CVE-2021-36368

Public on 2022-03-13
Modified on 2024-10-30
Description
** DISPUTED ** 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."
Severity
Low severity
Low
CVSS v3 Base Score
3.7
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 1 openssh No Fix Planned
Amazon Linux 2 - Core openssh No Fix Planned

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD CVSSv2 2.6 AV:N/AC:H/Au:N/C:P/I:N/A:N
NVD CVSSv3 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N