CVE-2023-38544 in Secure Access Linux
Summary
by MITRE • 11/15/2023
A logged in user can modify specific files that may lead to unauthorized changes in system-wide configuration settings. This vulnerability could be exploited to compromise the integrity and security of the network on the affected system.
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Analysis
by VulDB Data Team • 12/10/2023
This vulnerability represents a critical privilege escalation issue that allows authenticated users to manipulate system-wide configuration files through improper access controls. The flaw exists in the application's file permission handling mechanisms, where specific configuration files are accessible to regular users with login credentials rather than being restricted to administrative privileges. This represents a direct violation of the principle of least privilege and demonstrates inadequate mandatory access controls that should prevent unauthorized modification of critical system components. The vulnerability stems from improper file system permissions and potentially flawed security models that fail to properly validate user privileges before allowing file operations.
The technical implementation of this vulnerability enables an attacker with valid login credentials to alter configuration files that control system behavior and security parameters. This type of flaw typically manifests as insufficient input validation and access control checks within the application's file handling routines. The vulnerability may be categorized under CWE-276 which describes improper file permissions or CWE-732 which addresses incorrect permissions for critical resources. The operational impact extends beyond simple file modification as these configuration changes can alter network behavior, security policies, and system access controls, potentially creating backdoors or disabling security mechanisms.
From an attack perspective, this vulnerability aligns with ATT&CK technique T1068 which involves exploiting legitimate credentials to gain access to systems, and T1546 which covers changes to system settings. The exploitation process typically begins with user authentication followed by identification of vulnerable configuration files and subsequent modification of these files to achieve persistent access or privilege escalation. Network compromise becomes possible as system-wide configuration changes can redirect traffic, disable security features, or establish persistent access points. The vulnerability's impact is particularly severe because it allows attackers to modify core system parameters that govern network behavior and security enforcement mechanisms.
Mitigation strategies should focus on implementing proper access control mechanisms and privilege separation for configuration files. System administrators should conduct comprehensive file permission reviews to ensure that critical configuration files are restricted to appropriate administrative users only. The implementation of role-based access controls and regular security audits can help identify and remediate similar vulnerabilities. Additionally, application-level security measures such as input validation, file integrity monitoring, and privilege escalation checks should be strengthened. Regular patch management and security updates are essential to address the underlying issues that enable this type of unauthorized modification. Organizations should also implement monitoring solutions that can detect unauthorized changes to critical system configuration files and alert security teams to potential compromise attempts.