CVE-2006-3788 in UFO2000
Summary
by MITRE
Multiple buffer overflows in multiplay.cpp in UFO2000 svn 1057 allow remote attackers to execute arbitrary code via (1) a long unit name in Net::recv_add_unit,; (2) large values to Net::recv_rules, Net::recv_select_unit, Net::recv_options, and Net::recv_unit_data; and (3) a large mapdata GEODATA structure in Net::recv_map_data.
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Analysis
by VulDB Data Team • 07/16/2019
The vulnerability described in CVE-2006-3788 represents a critical security flaw in the UFO2000 game server implementation, specifically within the multiplay.cpp file at svn revision 1057. This issue manifests as multiple buffer overflow conditions that collectively create a remote code execution vector for attackers. The vulnerability affects the network communication handling mechanisms of the game server, making it susceptible to exploitation over network connections without requiring local access or authentication. The affected components operate within the game's networking protocol implementation where client-server communications are processed and validated.
The technical implementation of this vulnerability stems from insufficient input validation and boundary checking in several network message handlers. The primary buffer overflow occurs in Net::recv_add_unit when processing unit names that exceed allocated memory boundaries, while secondary overflows affect Net::recv_rules, Net::recv_select_unit, Net::recv_options, and Net::recv_unit_data functions through improper handling of large numeric values. The most significant vector involves the GEODATA structure in Net::recv_map_data where oversized map data triggers memory corruption. These flaws represent classic buffer overflow conditions that fall under CWE-121, which specifically addresses stack-based buffer overflow vulnerabilities, and CWE-122, covering heap-based buffer overflows. The vulnerability demonstrates poor defensive programming practices where input lengths are not properly validated before memory operations occur.
The operational impact of this vulnerability is severe and far-reaching within the context of networked gaming environments. Remote attackers can exploit these conditions to execute arbitrary code on vulnerable systems, potentially leading to complete system compromise, data theft, or service disruption. The attack surface extends beyond simple game server exploitation to include potential privilege escalation and persistence mechanisms. In enterprise environments where such gaming software might be used for training or simulation purposes, this vulnerability could serve as an initial access point for broader network infiltration. The vulnerability affects the game's multiplayer functionality, making legitimate gameplay impossible while simultaneously providing attackers with code execution capabilities. This represents a direct violation of the principle of least privilege and demonstrates how network services can be weaponized for malicious purposes.
Mitigation strategies for CVE-2006-3788 require immediate implementation of input validation controls and memory management improvements. The primary solution involves implementing strict bounds checking on all network message parameters, particularly those handling string data and numeric values exceeding predefined limits. Network administrators should implement firewall rules to restrict access to game server ports and consider deploying intrusion detection systems to monitor for exploitation attempts. The software should be updated to versions that include proper memory allocation and validation routines, with code reviews conducted to identify similar patterns in other network handlers. Additionally, system hardening measures including stack protection mechanisms, address space layout randomization, and privilege separation should be implemented to reduce the potential impact of successful exploitation attempts. Organizations should also consider implementing network segmentation to isolate gaming servers from critical infrastructure components. The vulnerability serves as a reminder of the importance of secure coding practices and the necessity of thorough input validation in network-facing applications. This case study aligns with ATT&CK technique T1203, which covers exploitation for execution, and demonstrates how vulnerabilities in legacy software can continue to pose significant risks long after their initial discovery.