| Severity |
|
| Remote |
|
| Type |
| - |
Unknown |
| + |
Information disclosure |
|
| Description |
| + |
OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. |
|
| References |
| + |
https://utcc.utoronto.ca/~cks/space/blog/tech/SSHKeysAreInfoLeak |
| + |
https://rushter.com/blog/public-ssh-keys/ |
| + |
https://github.com/openssh/openssh-portable/blob/d0fffc88c8fe90c1815c6f4097bc8cbcabc0f3dd/auth2-pubkey.c#L261-L265 |
| + |
https://github.com/openssh/openssh-portable/pull/270 |
|
| Notes |
|