CVE-2008-3409 in Unreal Tournament 3
Summary
by MITRE
Buffer overflow in Unreal Tournament 3 1.3beta4 and earlier allows remote attackers to cause a denial of service (memory corruption and daemon crash) or possibly execute arbitrary code via a UDP packet containing a large value in a certain size field, followed by a data string of that size, aka attack 1 in ut3mendo.c.
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Analysis
by VulDB Data Team • 01/20/2025
The vulnerability identified as CVE-2008-3409 represents a critical buffer overflow flaw within Unreal Tournament 3 version 1.3beta4 and earlier iterations. This security weakness resides in the game's network protocol handling mechanism, specifically within the UDP packet processing subsystem. The vulnerability manifests when the game engine receives malformed network packets that contain oversized size fields, creating conditions where memory allocation calculations become invalid and lead to exploitable buffer overflows.
The technical implementation of this flaw involves the improper validation of size fields within UDP packets transmitted between game clients and servers. When an attacker crafts a malicious packet with an exaggerated size value in a specific field, the Unreal Tournament 3 engine attempts to allocate memory based on this malformed size parameter. This results in a buffer overflow condition where the subsequent data string of the specified size overflows into adjacent memory regions, potentially corrupting critical program structures and data. The vulnerability operates at the network protocol level, making it particularly dangerous as it can be exploited remotely without requiring local system access or authentication.
The operational impact of this vulnerability extends beyond simple denial of service conditions to potentially enable remote code execution capabilities. When exploited successfully, the buffer overflow can cause the game daemon to crash and terminate unexpectedly, resulting in service disruption for legitimate players. However, more concerning is the potential for arbitrary code execution, which would allow attackers to gain control over the affected system running the Unreal Tournament 3 server. This represents a significant security risk for game servers and can lead to complete system compromise. The vulnerability affects both client and server implementations, though exploitation is more commonly demonstrated against server instances where the attack can be amplified through network-based delivery mechanisms.
Mitigation strategies for CVE-2008-3409 should focus on immediate patching of affected Unreal Tournament 3 versions to the latest stable releases that contain proper input validation and memory management fixes. Network administrators should implement firewall rules and packet filtering to restrict UDP traffic on game ports, particularly when the vulnerability cannot be immediately patched. The implementation of intrusion detection systems capable of identifying malformed UDP packets can provide additional layers of protection. According to CWE standards, this vulnerability maps to CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which addresses heap-based buffer overflow scenarios. From an ATT&CK framework perspective, this vulnerability aligns with techniques involving remote code execution through network protocol manipulation and privilege escalation through service compromise. Organizations should also consider implementing network segmentation and monitoring protocols to detect anomalous packet sizes and traffic patterns that may indicate exploitation attempts.