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Tenable Nessus Agent <= 8.2.5 Privilege Escalation (TNS-2021-13)

high Nessus Plugin ID 151134

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Synopsis

An instance of Nessus Agent installed on the remote system is affected by a privilege escalation vulnerability.

Description

According to its self-reported version, the Tenable Nessus agent running on the remote host is prior or equal to 8.2.5. It is, therefore, affected by a privilege escalation vulnerability which could allow a Nessus administrator user to upload a specially crafted file that could lead to gaining administrator privileges on the Nessus host.

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 8.3.0 or later.

See Also

https://www.tenable.com/security/tns-2021-13

Plugin Details

Severity: High

ID: 151134

File Name: tenable_nessus_agent_tns_2021_13.nasl

Version: 1.8

Type: local

Agent: windows, macosx, unix

Family: Misc.

Published: 6/29/2021

Updated: 12/1/2023

Configuration: Enable thorough checks

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Continuous Assessment, Nessus

Risk Information

CVSS Score Rationale: Score based on analysis of the vendor advisory.

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: manual

CVSS v3

Risk Factor: High

Base Score: 7.7

Temporal Score: 6.9

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:tenable:nessus_agent

Required KB Items: installed_sw/Tenable Nessus Agent

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/29/2021

Vulnerability Publication Date: 6/29/2021

Reference Information

CVE: CVE-2021-20106

IAVB: 2021-B-0039-S