A covert timing channel flaw was found in the way OpenSSH handled authentication of non-existent users. A remote unauthenticated attacker could possibly use this flaw to determine valid user names by measuring the timing of server responses.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 1 | openssh | 2017-10-03 11:00 | ALAS-2017-898 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv2 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Amazon Linux | CVSSv3 | 5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
NVD | CVSSv2 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
NVD | CVSSv3 | 5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |