CVE-2023-40635 in SC9863A
Summary
by MITRE • 10/25/2023
In linkturbo, there is a possible missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed
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Analysis
by VulDB Data Team • 10/25/2023
The vulnerability identified as CVE-2023-40635 affects the linkturbo software component and represents a critical authorization flaw that could enable local privilege escalation without requiring additional execution privileges. This issue stems from a missing permission check within the software's access control mechanisms, creating a significant security gap that adversaries can exploit to gain elevated system privileges. The vulnerability manifests in scenarios where unauthorized local users can leverage this flaw to execute privileged operations that should be restricted to authorized personnel or system processes.
The technical implementation of this vulnerability involves a failure in the software's permission validation system where proper access controls are not enforced during critical operations. This missing permission check typically occurs when the application fails to verify whether the current user context has sufficient privileges to perform specific actions, allowing unauthorized execution of privileged code paths. The flaw operates at the system level where local users can manipulate the software's normal execution flow to bypass authorization checks, potentially gaining root or administrative privileges. This type of vulnerability aligns with CWE-284 which specifically addresses improper access control and improper privilege management issues in software systems.
The operational impact of CVE-2023-40635 extends beyond simple privilege escalation as it creates a persistent security weakness that can be exploited by both malicious insiders and external attackers with local access. Once exploited, this vulnerability allows attackers to execute arbitrary code with elevated privileges, potentially leading to complete system compromise, data exfiltration, or the installation of persistent backdoors. The lack of additional execution privileges required for exploitation makes this vulnerability particularly dangerous as it can be leveraged by attackers who already have basic system access. This characteristic places the vulnerability in the ATT&CK framework under privilege escalation techniques where adversaries can move laterally within compromised systems to achieve greater control.
Organizations should prioritize immediate remediation of this vulnerability through software updates from the vendor, as the missing permission check creates a fundamental security flaw that can be exploited without complex attack vectors. The mitigation strategy should include comprehensive system hardening measures, including regular security assessments, monitoring for unauthorized privilege escalation attempts, and implementation of principle of least privilege policies. Additionally, system administrators should conduct thorough vulnerability scans to identify systems running affected linkturbo software versions and ensure that all local accounts are properly managed with appropriate access controls. The vulnerability's nature as a permission check failure also necessitates regular audit of system access controls and implementation of proper logging mechanisms to detect potential exploitation attempts.