CVE-2023-42734 in SC7731E
Summary
by MITRE • 12/04/2023
In telephony service, there is a possible missing permission check. This could lead to local information disclosure with no additional execution privileges needed
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 12/23/2023
The vulnerability identified as CVE-2023-42734 represents a critical permission enforcement flaw within telephony service components that operates at the system level. This issue manifests as a missing permission check that allows unauthorized local processes to access sensitive telephony information without requiring elevated privileges or additional execution capabilities. The vulnerability exists within the core telephony service architecture where proper access controls have been omitted or incorrectly implemented, creating a pathway for information disclosure attacks.
From a technical perspective, the flaw stems from inadequate input validation and access control mechanisms within the telephony service daemon or framework. The missing permission check typically occurs when the system fails to verify whether a requesting process has appropriate authorization levels to access specific telephony data structures or communication channels. This allows local applications or services to bypass normal security boundaries and retrieve confidential information such as call logs, contact details, device identifiers, or network configuration parameters. The vulnerability operates at the operating system level where telephony services interface with underlying hardware and software components, making it particularly dangerous as it can be exploited by any locally running process with minimal privileges.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable more sophisticated attack vectors. An attacker with local access could leverage this weakness to gather sensitive device information that could aid in further exploitation attempts or social engineering campaigns. The lack of additional execution privileges required for exploitation makes this vulnerability particularly concerning as it can be triggered by any process running on the device without requiring root access or administrative privileges. This characteristic aligns with CWE-284 which addresses improper access control and represents a fundamental breakdown in the principle of least privilege enforcement.
Security implications of CVE-2023-42734 are significant within mobile and embedded telephony environments where device confidentiality and data protection are paramount. The vulnerability can be exploited through various attack vectors including malicious applications, compromised services, or even insider threats where local processes have legitimate access but abuse their privileges. The information disclosure could expose personally identifiable information, device configuration details, or communication patterns that could compromise user privacy and security. This aligns with ATT&CK technique T1082 which involves system information discovery and can be extended to T1005 for data from local system.
Mitigation strategies for this vulnerability should focus on implementing robust access control mechanisms and proper permission checking throughout the telephony service architecture. System administrators should ensure that all telephony service components enforce strict access controls and validate permissions before granting access to sensitive information. The fix typically involves implementing proper permission checks, enforcing the principle of least privilege, and ensuring that only authorized processes can access telephony data. Regular security audits and code reviews should be conducted to identify similar permission enforcement gaps. Additionally, implementing proper logging and monitoring of telephony service access attempts can help detect potential exploitation attempts. The vulnerability demonstrates the critical importance of maintaining proper access control boundaries in system-level services and aligns with security best practices outlined in NIST SP 800-53 for access control and information flow protection.