CVE-2014-8298 in Driver
Summary
by MITRE
The NVIDIA Linux Discrete GPU drivers before R304.125, R331.x before R331.113, R340.x before R340.65, R343.x before R343.36, and R346.x before R346.22, Linux for Tegra (L4T) driver before R21.2, and Chrome OS driver before R40 allows remote attackers to cause a denial of service (segmentation fault and X server crash) or possibly execute arbitrary code via a crafted GLX indirect rendering protocol request.
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Analysis
by VulDB Data Team • 03/01/2022
The vulnerability described in CVE-2014-8298 represents a critical flaw in NVIDIA's Linux discrete GPU driver implementations that affects multiple driver versions across different platforms including standard Linux systems, Tegra-based devices, and Chrome OS environments. This security issue stems from insufficient input validation within the GLX indirect rendering protocol handling mechanism, which forms a fundamental component of OpenGL graphics rendering on Linux systems. The flaw exists in the way the GPU drivers process certain protocol requests that are typically used for indirect rendering operations, where client applications communicate with the graphics server through a series of commands that are executed on the GPU.
The technical implementation of this vulnerability manifests through improper bounds checking and validation of data structures within the GLX protocol handling code. When a malicious actor crafts a specially formatted GLX indirect rendering request, the driver fails to properly validate the incoming data, leading to memory corruption scenarios that can result in segmentation faults. This memory corruption occurs because the driver does not adequately check array bounds or pointer validity before processing the indirect rendering commands, allowing attackers to manipulate memory layout through carefully constructed protocol messages. The vulnerability is particularly dangerous because it can be exploited remotely through network-based applications that utilize OpenGL rendering, making it accessible to attackers who may not have local system access.
The operational impact of this vulnerability extends beyond simple denial of service conditions to potentially enabling arbitrary code execution on affected systems. When the segmentation fault occurs during X server processing, it can cause the entire graphics subsystem to crash, effectively rendering the system unusable for graphical operations. However, in some cases where the memory corruption is properly crafted, attackers may be able to leverage the vulnerability to execute arbitrary code with the privileges of the X server process, which typically runs with elevated permissions. This could allow attackers to escalate their privileges and gain unauthorized access to system resources, making this vulnerability particularly attractive to malicious actors seeking to compromise Linux desktop environments.
The exploitation of this vulnerability aligns with several tactics described in the ATT&CK framework, particularly those related to privilege escalation and remote code execution through graphics subsystems. The vulnerability demonstrates characteristics consistent with CWE-121, which describes stack-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read vulnerabilities. These weaknesses in the driver's input validation create a pathway for attackers to manipulate memory structures and potentially execute malicious code. The affected platforms include various NVIDIA driver releases across multiple version lines, indicating a widespread exposure that affects numerous Linux distributions and embedded systems using NVIDIA graphics hardware.
Mitigation strategies for this vulnerability require immediate patching of affected driver versions with the appropriate updates from NVIDIA. System administrators should prioritize updating to driver versions that contain the necessary fixes for the GLX protocol handling, specifically targeting releases R304.125, R331.113, R340.65, R343.36, and R346.22 for standard Linux systems, along with the corresponding L4T and Chrome OS updates. Additionally, organizations should consider implementing network-level restrictions to limit access to graphics rendering services and monitor for unusual GLX protocol activity that might indicate exploitation attempts. The vulnerability highlights the importance of proper input validation in graphics drivers and demonstrates the critical need for robust memory safety mechanisms in system-level software components that handle untrusted data from network sources.