CVE-2023-27350
PaperCut MF/NG: Improper Access Control
As of , CVE-2023-27350 in PaperCut MF/NG is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 21 April 2023
- US federal deadline
- 12 May 202321 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Known
- EPSS score
- 0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- 0.00 on 21 April 2023EPSS on the day CISA listed it.
- Public exploit
- 1 Metasploit module and 2 Exploit-DB entries
- Fix
- Vendor advice: www.papercut.comLinks below, from CISA's entry.
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
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.
CISA's 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.
The CVE record's description, from zdi
- CVE published
- 20 April 2023
- Assigned by
- zdi
- CVSS
- 9.8 Critical (CVSS 3.0, from the CNA)
- CWE-284
- Improper Access Control
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- yes
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- Exploit-DB published an exploit (EDB-ID 51391).
- The US federal deadline to fix it.
- Exploit-DB published an exploit (EDB-ID 51452).
Public exploits
Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.
- Metasploit: PaperCut PaperCutNG Authentication Bypassexploit module, rank excellent
- Exploit-DB: PaperCut NG/MG 22.0.4 - Remote Code Execution (RCE)EDB-ID 51452, 23 May 2023
- Exploit-DB: PaperCut NG/MG 22.0.4 - Authentication BypassEDB-ID 51391, 25 April 2023
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org