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

medium Nessus Plugin ID 147895

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Synopsis

An instance of Nessus Agent installed on the remote system is affected by multiple vulnerabilities

Description

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.

Solution

Upgrade to Tenable Nessus Agent version 8.2.3 or later.

See Also

https://www.tenable.com/security/tns-2021-04-0

Plugin Details

Severity: Medium

ID: 147895

File Name: tenable_nessus_agent_tns_2021_04.nasl

Version: 1.9

Type: local

Agent: windows, macosx, unix

Family: Misc.

Published: 3/19/2021

Updated: 12/1/2023

Configuration: Enable thorough checks

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2021-20077

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 5.8

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

Temporal Vector: CVSS:3.0/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-S