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AUSCERT External Security Bulletin Redistribution
ESB-2021.2142
Nessus 8.15.0 Fixes Multiple Vulnerabilities
16 June 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Nessus
Publisher: Tenable
Operating System: Windows
Impact/Access: Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-20100 CVE-2021-20099 CVE-2019-16168
CVE-2019-15903 CVE-2018-20843
Reference: ASB-2020.0028
ASB-2019.0308
ESB-2021.1679
ESB-2021.1191
ESB-2021.0864
Original Bulletin:
https://www.tenable.com/security/tns-2021-11
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Nessus 8.15.0 Fixes Multiple Vulnerabilities
High
Synopsis
Nessus versions 8.14.0 and earlier for Windows were found to contain multiple
local privilege escalation vulnerabilities which could allow an authenticated,
local administrator to run specific Windows executables as the Nessus host.
Additionally, two third-party components (expat, sqlite) were found to contain
vulnerabilities, and updated versions have been made available by the
providers.
Out of caution, and in line with best practice, Tenable has implemented fixes
for the privilege escalation vulnerabilities, as well as upgraded the bundled
third-party components to address the potential impact of these issues. Nessus
8.15.0 addresses the privilege escalation issues, updates expat to version
2.2.10 and sqlite to version 3.34.1.
Solution
Tenable has released Nessus 8.15.0 to address these issues. The installation
files can be obtained from the Tenable Downloads Portal ( https://
www.tenable.com/downloads/nessus ).
Additional References
https://docs.tenable.com/releasenotes/Content/nessus/nessus8150.htm
https://docs.tenable.com/Nessus.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-2018-20843
CVE-2019-15903
CVE-2019-16168
CVE-2021-20099
CVE-2021-20100
Tenable Advisory ID:
TNS-2021-11
Credit:
Lasse Trolle Borup, Mandiant - CVE-2021-20099
Phillip Castellanos, Information Security Office, The University of Texas at
Austin - CVE-2021-20100
Risk Factor:
High
CVSSv3 Base / Temporal Score:
7.5 / 6.5 (CVE-2018-20843)
7.5 / 6.5 (CVE-2019-15903)
6.5 / 5.7 (CVE-2019-16168)
7.8 / 6.8 (CVE-2021-20099)
7.8 / 6.8 (CVE-2021-20100)
CVSSv3 Vector:
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C (CVE-2018-20843)
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C (CVE-2019-15903)
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C (CVE-2019-16168)
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C (CVE-2021-20099)
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C (CVE-2021-20100)
Affected Products
Nessus 8.14.0 and earlier
Advisory Timeline
2021-06-15 - [R1] Initial Release
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