Vulnerability identifier: #VU49681

Vulnerability risk: Low

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2020-5791

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Nagios XI
Server applications / Other server solutions

Vendor: nagios.org

Description

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

The vulnerability exists due to improper input validation. A remote privileged user can pass specially crafted data to the application and execute arbitrary OS commands on the target system with privileges of the web server.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nagios XI: 5.7.0 - 5.7.3

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External links
http://packetstormsecurity.com/files/159743/Nagios-XI-5.7.3-Remote-Command-Injection.html
http://www.tenable.com/security/research/tra-2020-58

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.