In Teeworlds before 0.6.5, connection packets could be forged. There was no challenge-response involved in the connection build up. A remote attacker could send connection packets from a spoofed IP address and occupy all server slots, or even use them for a reflection attack using map download packets.
| Software | From | Fixed in |
|---|---|---|
| teeworlds / teeworlds | - | 0.6.5 |
| debian / debian_linux | 9.0 | 9.0.x |