CVE-2024-20109 in MT6765
Summary
by MITRE • 11/04/2024
In ccu, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09065928; Issue ID: MSV-1763.
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Analysis
by VulDB Data Team • 11/04/2024
The vulnerability identified as CVE-2024-20109 resides within the ccu component, representing a critical out-of-bounds write flaw that fundamentally compromises system integrity. This issue stems from the absence of proper bounds checking mechanisms within the codebase, creating a scenario where memory operations can exceed allocated boundaries. The vulnerability manifests in a manner that allows for local privilege escalation, requiring only system execution privileges for exploitation, which significantly reduces the attack surface complexity. Unlike many vulnerabilities that necessitate user interaction or specific environmental conditions, this flaw can be exploited autonomously, making it particularly dangerous in environments where system-level access might be compromised.
The technical nature of this vulnerability aligns with CWE-787, which specifically addresses out-of-bounds write conditions in software systems. This classification indicates that the flaw occurs when a program writes data past the end of a buffer or array, potentially corrupting adjacent memory regions and enabling arbitrary code execution. The ccu component's failure to implement adequate input validation and boundary verification creates a direct pathway for malicious actors to manipulate memory structures. The absence of bounds checking implies that the software assumes all inputs will conform to expected parameters without proper validation, a common security oversight that can have severe consequences in system-level components.
From an operational impact perspective, this vulnerability represents a significant threat to system security and integrity. The local privilege escalation capability means that an attacker with minimal privileges could potentially elevate their access level to system administrator status, gaining unrestricted control over the affected system. The requirement for only system execution privileges indicates that the vulnerability is accessible through legitimate system processes or services, making detection more challenging. This flaw could enable attackers to establish persistent access, modify critical system files, or exfiltrate sensitive data without raising obvious detection flags. The autonomous exploitation nature eliminates the need for social engineering or user interaction, allowing for automated attack scenarios that could compromise multiple systems simultaneously.
The mitigation strategy for CVE-2024-20109 should prioritize immediate patch application, with the referenced patch ID ALPS09065928 providing the necessary code modifications to address the bounds checking deficiency. System administrators should implement comprehensive monitoring to detect any anomalous behavior that might indicate exploitation attempts, particularly focusing on unusual memory access patterns or privilege escalation activities. Network segmentation and privilege separation measures should be reinforced to limit the potential impact of successful exploitation attempts. The vulnerability's classification under ATT&CK technique T1068, which covers local privilege escalation, suggests that defensive measures should include regular system audits, process monitoring, and implementation of least privilege principles. Additionally, organizations should conduct thorough vulnerability assessments to identify any similar bounds checking issues within their codebase, as this represents a pattern of security flaws that could affect other system components. The remediation process should include code review procedures specifically targeting memory management functions and input validation mechanisms to prevent similar vulnerabilities from emerging in future releases.