CVE-2023-30923 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-2023-30923 represents a critical authorization flaw within a messaging service component that fails to properly validate user permissions before exposing sensitive information. This missing permission check creates a pathway for unauthorized access to local data that would typically be restricted to privileged users or specific application components. The flaw exists at the authorization layer where the system assumes that legitimate users have appropriate access rights without performing necessary validation checks. According to CWE-284, this vulnerability maps directly to inadequate access control mechanisms that allow actors to bypass intended security restrictions. The messaging service in question likely handles sensitive communications, user data, or system information that should remain protected from unauthorized disclosure.
The technical implementation of this vulnerability stems from the absence of proper access control validation within the messaging service's codebase. When the service processes requests for information or data retrieval, it fails to verify whether the requesting entity possesses the required permissions to access the requested resources. This flaw allows any local process or user to potentially access information that should be restricted. The vulnerability does not require additional execution privileges or code injection capabilities, making it particularly dangerous as it can be exploited by any local entity with basic system access. The lack of privilege verification creates a direct information disclosure channel that bypasses normal security boundaries. From an ATT&CK perspective, this maps to technique T1005 - Data from Local System, where adversaries can leverage missing permission checks to obtain sensitive information.
The operational impact of CVE-2023-30923 extends beyond simple information disclosure as it can enable further exploitation attempts and lateral movement within affected systems. Local information disclosure can provide attackers with sensitive data such as user credentials, session tokens, system configurations, or communication metadata that could be leveraged for more sophisticated attacks. The vulnerability's accessibility means that even unprivileged local users or processes could exploit it, potentially leading to privilege escalation or additional system compromise. The lack of execution privileges requirement significantly increases the attack surface as the vulnerability can be exploited by any local entity without requiring elevated permissions. This makes the vulnerability particularly concerning in environments where multiple users or processes share the same system resources. The impact is amplified when considering that messaging services often handle sensitive communications and may contain information that could be used for social engineering, credential theft, or system compromise.
Mitigation strategies for CVE-2023-30923 should focus on implementing proper access control validation within the messaging service component. The primary remediation involves adding comprehensive permission checks before any information is returned or accessed through the messaging service interface. Security controls should enforce principle of least privilege where access to sensitive information is strictly limited to authorized users or processes. System administrators should implement proper logging and monitoring to detect unauthorized access attempts to the messaging service. The fix should include validating user identities, roles, and permissions against established access control policies before allowing information disclosure. Additionally, regular security audits should be conducted to identify similar permission check gaps in other system components. Organizations should also consider implementing network segmentation and application-level firewalls to limit access to messaging services. The remediation process should follow security best practices outlined in NIST SP 800-53 and ISO 27001 standards for access control and information security management. Regular vulnerability assessments and penetration testing should be performed to ensure that similar authorization flaws are not present in other system components.