This indicates an attack against Quake Servers.
Quake is a popular 3D multi-player computer game which can be played over network. A malicious user can attack Quake Servers, causing a Denial-of-Service (DoS) to normal users.
Any unprotected Quake Server is potentially vulnerable
An attacker can cause DoS on the victim system
Manually remove file dcd3c.c from the vulnerable machine