CVE-2020-5791 : Improper neutralization of special elements used in an OS command in Nagios XI 5

Improper neutralization of special elements used in an OS command in Nagios XI 5.7.3 allows a remote, authenticated admin user to execute operating system commands with the privileges of the apache user.

Published 2020-10-20 22:15:45

Updated 2023-01-24 16:10:27

Source Tenable Network Security, Inc.

View at NVD, CVE.org

Products affected by CVE-2020-5791

Nagios » Nagios Xi
Versions from including (>=) 5.6.0 and up to, including, (<=) 5.7.3
cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2020-5791

EPSS FAQ

91.26%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 100 %

Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2020-5791

Nagios XI Scanner

First seen: 2021-03-26

auxiliary/scanner/http/nagios_xi_scanner

The module detects the version of Nagios XI applications and suggests matching exploit modules based on the version number. Since Nagios XI applications only reveal the version to authenticated users, valid credentials for a Nagios XI account are required. Al

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Nagios XI 5.6.0-5.7.3 - Mibs.php Authenticated Remote Code Exection

Disclosure Date: 2020-10-20

First seen: 2021-04-16

exploit/linux/http/nagios_xi_mibs_authenticated_rce

This module exploits CVE-2020-5791, an OS command injection vulnerability in `admin/mibs.php` that enables an authenticated user with admin privileges to achieve remote code execution as either the `apache` user or the `www-data` user on NagiosXI version 5.6.

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CVSS scores for CVE-2020-5791

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
9.0	HIGH	AV:N/AC:L/Au:S/C:C/I:C/A:C	8.0	10.0	NIST
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
7.2	HIGH	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	1.2	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: High User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2020-5791

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-5791

https://www.tenable.com/security/research/tra-2020-58

Nagios XI Multiple Vulnerabilities - Research Advisory | Tenable®
Exploit;Third Party Advisory

CVEs referencing this url
http://packetstormsecurity.com/files/159743/Nagios-XI-5.7.3-Remote-Command-Injection.html

Nagios XI 5.7.3 Remote Command Injection ≈ Packet Storm
Exploit;Third Party Advisory;VDB Entry
http://packetstormsecurity.com/files/162235/Nagios-XI-5.7.3-Remote-Code-Execution.html

Nagios XI 5.7.3 Remote Code Execution ≈ Packet Storm
Exploit;Third Party Advisory;VDB Entry

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Vulnerability Details : CVE-2020-5791