Atstake Security Advisory A072303-2 – By sending a large request to a named pipe used by the Microsoft SQL Server, an attacker can render the service unresponsive. Under some circumstances, the host has to be restarted to recover from this situation.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/31428/a072303-2.txt
Source: https://packetstormsecurity.com/files/31428/Atstake-Security-Advisory-03-07-23.2.html