CVE-2023-32832 Overview
CVE-2023-32832 is a race condition vulnerability in the MediaTek video driver component affecting Google Android devices running on various MediaTek chipsets. The vulnerability exists in the video processing subsystem where improper synchronization of concurrent operations can lead to memory corruption. This flaw enables local privilege escalation without requiring any user interaction, making it a significant threat to affected devices.
Critical Impact
Local attackers can exploit this race condition to escalate privileges on vulnerable Android devices with MediaTek chipsets, potentially gaining elevated system access without user interaction.
Affected Products
- Google Android 12.0
- Google Android 13.0
- MediaTek MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT6985, MT8797, MT8798 chipsets
Discovery Timeline
- November 6, 2023 - CVE CVE-2023-32832 published to NVD
- April 25, 2025 - Last updated in NVD database
Technical Details for CVE-2023-32832
Vulnerability Analysis
This vulnerability is classified as CWE-787 (Out-of-bounds Write) and manifests as a race condition in the MediaTek video driver component. The flaw occurs during concurrent video processing operations where improper synchronization allows multiple threads to access shared memory regions simultaneously. When the race condition is triggered, it can result in memory corruption as one thread may modify memory while another thread is still operating on the same data.
The attack requires local access to the device but does not require elevated privileges to initiate. No user interaction is necessary for exploitation, which increases the practical exploitability of this vulnerability. A successful exploit could allow an attacker to escalate from a low-privileged application context to gain higher system privileges.
Root Cause
The root cause of CVE-2023-32832 lies in inadequate synchronization mechanisms within the MediaTek video driver's memory management routines. When multiple threads or processes access video processing resources concurrently, the lack of proper locking or atomic operations creates a Time-of-Check Time-of-Use (TOCTOU) window. During this window, memory state can change between validation and use, leading to out-of-bounds write conditions that corrupt adjacent memory regions.
Attack Vector
The attack vector is local, requiring an attacker to have code execution capability on the target device. The attacker can exploit this vulnerability by crafting a malicious application or process that deliberately triggers concurrent video operations to induce the race condition. The exploitation mechanism involves:
- Initiating multiple simultaneous video processing requests
- Timing the requests to create a race window in the driver's memory handling
- Exploiting the resulting memory corruption to overwrite critical data structures
- Leveraging the corrupted state to escalate privileges
Technical details and exploitation methodology are documented in the Packet Storm Exploit Report.
Detection Methods for CVE-2023-32832
Indicators of Compromise
- Unusual video driver activity or repeated video processing failures
- Unexpected privilege elevation events from low-privileged applications
- Kernel log entries indicating memory corruption in MediaTek video components
- Anomalous process behavior following video-related system calls
Detection Strategies
- Monitor for applications attempting rapid, concurrent video processing operations
- Implement kernel-level auditing for MediaTek video driver interactions
- Deploy endpoint detection solutions that can identify privilege escalation attempts
- Analyze system logs for mtk_jpeg driver-related errors or crashes
Monitoring Recommendations
- Enable verbose logging for video driver components on affected devices
- Monitor for processes spawning with unexpected elevated privileges
- Track memory access patterns in kernel space associated with video operations
- Implement behavioral analysis to detect exploitation attempts
How to Mitigate CVE-2023-32832
Immediate Actions Required
- Apply the security patch identified as ALPS08235273 from MediaTek
- Update affected Android devices to the latest available security patch level
- Restrict installation of applications from untrusted sources
- Review installed applications for potentially malicious behavior
Patch Information
MediaTek has released a security patch addressing this vulnerability. The patch is tracked as ALPS08235273 and is included in the MediaTek Security Bulletin November 2023. Device manufacturers should integrate this patch into their firmware updates, and end users should apply the latest security updates provided by their device vendors.
Workarounds
- Limit installation of applications to trusted sources only (Google Play Store)
- Disable or restrict video processing features if not required
- Consider using mobile device management (MDM) solutions to enforce security policies
- Monitor device behavior for signs of exploitation until patches can be applied
# Verify Android security patch level
adb shell getprop ro.build.version.security_patch
# Expected output should be November 2023 or later for patched devices
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
