Tenable Nessus Agent < 8.2.3 Multiple Vulnerabilities (TNS-2021-04)

medium Nessus Plugin ID 147895
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An instance of Nessus Agent installed on the remote system is affected by multiple vulnerabilities


Nessus Agent versions 7.2.0 through 8.2.2 were found to inadvertently capture the IAM role security token on the local host during initial linking of the Nessus Agent when installed on an Amazon EC2 instance. This could allow a privileged attacker to obtain the token.

Additionally, one third-party component (OpenSSL) was found to contain vulnerabilities, and updated versions have been made available by the provider. Nessus Agent version 8.2.3 will update OpenSSL to 1.1.1j.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Upgrade to Tenable Nessus Agent version 8.2.3 or later.

See Also


Plugin Details

Severity: Medium

ID: 147895

File Name: tenable_nessus_agent_tns_2021_04.nasl

Version: 1.5

Type: local

Agent: windows, macosx, unix

Family: Misc.

Published: 3/19/2021

Updated: 7/2/2021

Dependencies: tenable_nessus_agent_installed_win.nbin, nessus_agent_installed_macos.nbin, nessus_agent_installed_linux.nbin

Risk Information

CVSS Score Source: CVE-2021-20077


Risk Factor: Medium

Score: 6.1


Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.9

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:tenable:nessus_agent

Required KB Items: installed_sw/Tenable Nessus Agent

Exploit Ease: No known exploits are available

Patch Publication Date: 3/18/2021

Vulnerability Publication Date: 3/18/2021

Reference Information

CVE: CVE-2021-20077, CVE-2021-23840, CVE-2021-23841

IAVB: 2021-B-0039