CVE-2023-33029 in AR8035
Summary
by MITRE • 10/25/2023
Memory corruption in DSP Service during a remote call from HLOS to DSP.
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Analysis
by VulDB Data Team • 08/07/2025
The vulnerability identified as CVE-2023-33029 represents a critical memory corruption flaw within the Digital Signal Processor service of Qualcomm devices, specifically occurring during remote procedure calls from the Host Linux Operating System (HLOS) to the DSP. This issue stems from inadequate input validation and memory management within the inter-process communication mechanisms that facilitate data exchange between the application processor and the dedicated DSP. The vulnerability manifests when HLOS initiates remote calls to DSP services, creating opportunities for malicious actors to exploit memory handling inconsistencies that could lead to arbitrary code execution or system instability. Such memory corruption vulnerabilities are particularly concerning in automotive and mobile platforms where DSP services handle critical real-time processing tasks including audio processing, signal filtering, and sensor data interpretation.
The technical exploitation of this vulnerability involves leveraging improper bounds checking during remote procedure call processing, where malicious inputs can cause buffer overflows or use-after-free conditions within DSP service memory allocations. The flaw occurs in the communication layer that bridges HLOS and DSP environments, specifically affecting the memory management routines that handle data serialization and deserialization during inter-processor communication. According to CWE classification, this vulnerability maps to CWE-121, which describes stack-based buffer overflow conditions, and CWE-787, which addresses out-of-bounds write operations. The attack surface is particularly significant given that DSP services often operate with elevated privileges and handle sensitive real-time data streams that are critical for device functionality and security.
The operational impact of CVE-2023-33029 extends beyond simple system crashes or hangs, as it can enable attackers to execute arbitrary code within the DSP context, potentially compromising the integrity of real-time processing pipelines. This vulnerability could allow adversaries to manipulate audio processing, sensor data interpretation, or communication protocols that rely on DSP services, creating opportunities for surveillance, data exfiltration, or system control. The exploitation of this flaw could lead to persistent backdoors within automotive systems, mobile devices, or IoT platforms where DSP services are integral to core functionalities. From an ATT&CK framework perspective, this vulnerability aligns with techniques such as T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation, as attackers could leverage the compromised DSP service to gain deeper system access.
Mitigation strategies for this vulnerability require immediate firmware updates from device manufacturers, as Qualcomm has released patches addressing the memory corruption issues within DSP service implementations. System administrators should prioritize deployment of these patches across affected platforms, particularly in automotive environments where DSP services control critical vehicle functions. Additional protective measures include implementing memory protection mechanisms such as stack canaries, address space layout randomization, and input validation controls within the DSP communication interfaces. Network segmentation and monitoring of inter-processor communication patterns can help detect anomalous behavior that might indicate exploitation attempts. Organizations should also consider implementing runtime application self-protection mechanisms and regular security assessments of DSP service configurations to prevent unauthorized access to these critical system components.