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[R2] Stand-alone Security Patches Available for Tenable.sc versions 5.13.0 to 5.17.0

High

Synopsis

Tenable.sc and Tenable.sc Core versions 5.13.0 through 5.17.0 were found to contain a vulnerability that could allow an authenticated, unprivileged user to perform Remote Code Execution (RCE) on the Tenable.sc server via Hypertext Preprocessor unserialization.

Additionally, one third-party component (OpenSSL) was found to contain vulnerabilities, and updated versions have been made available by the providers. OpenSSL has been updated to version 1.1.1j.

Solution

Tenable has released 2 separate stand-alone patches to address the identified vulnerabilities. The installation files can be obtained from the Tenable Downloads Portal (https://www.tenable.com/downloads/tenable-sc).

1. CVE-2021-20076 - SC-202103.1 Patch
2. CVE-2021-23840, CVE-2021-23841 - SC-202102.2 Patch

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-2021-03
Risk Factor: High
Credit:
Nicolas Verdier from TEHTRIS - CVE-2021-20076
CVSSv2 Base / Temporal Score
9.0 / 7.0 (CVE-2021-20076)
5.0 / 3.9 (CVE-2021-23840)
5.0 / 3.9 (CVE-2021-23841)
CVSSv2 Vector:
(AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:OF/RC:C)(CVE-2021-20076)
(AV:N/AC:L/Au:N/C:N/I:N/A:P)(CVE-2021-23840)
(AV:N/AC:L/Au:N/C:N/I:N/A:P)(CVE-2021-23841)

Affected Products

Tenable.sc versions 5.13.0 to 5.17.0

Disclosure Timeline

2021-02-19 - Issue reported to Tenable
2021-02-20 - Issue validated
2021-03-02 - Patches released

Advisory Timeline

2021-03-02 - [R1] Initial Release
2021-03-15 - [R2] Updated Patch Package SC-202102.1 to SC-202103.1