Image Space rFactor 1.250 and earlier allows remote attackers to cause a denial of service (daemon crash) via (1) an ID 0x30 packet, (2) an ID 0x38 packet, and an invalid 13-bit integer in (3) an ID 0x60 packet and (4) an ID 0x68 packet; and a denial of service (UDP port block) via (5) an ID 0x20 packet and (6) an ID 0x28 packet.