Vulnerability identifier: #VU25543

Vulnerability risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-8813

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Cacti
Web applications / Other software

Vendor: The Cacti Group, Inc.

Description

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

The vulnerability exists due to improper input validation in the "graph_realtime.php" file. A remote user with graph real-time privilege can execute arbitrary OS commands on the target system via shell metacharacters in a cookie.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cacti: 1.2.8

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External links
http://drive.google.com/file/d/1A8hxTyk_NgSp04zPX-23nPbsSDeyDFio/view
http://gist.github.com/mhaskar/ebe6b74c32fd0f7e1eedf1aabfd44129
http://github.com/Cacti/cacti/releases
http://shells.systems/cacti-v1-2-8-authenticated-remote-code-execution-cve-2020-8813/

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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. However, proof of concept for this vulnerability is available.