CVE-2023-33883 in SC9863A
Summary
by MITRE • 07/12/2023
In telephony 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 • 08/02/2023
The vulnerability identified as CVE-2023-33883 resides within telephony service implementations where a critical missing permission check has been discovered. This flaw represents a significant security weakness that allows unauthorized access to sensitive telephony information without requiring any additional execution privileges or elevated permissions. The vulnerability specifically affects the telephony service component which handles various communication protocols and data processing functions essential for voice and data transmission services.
The technical flaw stems from inadequate authorization controls within the telephony service architecture where proper permission validation mechanisms have been omitted or bypassed. This missing permission check creates an avenue for local information disclosure attacks where malicious actors can access telephony-related data that should normally be restricted to authorized processes or users. The vulnerability operates at the service level where access controls should enforce strict boundaries between different operational components and user contexts. According to CWE classification, this represents a weakness in permission checking mechanisms under CWE-284, which specifically addresses inadequate access control implementations.
The operational impact of this vulnerability extends beyond simple information disclosure as it can potentially expose sensitive communication data including call logs, contact information, voice messages, and telephony configuration parameters. Attackers exploiting this vulnerability can gain unauthorized access to telephony service data without requiring additional privileges, making the attack surface significantly larger than typical local information disclosure scenarios. The lack of additional execution privileges needed means that even basic user accounts or unprivileged processes can potentially exploit this flaw, amplifying the risk to organizations that rely heavily on telephony services for business operations. This vulnerability directly impacts the confidentiality aspect of the CIA triad and can lead to privacy violations and potential data breaches.
Organizations should implement immediate mitigations including verifying and strengthening permission checks within telephony service components, implementing proper access control lists, and ensuring that all telephony service operations enforce appropriate authorization mechanisms. The remediation process should involve code review to identify all instances where permission checks are missing, followed by implementation of proper authorization frameworks. Security teams should also consider deploying monitoring solutions to detect unauthorized access attempts to telephony service components. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and credential access, specifically targeting T1078 for valid accounts and T1566 for social engineering approaches that could exploit such weak permission controls. Regular security assessments and vulnerability scanning should be conducted to identify similar permission checking gaps in other service components and ensure comprehensive protection against similar threats.