Security News > 2023 > August > New PaperCut critical bug exposes unpatched servers to RCE attacks

New PaperCut critical bug exposes unpatched servers to RCE attacks
2023-08-04 20:23

PaperCut recently fixed a critical security vulnerability in its NG/MF print management software that allows unauthenticated attackers to gain remote code execution on unpatched Windows servers.

While it only impacts servers in non-default configurations where the external device integration setting is toggled, Horizon3 said in a report published on Friday that most Windows PaperCut servers have it enabled.

A Shodan search shows that roughly 1,800 PaperCut servers are currently exposed online, although not all are vulnerable to CVE-2023-39143 attacks.

PaperCut servers were targeted by several ransomware gangs earlier this year by exploiting another critical unauthenticated RCE vulnerability and a high-severity information disclosure flaw.

Microsoft linked the attacks targeting PaperCut servers to the Clop and LockBit ransomware gangs, who used the access to steal corporate data from compromised systems.

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News URL

https://www.bleepingcomputer.com/news/security/new-papercut-critical-bug-exposes-unpatched-servers-to-rce-attacks/

Related Vulnerability

DATE CVE VULNERABILITY TITLE RISK
2023-08-04 CVE-2023-39143 Path Traversal vulnerability in Papercut MF
PaperCut NG and PaperCut MF before 22.1.3 on Windows allow path traversal, enabling attackers to upload, read, or delete arbitrary files.
network
low complexity
papercut CWE-22
critical
9.8

Related vendor

VENDOR LAST 12M #/PRODUCTS LOW MEDIUM HIGH CRITICAL TOTAL VULNS
Papercut 3 0 5 4 4 13