CVE-2023-40650 in SC7731E
Summary
by MITRE • 10/25/2023
In Telecom service, there is a possible 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 • 10/27/2023
The vulnerability identified as CVE-2023-40650 represents a critical permission enforcement flaw within telecom service implementations that could enable unauthorized information disclosure. This issue manifests as a missing permission check that allows local attackers to access sensitive data without requiring elevated privileges or additional execution capabilities. The vulnerability resides in the core permission management mechanisms of telecom service applications, where proper access controls have been omitted or incorrectly implemented, creating a pathway for unauthorized data exposure.
This technical flaw directly maps to CWE-284 which describes improper access control vulnerabilities, specifically those where insufficient checks are performed to verify that an actor has appropriate permissions before accessing resources. The vulnerability operates at the application level where telecom service components fail to validate user credentials or authorization tokens before granting access to sensitive information. The missing permission check creates a privilege escalation vector that can be exploited by any local user who can interact with the affected service, making the attack surface particularly broad and accessible.
The operational impact of CVE-2023-40650 extends beyond simple information disclosure to potentially compromise the integrity of telecom service operations. Local information disclosure can expose sensitive telecommunications data including user credentials, call records, location information, billing details, and service configuration parameters. This type of vulnerability aligns with ATT&CK technique T1005 which focuses on data from local system storage, and T1074 which covers data staging through local data sources. The vulnerability's low attack complexity and lack of additional execution requirements make it particularly dangerous in environments where local access is common or easily obtained.
Organizations implementing telecom services must address this vulnerability through comprehensive permission model reviews and implementation of proper access control mechanisms. The recommended mitigations include enforcing strict permission checks at all service interfaces, implementing role-based access controls, and conducting regular security audits of permission enforcement code paths. Additionally, organizations should implement monitoring and logging of access attempts to detect potential exploitation attempts. The remediation process should involve code review of all telecom service components to ensure proper implementation of authorization checks and integration of automated security testing into development pipelines to prevent similar issues from emerging in future releases.