Deprecated SSHv1 Protocol Detection CVE-2001-1473 Scanner

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Deprecated SSHv1 Protocol Detection CVE-2001-1473 Scanner Detail

A design flaw in the SSH-1 protocol allows a malicious server to establish two concurrent sessions with the same session ID, allowing a man-in-the-middle attack.

The SSH-1 protocol allows remote servers conduct man-in-the-middle attacks and replay a client challenge response to a target server by creating a Session ID that matches the Session ID of the target, but which uses a public key pair that is weaker than the target's public key, which allows the attacker to compute the corresponding private key and use the target's Session ID with the compromised key pair to masquerade as the target.

Some Advice for Common Problems

Upgrade to SSH-2, which is not vulnerable to this attack.

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