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                             CERT-Renater

                 Note d'Information No. 2021/VULN141
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DATE                : 05/03/2021

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Systems running Tenable.sc versions 5.13.0 up to
                                 and including 5.17.0.

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https://www.tenable.com/security/tns-2021-03
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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-202102.1 Patch
2. CVE-2021-23840, CVE-2021-23841 - SC-202102.2 Patch


Additional References

https://docs.tenable.com/releasenotes/Content/tenablesc/tenablesc2021021.htm
https://docs.tenable.com/releasenotes/Content/tenablesc/tenablesc2021022.htm

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


Risk Information

CVE ID: CVE-2021-20076
CVE-2021-23840
CVE-2021-23841
Tenable Advisory ID:
TNS-2021-03
Credit:
Nicolas Verdier from TEHTRIS - CVE-2021-20076
Risk Factor:
High
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


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+ CERT-RENATER       |    tel : 01-53-94-20-44          +
+ 23/25 Rue Daviel   |    fax : 01-53-94-20-41          +
+ 75013 Paris        |    email:cert@support.renater.fr +
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