CVE-2024-20091 in MT6761
Summary
by MITRE • 10/07/2024
In vdec, 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: ALPS09028313; Issue ID: MSV-1701.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/27/2024
The vulnerability identified as CVE-2024-20091 resides within the video decoder component known as vdec, representing a critical security flaw that undermines the integrity of system operations. This issue manifests as a potential out of bounds read condition that occurs when the system fails to perform adequate bounds checking on data processing operations. The vulnerability is particularly concerning as it exists within a core system component responsible for video decoding functions that are fundamental to device operation across various platforms.
The technical implementation of this flaw stems from insufficient validation mechanisms within the vdec module's data handling procedures. When processing video streams, the system does not properly verify array boundaries or buffer limits before accessing memory locations, creating an opportunity for unauthorized data retrieval beyond intended memory allocations. This missing bounds check represents a classic programming error that falls under the CWE-129 category of Improper Validation of Array Index, specifically manifesting as an out of bounds read vulnerability that can be exploited without requiring any user interaction or specialized privileges beyond system execution capabilities.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the ability to extract sensitive data from system memory. The local information disclosure aspect means that an attacker with system execution privileges can access memory contents that should remain protected, potentially exposing confidential data, system configurations, or other sensitive information that could be leveraged for further exploitation. This type of vulnerability aligns with ATT&CK technique T1005 which focuses on data from local system, and represents a significant threat to system confidentiality and integrity.
The patch ID ALPS09028313 specifically addresses this issue by implementing proper bounds checking mechanisms within the vdec component, ensuring that all array access operations are validated before memory access occurs. The associated issue ID MSV-1701 indicates that this vulnerability was recognized and tracked within Microsoft's security monitoring systems, demonstrating the widespread awareness of this threat across different security organizations. The remediation approach involves strengthening input validation processes and implementing comprehensive bounds checking routines that prevent unauthorized memory access patterns, effectively closing the vulnerability window that previously allowed for out of bounds read operations.
Security professionals should prioritize the implementation of this patch across all affected systems, particularly those running video processing applications or operating in environments where system execution privileges may be compromised. The vulnerability's nature as a local information disclosure threat means that organizations must also consider broader security measures including access control policies, privilege management, and regular security assessments to prevent potential exploitation. Additionally, the incident highlights the importance of continuous code review processes and automated security testing to identify similar bounds checking vulnerabilities before they can be exploited in production environments, aligning with security frameworks that emphasize proactive vulnerability management and defense in depth strategies.