Ubuntu Security Notice USN-6279-1

Ubuntu Security Notice 6279-1 - It was discovered that OpenSSH has an observable discrepancy leading to an information leak in the algorithm negotiation. This update mitigates the issue by tweaking the client hostkey preference ordering algorithm to prefer the default ordering if the user has a key that matches the best-preference default algorithm.

algorithm client default information issue key leak negotiation notice observable openssh security security notice ubuntu update usn