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.
Published: 2023-03-17
CVSS: 9.8
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Download CVE-2023-28531 POC (Proof-of-Concept) here:
Tip: Download official Tor Browser at https://www.torproject.org/download/ to access .onion links.
https://connollyfinan.ie/poc-88-cve-2023-23392/
https://connollyfinan.ie/poc-162-cve-2021-40449/
https://connollyfinan.ie/poc-191-cve-2025-24132/