CVE-2023-27350
PaperCut MF/NG Improper Access Control Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 12 May 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SetupCompleted class. The issue results from improper access control. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-18987.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 100.00% probability · 100th percentile
- CISA KEV
- Listed 21 April 2023 · due 12 May 2023 · used in ransomware campaigns
- Weakness
- CWE-284
- Affected
- papercut/papercut mf · papercut/papercut ng
- Source
- zdi-disclosures@trendmicro.com
CISA notes
Apply updates per vendor instructions. https://www.papercut.com/kb/Main/PO-1216-and-PO-1219; https://nvd.nist.gov/vuln/detail/CVE-2023-27350
References
- http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.htmlExploit, Third Party Advisory, VDB Entry
- https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/Third Party Advisory
- https://www.papercut.com/kb/Main/PO-1216-and-PO-1219Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-23-233/Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.htmlExploit, Third Party Advisory, VDB Entry
- https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/Third Party Advisory
- https://www.papercut.com/kb/Main/PO-1216-and-PO-1219Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-23-233/Third Party Advisory, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27350US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.