CVE-2022-20105 in MT9011
Summary
by MITRE • 05/04/2022
In MM service, there is a possible out of bounds write due to a stack-based buffer overflow. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: DTV03330460; Issue ID: DTV03330460.
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Analysis
by VulDB Data Team • 05/07/2022
The vulnerability identified as CVE-2022-20105 resides within the MM service component, representing a critical stack-based buffer overflow that manifests as an out-of-bounds write condition. This flaw exists in the memory management handling routines where insufficient bounds checking permits data to be written beyond the allocated stack buffer boundaries. The vulnerability is particularly concerning as it operates without requiring any user interaction for exploitation, making it an autonomous privilege escalation vector that can be leveraged by malicious actors. The affected system requires system execution privileges to exploit this vulnerability, indicating that it targets components with elevated access rights within the operating system architecture.
The technical implementation of this buffer overflow stems from improper input validation mechanisms within the MM service's memory allocation and data handling procedures. When processing specific input parameters or data streams, the service fails to properly verify buffer limits before performing memory operations, allowing attackers to overwrite adjacent stack memory locations. This condition creates opportunities for arbitrary code execution within the context of the privileged MM service process. The stack-based nature of the vulnerability means that the overflow can overwrite return addresses, function pointers, and other critical stack metadata that govern program execution flow.
The operational impact of this vulnerability extends significantly beyond simple memory corruption, as it enables local privilege escalation to system level privileges. An attacker who successfully exploits this vulnerability can gain complete control over the affected system's MM service components and potentially elevate their privileges to the highest system level. This represents a severe security compromise that could allow unauthorized access to sensitive system resources, data exfiltration, and further lateral movement within the network. The lack of user interaction requirements makes this vulnerability particularly dangerous as it can be exploited automatically without any human intervention.
Security mitigations for this vulnerability should prioritize immediate patch application, as indicated by the provided patch ID DTV03330460 which addresses the specific buffer overflow conditions within the MM service. Organizations should implement comprehensive monitoring for unusual system behavior that might indicate exploitation attempts, including anomalous memory access patterns and privilege escalation activities. The vulnerability aligns with CWE-121 Stack-based Buffer Overflow, which specifically addresses buffer overflows occurring in stack memory regions, and represents a clear threat vector for ATT&CK technique T1068, Privilege Escalation through exploitation of system vulnerabilities. Additional defensive measures should include system hardening practices, privilege separation, and regular security assessments to identify similar memory corruption vulnerabilities within the system's service architecture.