CVE-2008-7015 in Unreal Tournament
Summary
by MITRE
Unreal engine 3, as used in Unreal Tournament 3 1.3, Frontlines: Fuel of War 1.1.1, and other products, allows remote attackers to cause a denial of service (server exit) via a packet with a large length value that triggers a memory allocation failure.
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Analysis
by VulDB Data Team • 01/20/2025
The vulnerability identified as CVE-2008-7015 represents a critical denial of service weakness within Unreal Engine 3 implementations across multiple gaming platforms including Unreal Tournament 3 version 1.3 and Frontlines: Fuel of War version 1.1.1. This flaw manifests when remote attackers craft malicious network packets containing excessively large length values that trigger memory allocation failures within the engine's networking stack. The technical nature of this vulnerability places it squarely within the category of memory corruption issues that can be exploited through malformed input data.
The core technical flaw involves the engine's insufficient validation of packet length fields during network communication processing. When a malformed packet with an abnormally large length value is received, the Unreal Engine 3 attempts to allocate memory resources proportional to this invalid length parameter. This memory allocation failure occurs because the engine does not properly sanitize or validate the length values contained within incoming network packets before attempting to process them. The vulnerability demonstrates characteristics consistent with CWE-122, heap-based buffer overflow conditions, where the system fails to properly manage memory allocation based on untrusted input data. The absence of proper bounds checking and input sanitization creates an exploitable condition where attackers can cause the target server process to terminate unexpectedly.
From an operational impact perspective, this vulnerability enables remote attackers to perform denial of service attacks against gaming servers running affected versions of Unreal Engine 3. The consequences extend beyond simple service interruption as the server exit can result in complete service unavailability for players attempting to connect or maintain gameplay sessions. This type of attack directly impacts the availability aspect of the CIA triad and can be particularly damaging in competitive gaming environments or multiplayer gaming scenarios where server stability is paramount. The vulnerability can be exploited by any remote attacker with network access to the affected server, making it a significant concern for game developers and server administrators who must maintain continuous service availability. The attack requires minimal resources and can be executed automatically, making it particularly dangerous in large-scale gaming environments.
Mitigation strategies for CVE-2008-7015 should focus on implementing robust input validation and bounds checking mechanisms within the networking components of Unreal Engine 3 implementations. System administrators should ensure that all affected products are updated to versions containing patches that properly validate packet length values before memory allocation occurs. The implementation of network monitoring tools and intrusion detection systems can help identify and block malicious packets before they reach the vulnerable engine components. Additionally, defensive programming practices including the use of secure coding standards and regular security audits should be implemented to prevent similar vulnerabilities from emerging in future versions of the engine. Organizations should also consider implementing rate limiting and connection throttling mechanisms to reduce the impact of potential attacks. The ATT&CK framework categorizes this vulnerability under network infiltration techniques where adversaries exploit software weaknesses to gain unauthorized access or cause service disruption, making it a target for both automated scanning and targeted attacks.