CVE-2023-43550 in Snapdragon
Summary
by MITRE • 03/04/2024
Memory corruption while processing a QMI request for allocating memory from a DHMS supported subsystem.
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Analysis
by VulDB Data Team • 01/10/2025
This vulnerability exists within the Qualcomm MSM (Mobile Services Module) subsystem where memory corruption occurs during the processing of QMI (Qualcomm MSM Interface) requests for memory allocation from DHMS (Data Handling and Management Subsystem) supported components. The flaw manifests when the system attempts to allocate memory resources through QMI protocol communications, creating a potential avenue for arbitrary code execution or system instability. The vulnerability specifically targets the memory management mechanisms within the Qualcomm proprietary software stack that handles mobile data processing operations. According to CWE-122, this represents a weakness in memory management where improper allocation or deallocation leads to memory corruption conditions that can be exploited by malicious actors. The issue is particularly concerning as it operates at a low-level system interface that handles critical mobile data operations, making it a prime target for attackers seeking to compromise mobile device security. The QMI protocol serves as a fundamental communication layer between different subsystems within Qualcomm chipsets, and any corruption in this pathway can lead to cascading failures throughout the device's operational capabilities.
The technical implementation of this vulnerability involves the improper handling of memory allocation requests within the DHMS subsystem when processing QMI messages. When a QMI request is received for memory allocation from DHMS components, the system fails to properly validate or sanitize the allocation parameters, leading to potential buffer overflows or memory corruption scenarios. This memory corruption can occur in both kernel-level and user-space components of the Qualcomm software stack, depending on the specific implementation details. The vulnerability's exploitation potential is significantly enhanced by the fact that QMI requests are commonly used for legitimate system operations, making it difficult to distinguish between normal traffic and malicious payloads. Attackers can craft specially crafted QMI requests that trigger the memory corruption condition, potentially leading to privilege escalation or complete system compromise. The ATT&CK framework categorizes this as a memory corruption vulnerability within the system's communication protocols, specifically targeting the privilege escalation and execution phases of an attack lifecycle. The flaw essentially allows an attacker to manipulate memory layout and potentially overwrite critical system structures through malformed QMI requests.
The operational impact of this vulnerability extends across multiple mobile device platforms that utilize Qualcomm chipsets, particularly affecting smartphones, tablets, and IoT devices running Android or other operating systems that rely on Qualcomm's MSM subsystems. Devices that frequently process network data, handle multimedia communications, or perform complex data operations are at higher risk due to increased QMI traffic. The memory corruption can manifest as system crashes, unexpected reboots, or more severe conditions where the attacker gains elevated privileges to execute arbitrary code within the device's memory space. This vulnerability is particularly dangerous in mobile environments where devices often operate with elevated privileges and have access to sensitive user data, network communications, and hardware components. The potential for remote exploitation exists if the QMI interface is accessible over network connections or through device-to-device communications, making it a critical concern for mobile security. Organizations using Qualcomm-based devices for enterprise operations or those handling sensitive data must consider the risk of data breaches, system compromise, and potential denial-of-service conditions. The vulnerability affects not only consumer devices but also industrial and automotive systems that rely on Qualcomm chipsets for connectivity and data processing functions.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and memory management practices within the QMI processing components. System administrators and device manufacturers should prioritize applying security patches provided by Qualcomm and ensure all firmware updates are deployed promptly. The implementation of memory protection mechanisms such as stack canaries, address space layout randomization, and heap metadata validation can significantly reduce exploitation success rates. Network segmentation and access controls should be implemented to limit exposure of QMI interfaces to trusted networks only. Organizations should also consider monitoring QMI traffic patterns for anomalous requests that could indicate exploitation attempts. Device manufacturers should incorporate automated vulnerability scanning during the development lifecycle and implement comprehensive testing procedures for memory management functions. The security community recommends maintaining updated threat intelligence on QMI-based attacks and establishing incident response procedures specifically for memory corruption vulnerabilities in mobile platforms. Regular security assessments of Qualcomm-based systems should include detailed analysis of memory allocation patterns and QMI interface handling to identify potential variations of this vulnerability. Additionally, implementing behavioral monitoring solutions that detect unusual memory allocation patterns or system stability issues can provide early warning capabilities for exploitation attempts.