MS07-063 – The case of the insecure signature

MS07-063 – The case of the insecure signature

MS07-063 addresses a weakness in the SMBv2 message signing algorithm. SMB signing is a feature enabled by default on domain controllers to prevent man-in-the-middle attacks. As you can imagine, if an attacker on your local subnet can tamper with the SMB network traffic between your domain controller and domain-joined clients, they can cause all kind of mayhem.