CVE-2011-2600 in Windows
Summary
by MITRE
The GPU support functionality in Windows XP does not properly restrict rendering time, which allows remote attackers to cause a denial of service (system crash) via vectors involving WebGL and (1) shader programs or (2) complex 3D geometry, as demonstrated by using Mozilla Firefox or Google Chrome to visit the lots-of-polys-example.html test page in the Khronos WebGL SDK.
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Analysis
by VulDB Data Team • 01/16/2018
The vulnerability identified as CVE-2011-2600 represents a critical flaw in Windows XP's graphics processing unit support mechanism that enables remote attackers to execute denial of service attacks through web-based multimedia content. This vulnerability specifically targets the GPU acceleration capabilities that were increasingly integrated into operating systems during the early 2010s, when graphics processing units began handling more complex rendering tasks previously managed by central processing units. The flaw resides in how Windows XP processes graphics commands when executing WebGL applications, particularly when these applications utilize sophisticated shader programs or intricate 3D geometric structures that demand substantial GPU resources. The vulnerability operates through a time-based resource exhaustion mechanism where malicious web content can overwhelm the GPU rendering pipeline without proper time constraints, leading to system instability and potential crashes.
The technical implementation of this vulnerability demonstrates a failure in proper resource management within the Windows graphics subsystem, specifically in how it handles GPU execution time limits during WebGL rendering operations. When browsers such as Mozilla Firefox or Google Chrome execute WebGL content that contains either complex shader programs or extensive 3D geometry, the Windows XP operating system fails to enforce adequate time boundaries on GPU processing activities. This lack of time restriction allows attackers to submit rendering commands that consume excessive processing cycles, causing the graphics driver to become unresponsive or the entire system to crash. The vulnerability is particularly dangerous because it leverages legitimate browser functionality to execute malicious payloads that exploit the underlying GPU acceleration architecture. This issue aligns with CWE-775, which addresses improper handling of resources without time limits, and represents a classic example of how modern operating system components can become attack vectors when proper resource management controls are absent.
The operational impact of CVE-2011-2600 extends beyond simple system crashes to potentially compromise entire computing environments, particularly in enterprise settings where Windows XP systems may still be operational despite official end-of-life status. Attackers can exploit this vulnerability through web browsers without requiring any special privileges or local system access, making it a particularly attractive target for remote exploitation campaigns. The demonstration using the Khronos WebGL SDK's lots-of-polys-example.html test page illustrates how legitimate WebGL functionality can be weaponized to cause system instability, as the test page contains complex geometric structures that trigger the resource exhaustion conditions. Organizations running Windows XP systems face significant risk when these systems encounter web content that utilizes WebGL, as the vulnerability can be triggered through routine browsing activities. The attack vector operates through the standard web browsing workflow where users visit compromised websites or encounter malicious content that automatically loads WebGL-rendered graphics, making this vulnerability particularly insidious in real-world scenarios.
Mitigation strategies for CVE-2011-2600 must address both immediate protection measures and long-term architectural solutions. The most effective immediate response involves disabling GPU acceleration in web browsers when running on Windows XP systems, though this significantly impacts user experience and application performance. System administrators should implement network-level controls to filter or block access to known malicious WebGL content and establish secure browsing practices for legacy systems. The vulnerability highlights the importance of proper resource management and time-based execution limits in graphics processing subsystems, which aligns with ATT&CK technique T1499.004 for network denial of service attacks. Organizations should also consider implementing browser sandboxing mechanisms and restricting access to WebGL-enabled content on legacy systems. Long-term solutions require migrating away from unsupported Windows XP platforms to modern operating systems that have proper resource management controls and regular security updates. Additionally, developers should ensure that graphics libraries and APIs implement robust time-bound execution limits to prevent similar vulnerabilities from emerging in future implementations. The vulnerability serves as a critical reminder of how graphics processing unit acceleration features can become security risks when proper resource management controls are absent from system architectures.