Gamespy cd-key validation system allows remote attackers to cause a denial of service (cd-key already in use) by capturing and replaying a cd-key authorization session.

GameSpy SDK CD-Key Validation Toolkit, as used by many online games, allows remote attackers to bypass the CD key validation by sending a spoofed \disc\ command, which tells the server the CD key is no longer in use.

Roger Wilco 1.4.1.6 and earlier or Roger Wilco Base Station 0.30a and earlier allows remote attackers to cause a denial of service (application crash) via a long, malformed UDP datagram.

The client and server for Roger Wilco 1.4.1.6 and earlier or Roger Wilco Base Station 0.30a and earlier report sensitive information such as IDs and source IP addresses, which allows remote attackers to obtain sensitive information.

Multiple GameSpy 3D 2.62 compatible gaming servers generate very large UDP responses to small requests, which allows remote attackers to use the servers as an amplifier in DDoS attacks with spoofed UDP query packets, as demonstrated using Battlefield 1942.

Buffer overflow in RogerWilco graphical server 1.4.1.6 and earlier, dedicated server 0.32a and earlier for Windows, and 0.27 and earlier for Linux and BSD, allows remote attackers to cause a denial of service and execute arbitrary code via a client request with a large length value.

Directory traversal vulnerability in GSAPAK.EXE for GameSpy Arcade, possibly versions before 1.3e, allows remote attackers to overwrite arbitrary files and execute arbitrary code via .. (dot dot) sequences in filenames in a .APK (Zip) file.