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

medium Nessus Plugin ID 147895
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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: 1.3

Type: local

Agent: windows, macosx, unix

Family: Misc.

Published: 3/19/2021

Updated: 3/30/2021

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

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

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

CVSS v3

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