CVE-2025-20643 in MT6739
Summary
by MITRE • 02/03/2025
In DA, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure, if an attacker has physical access to the device, if a malicious actor has already obtained the System privilege. User interaction is needed for exploitation. Patch ID: ALPS09291146; Issue ID: MSV-2056.
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Analysis
by VulDB Data Team • 02/03/2025
The vulnerability identified as CVE-2025-20643 represents a critical out-of-bounds read condition within the DA component of a system architecture that fundamentally compromises memory safety mechanisms. This flaw arises from the absence of proper bounds checking during memory access operations, creating an exploitable path where unauthorized data retrieval becomes possible. The vulnerability specifically affects systems where DA serves as a core component in device management or security operations, making it particularly concerning for embedded systems and IoT devices where physical access controls may be limited.
The technical implementation of this vulnerability stems from inadequate input validation and memory management practices within the DA subsystem. When processing specific input sequences or data structures, the system fails to verify that memory access operations remain within allocated boundaries. This missing bounds check creates a scenario where subsequent memory reads may traverse into adjacent memory regions, potentially exposing sensitive data that should remain protected. The flaw manifests as a direct consequence of insufficient defensive programming practices that are standard in secure coding methodologies.
Operational exploitation of this vulnerability requires an attacker to possess either physical access to the target device or already have system-level privileges, which significantly reduces the attack surface but does not eliminate the risk entirely. The requirement for user interaction indicates that the vulnerability likely resides in a component that processes user-provided data or triggers specific system behaviors that must be initiated by an authenticated user. This dependency on user interaction suggests that the attack vector may involve social engineering or targeted phishing campaigns that could lead to privilege escalation. The information disclosure impact could potentially expose system configuration data, user credentials, or other sensitive operational details that would otherwise remain protected.
The patch addressing this vulnerability, identified as ALPS09291146, specifically targets the missing bounds check within the DA component and implements proper memory validation mechanisms. This fix aligns with established security practices for preventing out-of-bounds memory access issues and represents a standard remediation approach for such vulnerabilities. The issue ID MSV-2056 indicates that this vulnerability was tracked through a formal vulnerability management process, suggesting that appropriate risk assessment and prioritization occurred during its identification and resolution phases. Organizations should prioritize deployment of this patch as part of their vulnerability management protocols, particularly in environments where physical security controls may be insufficient to prevent unauthorized access.
This vulnerability type maps directly to CWE-129, which specifically addresses insufficient bounds checking, and represents a classic example of memory safety issues that fall under the broader category of buffer overflows and related memory corruption vulnerabilities. The attack surface for this vulnerability aligns with ATT&CK technique T1068, which involves exploiting legitimate credentials or privileges to gain unauthorized access to system resources. The information disclosure aspect also relates to ATT&CK technique T1005, which focuses on data from local system storage. Organizations should consider implementing additional security controls beyond patch deployment, including network segmentation, access control reviews, and physical security measures to address the underlying risk factors that enable exploitation of this vulnerability.