbin pushed to feed
2016-01-28 - Charlie Svensson reports folder name self-XSS
2016-01-28 - Tenable confirms receipt
2016-01-29 - Tenable confirms finding, determines no risk
2016-02-09 - Carl Purvis reports the stored XSS issue
2016-02-10 - Tenable confirms finding, acknowledges the report
2016-02-15 - Details published

Advisory Timeline

2016-02-15 - [R1] Initial release
2016-02-15 - [R2] Expanded affected versions
2016-11-12 - [R3] Adjusted CVSSv2 scoring
2017-02-28 - [R4] Adjust CVSS for worst-case scenario (AV:A -> AV:N)
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