CVE-2023-33069 in 7c+ Gen 3 Compute
Summary
by MITRE • 02/06/2024
Memory corruption in Audio while processing the calibration data returned from ACDB loader.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 08/07/2025
This vulnerability resides in the audio subsystem of Android devices, specifically within the Audio Calibration Database (ACDB) loader component that handles calibration data for audio hardware. The memory corruption occurs during the processing of calibration data returned from the ACDB loader, creating a critical security flaw that could allow attackers to execute arbitrary code or cause system instability. The issue stems from inadequate input validation and memory management when handling calibration parameters that are typically used to configure audio hardware components such as microphones, speakers, and audio codecs. This vulnerability represents a classic buffer overflow scenario where untrusted calibration data is processed without proper bounds checking, potentially allowing attackers to overwrite adjacent memory locations. The flaw is particularly concerning because audio subsystems often run with elevated privileges and have direct hardware access, making this a high-value target for attackers seeking to escalate privileges or gain persistent access to devices.
The technical implementation of this vulnerability involves the ACDB loader component receiving calibration data from audio hardware drivers or firmware updates, which is then processed by the audio framework. When the system attempts to parse or validate this calibration data, insufficient boundary checks allow for memory corruption to occur. This type of flaw maps directly to CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow conditions. The vulnerability can be exploited through malicious calibration data that is either injected during device provisioning, delivered through compromised firmware updates, or introduced via compromised audio hardware components. Attackers may leverage this weakness to execute code in the context of the audio subsystem, potentially gaining access to sensitive audio processing capabilities and hardware interfaces. The memory corruption can manifest as arbitrary code execution, system crashes, or denial of service conditions that disrupt audio functionality.
The operational impact of CVE-2023-33069 extends beyond simple audio functionality disruption, as it represents a potential gateway for broader system compromise. Mobile devices running affected Android versions could be vulnerable to attacks that target the audio subsystem, particularly in scenarios where audio hardware is frequently updated or reconfigured. The attack surface is significant given that audio calibration data is routinely processed during device boot, hardware configuration changes, or firmware updates, providing multiple potential exploitation vectors. This vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as attackers may attempt to execute malicious code through audio processing channels, and T1068 for exploit for privilege escalation, since audio subsystems often operate with elevated privileges. The flaw affects devices that utilize Qualcomm Snapdragon processors or similar audio hardware platforms that rely on ACDB for calibration management, making it particularly relevant to smartphones, tablets, and other mobile devices that depend on hardware-specific audio tuning.
Mitigation strategies for this vulnerability require immediate patching of affected Android versions and firmware components. Device manufacturers should implement strict input validation for all calibration data received from ACDB loaders, ensuring that buffer sizes are properly checked before memory allocation. Security measures should include runtime protection mechanisms such as stack canaries, address space layout randomization, and code integrity checks to prevent exploitation attempts. System administrators should monitor for unauthorized audio hardware modifications or firmware updates that could introduce malicious calibration data. The implementation of secure coding practices for audio subsystem components should follow established guidelines from the CWE database and security frameworks such as the OWASP Secure Coding Practices. Additionally, network-based monitoring should be deployed to detect unusual audio processing patterns that could indicate exploitation attempts, while regular security assessments should verify that calibration data processing components are properly hardened against buffer overflow attacks. Organizations should also consider implementing device integrity checks that validate the authenticity of calibration data before processing, ensuring that only trusted calibration parameters are accepted by the audio subsystem.