CVE-2023-30920 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-2023-30920 represents a critical permission bypass flaw within a messaging service component that fundamentally undermines the security model of the affected system. This issue stems from a missing permission check mechanism that allows unauthorized local access to sensitive information. The vulnerability exists at the service level where proper access controls should be enforced but are absent, creating a pathway for malicious actors to extract confidential data without requiring any additional privileges or execution rights beyond basic system access. Such a flaw directly violates fundamental security principles and represents a failure in the principle of least privilege enforcement.
The technical implementation of this vulnerability manifests as a failure in the messaging service's authorization framework where the system does not properly validate whether a requesting entity has appropriate permissions before granting access to message data or related metadata. This missing validation occurs at the service interface level where message retrieval operations are processed without adequate access control verification. The flaw can be exploited through local system access where an attacker with basic user privileges can leverage this vulnerability to obtain information that should be restricted to authorized users or processes. This represents a classic case of insufficient authorization checking that falls under the CWE-284 category of improper access control. The vulnerability is particularly concerning because it requires no additional execution privileges or elevated permissions to exploit, making it accessible to any local user who can interact with the messaging service.
The operational impact of CVE-2023-30920 extends beyond simple information disclosure, as the compromised messaging service may contain sensitive communication data, user credentials, system messages, or other confidential information that could be leveraged for further attacks. This local information disclosure vulnerability could enable attackers to gather intelligence about system operations, user activities, or internal communication patterns that might be used to plan more sophisticated attacks. The vulnerability aligns with ATT&CK technique T1005 which focuses on data from local system, and could potentially support techniques such as T1552 for credential access or T1083 for discovery of system information. Organizations may face compliance violations and regulatory penalties if sensitive data is disclosed through this vulnerability, particularly in environments governed by standards such as pci dss or hipaa where access control mechanisms are mandatory.
Mitigation strategies for CVE-2023-30920 must focus on implementing proper access control mechanisms within the messaging service framework. The primary remediation involves adding comprehensive permission checks at all service endpoints that handle message data, ensuring that each access request is validated against appropriate user roles and permissions before any information is returned. This requires implementing robust authorization logic that aligns with established security frameworks and follows the principle of least privilege. Organizations should also consider implementing additional monitoring and logging capabilities to detect unauthorized access attempts to the messaging service. The fix should be implemented as a service-level patch that enforces mandatory permission validation for all message operations, including read, write, and administrative functions. Regular security assessments and code reviews should be conducted to prevent similar permission bypass vulnerabilities from being introduced in future development cycles, with particular attention to the CWE-284 category of improper access control issues.