CVE-2020-3671 in Snapdragon Compute
Summary
by MITRE
Use-after-free issue could occur due to dangling pointer when generating a frame buffer in OpenGL ES in Snapdragon Compute, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music in APQ8009, Nicobar, QCM2150, QCS405, Saipan, SDM845, SM8150, SM8250, SXR2130
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Analysis
by VulDB Data Team • 11/06/2020
The vulnerability identified as CVE-2020-3671 represents a critical use-after-free condition that manifests within the OpenGL ES implementation of Qualcomm Snapdragon chipsets. This flaw exists in multiple hardware platforms including the APQ8009, Nicobar, QCM2150, QCS405, Saipan, SDM845, SM8150, SM8250, and SXR2130 processors. The issue arises during the frame buffer generation process in the OpenGL ES graphics subsystem, creating a scenario where memory that has been freed becomes accessible through a dangling pointer reference. This fundamental memory management error creates a potential exploitation vector for malicious actors seeking to compromise device security and stability.
The technical implementation of this vulnerability stems from improper memory handling within the graphics processing pipeline of Qualcomm's Snapdragon SoCs. When the system attempts to generate frame buffers for OpenGL ES operations, a race condition or memory management flaw allows a pointer to reference freed memory locations. This dangling pointer can then be accessed by subsequent operations, leading to unpredictable behavior that may include arbitrary code execution, system crashes, or privilege escalation. The vulnerability specifically impacts the graphics rendering subsystem, making it particularly dangerous in environments where graphics-intensive applications are prevalent, such as mobile devices, IoT systems, and automotive infotainment platforms. The flaw demonstrates characteristics consistent with CWE-416, which describes use-after-free vulnerabilities, and aligns with ATT&CK technique T1059.007 for process injection and T1068 for local privilege escalation.
The operational impact of CVE-2020-3671 extends across multiple device categories and deployment scenarios, affecting everything from smartphones and tablets to industrial IoT devices and automotive systems. Mobile devices running on affected Snapdragon processors could experience application crashes, system instability, or complete device compromise when graphics-intensive applications are executed. In automotive environments, this vulnerability could potentially impact infotainment systems, instrument clusters, or advanced driver assistance systems that rely on OpenGL ES for graphical rendering. The vulnerability's presence in Snapdragon Compute and Snapdragon Consumer IOT platforms suggests risks to enterprise devices, smart home systems, and embedded computing solutions. The widespread adoption of these chipsets across numerous device types increases the attack surface significantly. The vulnerability's exploitation could lead to persistent backdoors, data exfiltration, or complete system takeover, particularly in environments where users may not regularly update firmware or operating system components.
Mitigation strategies for CVE-2020-3671 should prioritize immediate firmware and software updates from device manufacturers, as Qualcomm has released patches addressing this specific memory management flaw. Organizations should implement comprehensive device inventory management to identify all affected hardware platforms and establish mandatory update schedules. Network segmentation and monitoring systems should be deployed to detect anomalous graphics processing behavior that might indicate exploitation attempts. Security teams should conduct regular vulnerability assessments focusing on graphics rendering components and memory management functions. Additionally, implementing runtime protections such as address space layout randomization and stack canaries can provide additional defense-in-depth measures. Device manufacturers should consider implementing secure boot processes and integrity checking mechanisms to prevent exploitation of this vulnerability. The remediation process must include thorough testing of updated firmware to ensure that the patch does not introduce regressions in graphics performance or application compatibility, particularly in enterprise environments where legacy applications may be affected by changes to the graphics subsystem.