An issue was discovered in OpenSSH before 8.9. If a client is using public-key authentication with agent forwarding but without -oLogLevel=verbose, and an attacker has silently modified the server to support the None authentication option, then the user cannot determine whether FIDO authentication is going to confirm that the user wishes to connect to that server, or that the user wishes to allow that server to connect to a different server on the user's behalf. NOTE: the vendor's position is "this is not an authentication bypass, since nothing is being bypassed.
References
Link | Resource |
---|---|
https://bugzilla.mindrot.org/show_bug.cgi?id=3316 | Issue Tracking Third Party Advisory |
https://docs.ssh-mitm.at/trivialauth.html | Third Party Advisory |
https://github.com/openssh/openssh-portable/pull/258 | Patch Third Party Advisory |
https://security-tracker.debian.org/tracker/CVE-2021-36368 | Third Party Advisory |
https://www.openssh.com/security.html | Vendor Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: mitre
Published: 2022-03-12T23:24:35
Updated: 2022-04-12T14:45:45
Reserved: 2021-07-09T00:00:00
Link: CVE-2021-36368
JSON object: View
NVD Information
Status : Modified
Published: 2022-03-13T00:15:07.937
Modified: 2024-05-17T01:58:53.237
Link: CVE-2021-36368
JSON object: View
Redhat Information
No data.
CWE