Known exploited vulnerability
CVE-2023-27350
The short answer
CVE-2023-27350 affects PaperCut NG and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-04-21: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-284.
Severity
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Apr 21, 2023
Federal due date May 12, 2023
EPSS, next 30 days
100%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
NG. NVD's record lists the exact affected versions.
References
- news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/ Third Party Advisory
- www.papercut.com/kb/Main/PO-1216-and-PO-1219 Vendor Advisory
- www.zerodayinitiative.com/advisories/ZDI-23-233/ Third Party AdvisoryVDB Entry
- news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/ Third Party Advisory
- www.papercut.com/kb/Main/PO-1216-and-PO-1219 Vendor Advisory
- www.zerodayinitiative.com/advisories/ZDI-23-233/ Third Party AdvisoryVDB Entry
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27350 US Government Resource
Questions
Is CVE-2023-27350 being exploited?
Yes. CISA added CVE-2023-27350 to its Known Exploited Vulnerabilities catalog on 2023-04-21, with a federal remediation due date of 2023-05-12. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2023-27350?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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