CVE-2022-47465 in SC9863A
Summary
by MITRE • 04/11/2023
In vdsp service, there is a missing permission check. This could lead to local denial of service in vdsp service.
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Analysis
by VulDB Data Team • 04/28/2023
The vulnerability identified as CVE-2022-47465 resides within the vdsp service, a component that typically handles video data processing and streaming operations in embedded systems and network devices. This service operates with elevated privileges and manages critical video processing functions that are essential for maintaining system functionality. The missing permission check represents a fundamental flaw in the service's access control mechanisms, where the system fails to verify whether incoming requests originate from authorized processes or users with appropriate privileges. This oversight creates a scenario where unauthorized local entities can interact with the vdsp service without proper authentication or authorization validation, fundamentally undermining the security model of the affected system.
The technical implementation of this vulnerability stems from the absence of proper access control validation within the vdsp service's request handling code. When the service receives requests, it should perform mandatory permission checks to ensure that only legitimate processes with appropriate privileges can execute specific operations. However, in this case, the service processes all incoming requests regardless of their source or authorization status, creating an exploitable condition where local attackers can manipulate the service behavior. The flaw likely manifests in the service's API handling code where authentication and authorization routines are either missing, improperly implemented, or bypassed entirely, allowing any local process to invoke functions that should be restricted to privileged operations.
The operational impact of this vulnerability extends beyond simple denial of service conditions, though that represents the primary concern. Local adversaries can exploit this weakness to disrupt video processing operations, potentially causing system instability or complete service failure. The denial of service can be achieved through various means such as sending malformed requests, triggering resource exhaustion conditions, or manipulating service parameters to cause operational failures. Given that the vdsp service typically handles real-time video data streams, such disruptions can have cascading effects on connected systems and may impact critical operations in surveillance, industrial control, or multimedia applications. The vulnerability essentially allows any local user or process to compromise the service's integrity and availability, making it particularly dangerous in environments where system stability and continuous operation are paramount.
Mitigation strategies for CVE-2022-47465 should focus on implementing proper access control mechanisms within the vdsp service. The most effective approach involves adding comprehensive permission checks at all entry points where the service processes external requests, ensuring that only authorized processes can invoke privileged operations. This remediation aligns with the principle of least privilege and follows security best practices outlined in the CWE-284 access control weakness category. Organizations should also implement proper input validation and sanitization routines to prevent exploitation through malformed requests. Additionally, system administrators should consider implementing process monitoring and logging to detect unauthorized access attempts to the vdsp service, which can help identify potential exploitation attempts. The fix should be implemented in accordance with the ATT&CK framework's privilege escalation techniques, ensuring that any unauthorized access attempts are properly detected and prevented, thereby reducing the attack surface and strengthening overall system security posture.
This vulnerability demonstrates the critical importance of access control validation in system services, particularly those handling sensitive data processing functions. The missing permission check represents a fundamental security flaw that can be exploited to disrupt system operations and compromise service availability. Proper implementation of access controls and authorization checks is essential for maintaining system integrity and preventing unauthorized manipulation of critical services. Organizations should conduct regular security assessments to identify similar access control weaknesses in their systems and ensure that all services implement proper authorization mechanisms to prevent exploitation of such vulnerabilities.