#VU78661 Path traversal in PaperCut NG - CVE-2023-39143

Vulnerability identifier: #VU78661

Vulnerability risk: High

CVSSv4.0: 6.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-39143

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PaperCut NG
Other software / Other software solutions

Vendor: PaperCut Software

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in the applications API interface. A remote non-authenticated attacker can send a specially crafted HTTP request and read or write arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PaperCut NG: 22.0.1 - 22.1.2

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External links
https://www.papercut.com/kb/Main/SecurityBulletinJuly2023/
https://www.horizon3.ai/cve-2023-39143-papercut-path-traversal-file-upload-rce-vulnerability/

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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?

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