CVE-2023-20739 in MT6768
Summary
by MITRE • 06/06/2023
In vcu, there is a possible memory corruption due to a logic error. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07559819; Issue ID: ALPS07559819.
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Analysis
by VulDB Data Team • 01/08/2025
The vulnerability identified as CVE-2023-20739 resides within the vcu component where a logic error manifests as a potential memory corruption flaw. This memory corruption vulnerability represents a critical security concern as it can be exploited to achieve local privilege escalation, allowing an attacker with system execution privileges to elevate their access level. The flaw does not require user interaction for exploitation, making it particularly dangerous as it can be triggered automatically without any human intervention. The vulnerability affects systems where the vcu component is implemented, potentially compromising the integrity and confidentiality of the affected environment.
The technical root cause of this vulnerability stems from a logic error within the vcu implementation that leads to improper memory handling during processing operations. When the system processes certain inputs or executes specific functions, the flawed logic causes memory corruption that can be leveraged to manipulate system behavior. This type of vulnerability falls under the CWE-121 category of Stack-based Buffer Overflow, where improper memory management allows for unauthorized memory access and modification. The vulnerability's classification as a local privilege escalation issue indicates that while an attacker must already possess system execution privileges to begin exploitation, the flaw enables them to gain higher-level system access.
From an operational impact perspective, this vulnerability creates significant risks for organizations relying on systems containing the affected vcu component. The local privilege escalation capability means that an attacker who has already gained system execution privileges could use this flaw to obtain administrative or root-level access, thereby compromising the entire system. The lack of user interaction requirements makes this vulnerability particularly dangerous in environments where automated processes or services might be running with elevated privileges. Attackers could exploit this flaw to establish persistent access, escalate privileges beyond normal system limits, or potentially access sensitive data and system resources that should be protected from unauthorized access.
The patch identified as ALPS07559819 specifically addresses this memory corruption logic error within the vcu component. Organizations should prioritize applying this patch to mitigate the risk of local privilege escalation attacks. The patch likely involves correcting the memory handling logic and implementing proper bounds checking to prevent the memory corruption from occurring during normal system operations. Security teams should also consider implementing monitoring solutions to detect potential exploitation attempts, as the vulnerability may leave traces in system logs or memory dumps that could aid in forensic analysis. Additionally, system administrators should review access controls and privilege assignments to minimize the potential impact if the vulnerability is successfully exploited, aligning with the principle of least privilege as recommended by cybersecurity frameworks.