CVE-2023-20665 in MT6739
Summary
by MITRE • 04/06/2023
In ril, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07628604; Issue ID: ALPS07628604.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 08/29/2025
The vulnerability identified as CVE-2023-20665 resides within the ril component of a mobile operating system, specifically affecting Android-based devices. This issue represents a classic out-of-bounds read condition that occurs when the system fails to properly validate array indices before accessing memory locations. The flaw manifests in the Radio Interface Layer which handles communication between the device's baseband processor and the application layer, making it a critical component for device functionality and security.
The technical implementation of this vulnerability stems from a missing bounds check within the ril processing logic, which allows an attacker to manipulate input data in such a way that memory access occurs beyond the allocated buffer boundaries. This particular flaw is categorized under CWE-129 as an Improper Validation of Array Index, which directly relates to the absence of proper input validation mechanisms. The vulnerability requires system execution privileges for exploitation, indicating that it operates at a privileged level within the device's operating system architecture, typically involving kernel or system-level components.
The operational impact of this vulnerability extends beyond simple information disclosure, as it could potentially enable attackers to extract sensitive data from memory locations that should remain protected. The local nature of exploitation means that an attacker would need physical access to the device or must already have compromised system-level privileges. However, the absence of user interaction requirements makes this particularly concerning as it allows for automated exploitation without requiring user deception or social engineering tactics. This characteristic aligns with ATT&CK technique T1059.001 for Command and Scripting Interpreter, where an attacker could leverage this vulnerability to execute malicious code with elevated privileges.
The patch addressing this vulnerability, identified as ALPS07628604, specifically targets the bounds checking mechanism within the ril component to ensure proper validation of input parameters before memory access operations occur. This remediation follows standard security practices for preventing buffer overflow conditions and demonstrates the importance of input validation in secure coding practices. The vulnerability's classification as a local information disclosure issue indicates that while it may not allow for remote code execution, it does provide attackers with access to sensitive information that could be used for further exploitation or reconnaissance activities. Organizations should prioritize applying this patch to maintain device security and prevent potential escalation of privileges through this memory access flaw.