CVE-2023-39469: papercut mf Code Injection — Fix

Description

PaperCut NG External User Lookup Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of PaperCut NG. Authentication is required to exploit this vulnerability. The specific flaw exists within the External User Lookup functionality. The issue results from the lack of proper validation of a user-supplied string before using it to execute Java code. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-21013.

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CVSS v3.1 Score

7.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-94 CWE-94

Affected Products

Vendor	Product	Versions
papercut	papercut_mf	< 22.1.1
papercut	papercut_ng	< 22.1.1

References

Advisories & Patches

https://www.papercut.com/kb/Main/SecurityBulletinJuly2023/ https://www.papercut.com/kb/Main/SecurityBulletinJuly2023/

Other References

https://www.zerodayinitiative.com/advisories/ZDI-23-1285/ https://www.zerodayinitiative.com/advisories/ZDI-23-1285/

Frequently Asked Questions

What is CVE-2023-39469? +

PaperCut NG External User Lookup Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of PaperCut NG. Authentication is required to exploit this vulnerability. The specific flaw exists within the External User Lookup functionality. The issue results from the lack of proper validation of a user-supplied string before using it to execute Java code. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-21013. It has a CVSS v3.1 base score of 7.2 (HIGH).

How severe is CVE-2023-39469? +

CVE-2023-39469 has a CVSS v3.1 score of 7.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-39469? +

CVE-2023-39469 affects products from papercut, specifically: papercut_mf, papercut_ng. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-39469? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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