CVE-2023-51384

Name: CVE-2023-51384
Creator: NVD / NIST
Published: 2023-12-18T19:15:08.72+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2023-51384 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In ssh-agent in OpenSSH before 9.6, certain destination constraints can be incompletely applied. When destination constraints are specified during addition of PKCS#11-hosted private keys, these constraints are only applied to the first key, even if a PKCS#11 token returns multiple keys.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

In ssh-agent in OpenSSH before 9.6, certain destination constraints can be incompletely applied. When destination constraints are specified during addition of PKCS#11-hosted private keys, these constraints are only applied to the first key, even if a PKCS#11 token returns multiple keys.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.43%

34.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Openbsd	Openssh	>= 8.9, < 9.6
Debian	Debian Linux	11.0
Debian	Debian Linux	12.0

References

http://seclists.org/fulldisclosure/2024/Mar/21Mailing List, Third Party Advisory
https://github.com/openssh/openssh-portable/commit/881d9c6af9da4257c69c327c4e2f1508b2fa754bPatch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20240105-0005/Third Party Advisory
https://support.apple.com/kb/HT214084Third Party Advisory
https://www.debian.org/security/2023/dsa-5586Third Party Advisory
https://www.openssh.com/txt/release-9.6Release Notes
https://www.openwall.com/lists/oss-security/2023/12/18/2Mailing List, Release Notes
http://seclists.org/fulldisclosure/2024/Mar/21Mailing List, Third Party Advisory
https://github.com/openssh/openssh-portable/commit/881d9c6af9da4257c69c327c4e2f1508b2fa754bPatch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20240105-0005/Third Party Advisory
https://support.apple.com/kb/HT214084Third Party Advisory
https://www.debian.org/security/2023/dsa-5586Third Party Advisory
https://www.openssh.com/txt/release-9.6Release Notes
https://www.openwall.com/lists/oss-security/2023/12/18/2Mailing List, Release Notes
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
https://cert-portal.siemens.com/productcert/html/ssa-769027.html
https://cert-portal.siemens.com/productcert/html/ssa-794697.html

Timeline

Published: Dec 18, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-51384?

How severe is CVE-2023-51384?

CVE-2023-51384 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2023-51384?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-51384?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST