CVE-2003-1354 in GameSpy 3d
Summary
by MITRE
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.
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Analysis
by VulDB Data Team • 10/03/2024
The vulnerability described in CVE-2003-1354 represents a critical amplification flaw in gaming server software that has significant implications for network security and distributed denial-of-service attack vectors. This weakness specifically affects GameSpy 3D 2.62 compatible gaming servers, including those used by popular titles such as Battlefield 1942, where the protocol implementation fails to properly validate request sizes and response lengths. The flaw operates by exploiting the inherent design of UDP-based query protocols used in online gaming environments to generate disproportionately large responses to minimal input requests, creating a substantial amplification factor that can be exploited by malicious actors.
The technical mechanism behind this vulnerability stems from the server's failure to implement proper rate limiting and response size controls during query processing. When legitimate or malicious clients send small UDP packets to these gaming servers, the servers respond with massive UDP datagrams containing extensive game server information, player lists, and other metadata. This response amplification ratio can reach several hundred times the original request size, making the servers ideal candidates for reflection-based distributed denial-of-service attacks. The vulnerability specifically impacts servers that implement GameSpy 3D protocols, which are commonly used in first-person shooter games and other multiplayer environments where server query functionality is essential for client connection and game information retrieval.
From an operational perspective, this vulnerability creates a significant risk for game server operators and network administrators who may unknowingly become part of large-scale DDoS attacks. Attackers can spoof the source IP address of legitimate clients and send small queries to vulnerable servers, causing those servers to respond to the spoofed addresses with massive UDP packets. This creates a massive network traffic load that can overwhelm target systems and networks, effectively rendering services unavailable to legitimate users. The impact extends beyond individual game servers to potentially affect entire network infrastructures, as the amplification factor can multiply the attack traffic by orders of magnitude, making even small-scale attacks capable of causing significant disruption.
The vulnerability aligns with several cybersecurity frameworks and attack patterns, particularly those described in the MITRE ATT&CK framework under the 'Command and Control' and 'Reflection/Amplification' techniques. It also corresponds to CWE-400, which addresses 'Uncontrolled Resource Consumption', specifically in the context of network protocol implementations. Network security professionals should consider implementing several mitigation strategies including rate limiting of UDP queries, source IP address validation, response size limiting, and network-level filtering to prevent spoofed traffic from reaching vulnerable servers. Additionally, server administrators should update to patched versions of GameSpy 3D implementations, implement proper firewall rules to restrict UDP query access, and monitor for unusual traffic patterns that might indicate exploitation attempts. The vulnerability highlights the importance of proper protocol design and resource management in network services, particularly those exposed to untrusted networks where amplification attacks can be easily orchestrated.