CVE-2022-48249 in SC9863A
Summary
by MITRE • 05/09/2023
In audio service, there is a possible missing permission check. This could lead to local escalation of privilege with no additional execution privileges.
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Analysis
by VulDB Data Team • 01/28/2025
The vulnerability identified as CVE-2022-48249 resides within the audio service component of a mobile operating system, specifically representing a critical permission check failure that enables local privilege escalation. This flaw exists in the system's audio subsystem where proper access controls have been omitted or incorrectly implemented, allowing malicious local processes to bypass security boundaries that should normally restrict their capabilities. The vulnerability falls under the category of insufficient privilege checks as defined by CWE-284, which directly relates to improper access control mechanisms within the system architecture. The audio service component typically operates with elevated privileges to manage system audio resources, but the missing permission verification creates an exploitable gap in the security model.
The technical implementation of this vulnerability stems from inadequate validation of caller permissions when processing audio-related requests or operations. Attackers can exploit this weakness by crafting malicious audio service requests that would normally be restricted to system-level processes or specific privileged applications. The flaw essentially allows any local user or application to perform operations that should be restricted to processes with higher privilege levels, creating a direct path for privilege escalation. This represents a classic case of privilege escalation vulnerability where the attacker does not require additional execution privileges beyond what is already available to a local user. The underlying mechanism likely involves improper validation of the calling process identity or insufficient checks on the request parameters that would normally trigger privilege verification.
The operational impact of CVE-2022-48249 extends beyond simple local privilege escalation, as it can potentially enable attackers to gain unauthorized access to system resources, modify audio configurations, or even access sensitive data through the elevated privileges. This vulnerability aligns with ATT&CK technique T1068 which describes the use of local privilege escalation to gain elevated system access. Once successfully exploited, the attacker could potentially access other system components, modify audio settings, or even establish persistence mechanisms within the audio service framework. The vulnerability affects the overall security posture of the device by undermining the principle of least privilege, where applications should only have the minimum permissions necessary to perform their functions. This flaw could be particularly dangerous in environments where multiple users share a device or where the audio service handles sensitive communications.
Mitigation strategies for CVE-2022-48249 should focus on implementing proper permission verification mechanisms within the audio service component. System administrators and developers should ensure that all audio service requests undergo thorough authentication and authorization checks before executing privileged operations. This includes implementing robust caller identity verification, validating request parameters against expected privilege levels, and enforcing proper access control lists. The fix should involve adding comprehensive permission checks that validate whether the requesting process has appropriate privileges to perform the requested audio operation. Additionally, regular security audits should be conducted to identify similar permission gaps in other system services, as this type of vulnerability often indicates broader architectural issues. Organizations should also implement monitoring solutions to detect anomalous audio service access patterns that could indicate exploitation attempts. The vulnerability demonstrates the importance of maintaining strict access control boundaries even within system services that appear to be non-critical, as these components often provide pathways for more sophisticated attacks.