OpenSSH < 7.5
Medium Nessus Plugin ID 99359
SynopsisThe SSH server running on the remote host is affected by an information disclosure vulnerability.
DescriptionAccording to its banner, the version of OpenSSH running on the remote host is prior to 7.5. It is, therefore, affected by an information disclosure vulnerability :
- An unspecified timing flaw exists in the CBC padding oracle countermeasures, within the ssh and sshd functions, that allows an unauthenticated, remote attacker to disclose potentially sensitive information.
Note that the OpenSSH client disables CBC ciphers by default. However, sshd offers them as lowest-preference options, which will be removed by default in a future release. (VulnDB 144000)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
SolutionUpgrade to OpenSSH version 7.5 or later.