CVE-2006-3401 in Quake 3 Engine
Summary
by MITRE
Stack-based buffer overflow in Quake 3 Engine as used by Quake 3: Arena 1.32b and 1.32c allows remote attackers to cause a denial of service and possibly execute code via long CS_ITEMS values.
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Analysis
by VulDB Data Team • 07/06/2024
The vulnerability identified as CVE-2006-3401 represents a critical stack-based buffer overflow within the Quake 3 Engine implementation used by Quake 3: Arena versions 1.32b and 1.32c. This flaw exists in the handling of client-side items data during network communication, specifically when processing the CS_ITEMS value field. The issue stems from insufficient input validation and bounds checking within the game engine's networking code that processes player inventory and item state information. Attackers can exploit this vulnerability by crafting maliciously long CS_ITEMS values that exceed the allocated buffer space on the target system's stack memory, potentially leading to arbitrary code execution or system instability.
The technical exploitation of this buffer overflow occurs through the manipulation of network packets sent to Quake 3: Arena clients during gameplay. When the engine receives a CS_ITEMS value that exceeds the predetermined buffer size, the excess data overflows into adjacent stack memory locations, potentially overwriting critical program execution data such as return addresses, function pointers, or local variables. This overflow condition creates a scenario where an attacker can manipulate the program flow to execute malicious code with the privileges of the affected process. The vulnerability is classified as a stack-based buffer overflow under CWE-121, which specifically addresses buffer allocation and management issues in stack memory regions. The attack vector is remote, meaning that exploitation can occur without physical access to the target system, making it particularly dangerous for online gaming environments.
The operational impact of CVE-2006-3401 extends beyond simple denial of service conditions to potentially enable complete system compromise. While the primary effect manifests as a denial of service through application crashes or system instability, the buffer overflow nature suggests that sophisticated attackers could leverage this vulnerability for privilege escalation and code execution. This represents a significant concern for gaming servers and multiplayer environments where the Quake 3 Engine is deployed, as attackers could potentially gain control over game servers or compromise player systems. The vulnerability's presence in widely distributed game versions means that numerous systems could be affected, particularly those running older versions of the Quake 3: Arena client. The exploitability factor is enhanced by the fact that the affected systems are often accessible over networks and may be running with elevated privileges, especially in server environments where the game engine processes network traffic continuously.
Mitigation strategies for this vulnerability require immediate patching of affected Quake 3: Arena installations to version 1.33 or later, which includes the necessary buffer overflow protections and input validation fixes. Network administrators should implement strict input filtering and validation at network boundaries to prevent malformed CS_ITEMS values from reaching vulnerable systems. The implementation of proper bounds checking and memory management practices should be enforced throughout the application's networking code to prevent similar issues in future deployments. Security monitoring should include detection of anomalous network traffic patterns that might indicate exploitation attempts, particularly around the specific packet structures associated with CS_ITEMS processing. The vulnerability demonstrates the importance of memory safety practices in networked applications and aligns with ATT&CK techniques related to buffer overflow exploitation and remote code execution, emphasizing the need for comprehensive defensive measures including network segmentation, privilege separation, and regular security updates to protect against similar vulnerabilities in legacy gaming software.