CVE-2023-27350

PaperCut MF/NG Improper Access Control Vulnerability

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

*SSVC

Descriptions

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.

This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG. 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.

PaperCut NG/MG version 22.0.4 suffers from an authentication bypass vulnerability.

PaperCut MF/NG contains an improper access control vulnerability within the SetupCompleted class that allows authentication bypass and code execution in the context of system.

*Credits: Anonymous

CVSS Scores

NISTv3.1 9.8

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-02-28 CVE Reserved
2023-03-13 First Exploit
2023-03-14 CVE Published
2023-04-21 Exploited in Wild
2023-05-12 KEV Due Date
2024-08-02 CVE Updated
2024-09-17 EPSS Updated

CWE

CWE-284: Improper Access Control

CAPEC

References (21)

URL	Tag	Source
http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html	Third Party Advisory
https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet	Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-23-233	Third Party Advisory
https://www.horizon3.ai/papercut-cve-2023-27350-deep-dive-and-indicators-of-compromise
https://www.bleepingcomputer.com/news/security/hackers-actively-exploit-critical-rce-bug-in-papercut-servers
https://www.huntress.com/blog/critical-vulnerabilities-in-papercut-print-management-software

URL	Date	SRC
https://github.com/horizon3ai/CVE-2023-27350	2023-04-25
https://www.exploit-db.com/exploits/51391	2023-04-25
https://www.exploit-db.com/exploits/51452	2023-05-23
https://github.com/adhikara13/CVE-2023-27350	2023-04-25
https://github.com/imancybersecurity/CVE-2023-27350-POC	2023-04-22
https://github.com/ThatNotEasy/CVE-2023-27350	2023-07-24
https://github.com/Jenderal92/CVE-2023-27350	2023-06-13
https://github.com/MaanVader/CVE-2023-27350-POC	2023-05-12
https://github.com/ASG-CASTLE/CVE-2023-27350	2024-04-19
https://github.com/rasan2001/CVE-2023-27350-Ongoing-Exploitation-of-PaperCut-Remote-Code-Execution-Vulnerability	2024-05-10
http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html	2024-08-02
http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html	2024-08-02
http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html	2024-08-02
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/papercut_ng_auth_bypass.rb	2023-03-13

URL	Date	SRC

URL	Date	SRC
https://www.papercut.com/kb/Main/PO-1216-and-PO-1219	2023-03-13

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Papercut Search vendor "Papercut"		Papercut Mf Search vendor "Papercut" for product "Papercut Mf"				>= 8.0.0 < 20.1.7 Search vendor "Papercut" for product "Papercut Mf" and version " >= 8.0.0 < 20.1.7"		-		Affected
Papercut Search vendor "Papercut"		Papercut Mf Search vendor "Papercut" for product "Papercut Mf"				>= 21.0.0 < 21.2.11 Search vendor "Papercut" for product "Papercut Mf" and version " >= 21.0.0 < 21.2.11"		-		Affected
Papercut Search vendor "Papercut"		Papercut Mf Search vendor "Papercut" for product "Papercut Mf"				>= 22.0.0 < 22.0.9 Search vendor "Papercut" for product "Papercut Mf" and version " >= 22.0.0 < 22.0.9"		-		Affected
Papercut Search vendor "Papercut"		Papercut Ng Search vendor "Papercut" for product "Papercut Ng"				>= 8.0.0 < 20.1.7 Search vendor "Papercut" for product "Papercut Ng" and version " >= 8.0.0 < 20.1.7"		-		Affected
Papercut Search vendor "Papercut"		Papercut Ng Search vendor "Papercut" for product "Papercut Ng"				>= 21.0.0 < 21.2.11 Search vendor "Papercut" for product "Papercut Ng" and version " >= 21.0.0 < 21.2.11"		-		Affected
Papercut Search vendor "Papercut"		Papercut Ng Search vendor "Papercut" for product "Papercut Ng"				>= 22.0.0 < 22.0.9 Search vendor "Papercut" for product "Papercut Ng" and version " >= 22.0.0 < 22.0.9"		-		Affected