CVE-2004-1542 in Soldier of Fortune
Summary
by MITRE
Buffer overflow in Soldier of Fortune II 1.03 Gold and earlier allows remote attackers to cause a denial of service (server or client crash) via a long (1) query or (2) reply.
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Analysis
by VulDB Data Team • 08/10/2025
The vulnerability identified as CVE-2004-1542 represents a critical buffer overflow flaw affecting Soldier of Fortune II version 1.03 Gold and earlier iterations. This security weakness resides within the game's network communication protocols and specifically targets the handling of query and reply packets sent between clients and servers. The buffer overflow occurs when the application receives malformed network data exceeding predetermined memory boundaries, creating an exploitable condition that can be leveraged by remote attackers to disrupt service availability.
The technical implementation of this vulnerability stems from inadequate input validation mechanisms within the game's networking code. When processing network packets containing excessively long query or reply data, the software fails to properly bounds-check incoming data before copying it into fixed-size memory buffers. This fundamental flaw allows attackers to overwrite adjacent memory locations, potentially causing unpredictable behavior including application crashes, memory corruption, or complete system instability. The vulnerability manifests as a denial of service condition that affects both server and client components of the multiplayer gaming environment, making it particularly dangerous for online gaming communities that rely on stable network infrastructure.
From an operational perspective, this vulnerability presents significant risks to gaming servers and player experiences across the Soldier of Fortune II community. Attackers can exploit this weakness to repeatedly crash game servers, disrupting multiplayer sessions and potentially causing data loss for players. The remote nature of the attack means that adversaries need not be physically present or have local access to the affected systems, making it a particularly concerning issue for server administrators who must maintain continuous availability. The impact extends beyond simple service disruption as the buffer overflow could potentially be leveraged for more sophisticated attacks if the memory corruption leads to code execution vulnerabilities.
The vulnerability aligns with CWE-121, which categorizes buffer overflow conditions as a fundamental weakness in software design that occurs when data is written beyond the boundaries of a fixed-length buffer. This weakness creates opportunities for attackers to manipulate program execution flow and can be classified under the MITRE ATT&CK framework as a denial of service technique within the system service execution domain. Network-based attacks exploiting this vulnerability typically involve sending specially crafted packets containing oversized data payloads to the target system, making it difficult to distinguish legitimate gameplay traffic from malicious attack vectors.
Mitigation strategies for CVE-2004-1542 primarily focus on immediate software updates and network-level protections. The most effective solution involves upgrading to Soldier of Fortune II version 1.04 or later, which includes proper input validation and buffer size checking mechanisms. Network administrators should implement packet filtering rules to limit the size of incoming network traffic and establish monitoring systems to detect unusual traffic patterns that may indicate exploitation attempts. Additionally, deploying intrusion detection systems that can identify malformed network packets and implementing rate limiting for network connections helps reduce the risk of successful exploitation while maintaining normal gameplay functionality.