Home/CVE/ssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints. The
CVE

CVE-2023-28531

ssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints. The

ssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints. The earliest affected version is 8.9.

CRITICAL · CVSS 9.8 EPSS 0.00158
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules2 YARA rules0
▤

Affected Products & Versions

4
openbsd openssh>= 8.9 and < 9.3
netapp brocade fabric operating systemall versions
netapp hci bootstrap osall versions
netapp solidfire element osall versions
◈

Sigma Hunt Rules

2
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumSuspicious OpenSSH Daemon Error
productmediumOpenSSH Server Listening On Socket
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD17 Mar 2023 · 04:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

5
siemens-csafSSA-082556
usnUSN-6560-1
siemens-csafSSA-398330
msrcCVE-2023-28531
cisa-csafcisa-csaf-csaf_files-OT-white-2025-icsa-25-162-05
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AN2UDTXEUSKFIOIYMV6JNI5VSBMYZOFT/
https://security.gentoo.org/glsa/202307-01Third Party Advisory
https://security.netapp.com/advisory/ntap-20230413-0008/Third Party Advisory
https://www.debian.org/security/2023/dsa-5586
https://www.openwall.com/lists/oss-security/2023/03/15/8Mailing ListRelease Notes
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AN2UDTXEUSKFIOIYMV6JNI5VSBMYZOFT/
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