#VU53516 OS Command Injection in Nagios Fusion - CVE-2020-28901

Vulnerability identifier: #VU53516

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-28901

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Nagios Fusion
Server applications / SCADA systems

Vendor: nagios.org

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in the "component_dir" parameter in cmd_subsys.php. A remote authenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nagios Fusion: 4.0.0 - 4.1.8

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External links
https://skylightcyber.com/2021/05/20/13-nagios-vulnerabilities-7-will-shock-you/
https://www.nagios.com/downloads/nagios-xi/change-log/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.