CVE-2007-4534 in Vavoom
Summary
by MITRE
Buffer overflow in the VThinker::BroadcastPrintf function in p_thinker.cpp in Vavoom 1.24 and earlier allows remote attackers to execute arbitrary code via (1) a long string in a chat message and possibly (2) a long name field.
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Analysis
by VulDB Data Team • 01/26/2025
The vulnerability identified as CVE-2007-4534 represents a critical buffer overflow condition within the Vavoom game engine version 1.24 and earlier. This flaw exists in the VThinker::BroadcastPrintf function located in the p_thinker.cpp source file, which serves as a core component for handling various game communications and broadcasting mechanisms. The vulnerability manifests when the game processes incoming data through chat messages or player name fields, creating an exploitable condition that can be leveraged by remote attackers to gain unauthorized code execution privileges.
The technical implementation of this buffer overflow stems from inadequate input validation and bounds checking within the BroadcastPrintf function. When processing user-provided data, the function fails to properly verify the length of incoming strings before copying them into fixed-size buffers. This classic programming error allows attackers to overwrite adjacent memory locations, potentially corrupting the program's execution flow. The vulnerability specifically affects two data entry points: chat message inputs and player name fields, both of which are commonly used in multiplayer gaming environments where user interaction is frequent and varied. The overflow occurs because the function does not enforce maximum length constraints on user-supplied strings, enabling malicious actors to craft inputs exceeding the allocated buffer space.
The operational impact of this vulnerability extends beyond simple code execution, as it fundamentally compromises the integrity and security of the entire gaming environment. Remote attackers can leverage this flaw to inject and execute arbitrary code on vulnerable systems, potentially leading to complete system compromise. In multiplayer gaming contexts, this vulnerability becomes particularly dangerous as it can be exploited during normal gameplay without requiring special privileges or local access. The implications are severe for game servers and client systems that rely on the Vavoom engine, as successful exploitation could result in unauthorized access, data corruption, denial of service conditions, or even complete system takeover. The vulnerability's remote exploitability means that attackers need only interact with the game through normal network protocols to potentially gain control over target systems.
Mitigation strategies for CVE-2007-4534 should prioritize immediate patching of affected Vavoom installations to version 1.25 or later, where the buffer overflow has been resolved through proper input validation and bounds checking implementations. System administrators should implement network-level restrictions to limit access to affected game servers and consider deploying intrusion detection systems to monitor for exploitation attempts. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and reflects common attack patterns documented in the MITRE ATT&CK framework under the T1059.007 technique for command and scripting interpreter. Organizations should also consider implementing input sanitization measures, including character length validation, string truncation, and proper error handling mechanisms to prevent similar vulnerabilities from emerging in other components of their gaming infrastructure. Regular security assessments and code reviews should be conducted to identify and remediate potential buffer overflow conditions in legacy gaming applications and other software systems.