Vulnerability in OpenBSD OpenSSH
CVE-2023-51384
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (34.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- OpenBSD OpenSSH
- Debian Linux — versions 11.0, 12.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openssh.com/txt/release-9.6 (Release Notes)
- www.openwall.com/lists/oss-security/2023/12/18/2 (Mailing List, Release Notes)
- github.com/openssh/openssh-portable/commit/881d9c6af9da4257c69c327c4e2f1508b2fa… (Patch, Third Party Advisory)
- DSA-5586 (vendor-advisory, Third Party Advisory)
- security.netapp.com/advisory/ntap-20240105-0005/ (Third Party Advisory)
- support.apple.com/kb/HT214084 (Third Party Advisory)
- 20240313 APPLE-SA-03-07-2024-2 macOS Sonoma 14.4 (mailing-list, Mailing List, Third Party Advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2023-51384?
- CVE-2023-51384 is a medium-severity vulnerability in OpenBSD OpenSSH, classified under Improper Access Control. CVSS score: 5.5/10. Published 2023-12-18.
- How severe is CVE-2023-51384?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2023-51384 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.