CVE-2023-30921 in SC9863A
Summary
by MITRE • 07/12/2023
In messaging service, there is a missing permission check. This could lead to local information disclosure with no additional execution privileges needed.
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Analysis
by VulDB Data Team • 07/30/2023
The vulnerability identified as CVE-2023-30921 represents a critical permission bypass flaw within a messaging service component that exposes sensitive information through improper access control mechanisms. This issue stems from a fundamental failure in the service's authorization framework where mandatory permission checks are either absent or incorrectly implemented, allowing unauthorized local entities to access confidential data without requiring elevated privileges or additional malicious actions. The vulnerability specifically targets the messaging service's internal data structures and communication channels, creating a pathway for information disclosure that could compromise the integrity of the system's data protection mechanisms.
From a technical perspective, this missing permission check creates a direct attack vector that operates at the application layer where the messaging service fails to validate whether requesting entities possess the appropriate authorization levels to access specific message queues, user communications, or system metadata. The flaw likely manifests in code segments responsible for message routing, user session management, or data retrieval functions where proper authentication and authorization routines are either omitted or bypassed through logical errors in conditional statements. This type of vulnerability aligns with CWE-284 which specifically addresses improper access control issues, and represents a classic example of insufficient authorization checks that enable unauthorized data access.
The operational impact of this vulnerability extends beyond simple information disclosure, as local attackers can potentially extract sensitive communication data, user credentials, or system configuration details that may facilitate further exploitation. Attackers leveraging this vulnerability can access message content, user identifiers, communication patterns, and potentially system logs or metadata without requiring additional privileges such as administrative access or code execution capabilities. This makes the vulnerability particularly dangerous in environments where the messaging service handles confidential communications, personal data, or system-critical information. The lack of additional execution privileges needed for exploitation means that even low-privileged local users or processes can potentially access sensitive data, creating a significant risk for organizations that rely on proper access controls for data protection.
Security professionals should consider this vulnerability in the context of the attack chain framework where it may serve as an initial access point for more sophisticated attacks. The vulnerability's classification aligns with attack techniques described in the MITRE ATT&CK framework under initial access and credential access categories, particularly where adversaries seek to obtain information through legitimate system access rather than through more direct exploitation methods. Organizations should implement immediate mitigations including comprehensive code reviews to identify all permission-checking mechanisms, deployment of access control patches, and monitoring for unauthorized access attempts to messaging service components. The remediation approach should focus on implementing proper authorization checks across all messaging service interfaces and ensuring that all data access points enforce appropriate permission validation before allowing information retrieval. Additionally, system administrators should conduct thorough audits of messaging service configurations and implement network segmentation to limit local access to critical messaging components, thereby reducing the attack surface and potential impact of such permission bypass vulnerabilities.