#VU75418 Improper access control in PaperCut NG and PaperCut MF - CVE-2023-27350

Vulnerability identifier: #VU75418

Vulnerability risk: Critical

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2023-27350

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
PaperCut NG
Other software / Other software solutions
PaperCut MF
Other software / Other software solutions

Vendor: PaperCut Software

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions within the SetupCompleted class. A remote non-authenticated attacker can bypass authentication process and execute arbitrary code with SYSTEM privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PaperCut NG: before 20.1.7, 21.2.11, 22.0.9, 20.1.7, 20.1.7, 20.1.7

PaperCut MF: before 20.1.7, 21.2.11, 22.0.9, 20.1.7, 20.1.7, 20.1.7

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External links
https://www.papercut.com/kb/Main/PO-1216-and-PO-1219
https://www.zerodayinitiative.com/advisories/ZDI-23-233/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.