CVE-2015-7598 in Authentication Service TokenValidator Proxy Agent
Summary
by MITRE
SafeNet Authentication Service TokenValidator Proxy Agent uses a weak ACL for unspecified installation directories and executable modules, which allows local users to gain privileges by modifying an executable module.
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Analysis
by VulDB Data Team • 01/09/2020
The SafeNet Authentication Service TokenValidator Proxy Agent vulnerability represents a critical access control flaw that undermines the security posture of authentication systems relying on this component. This weakness manifests in the form of insufficient access control lists within unspecified installation directories and executable modules, creating an exploitable condition that allows local attackers to escalate their privileges. The vulnerability exists at the operating system level where proper file system permissions are not enforced, enabling malicious users to modify critical system executables without appropriate authorization. This flaw directly impacts the integrity and confidentiality of authentication processes, as the compromised executable modules can be manipulated to execute arbitrary code with elevated privileges. The vulnerability's classification aligns with CWE-276, which addresses improper file permissions, and represents a significant concern for enterprise environments where authentication services are critical infrastructure components.
The technical exploitation of this vulnerability requires local system access, making it particularly dangerous in environments where privilege separation is not properly enforced. Attackers can leverage this weakness to modify executable modules within the installation directories, potentially injecting malicious code or altering existing functionality to redirect authentication flows. The weak ACL implementation suggests that the software installation process does not properly set restrictive permissions on critical files, allowing any local user to modify or replace executable components. This type of privilege escalation vulnerability is particularly concerning because it can be exploited by attackers who have already gained access to a system through other means, such as credential theft or social engineering attacks. The attack vector is classified under ATT&CK technique T1068, which involves exploiting local system permissions to escalate privileges, and T1059, which encompasses executing malicious code through compromised system components.
The operational impact of CVE-2015-7598 extends beyond simple privilege escalation, as it can compromise the entire authentication infrastructure that relies on SafeNet Authentication Service. When local users can modify executable modules, they gain the ability to manipulate authentication processes, potentially allowing them to bypass security controls, impersonate legitimate users, or create backdoors for persistent access. This vulnerability undermines the trust model of the authentication service, as compromised executables can alter how authentication decisions are made, potentially allowing unauthorized access to protected resources. Organizations using this service may experience cascading security failures, as compromised authentication modules can affect multiple applications and systems that depend on the authentication service for access control. The vulnerability's impact is particularly severe in environments where the authentication service is used for critical access control decisions, such as enterprise network access, database authentication, or application-level security controls.
Mitigation strategies for this vulnerability should focus on implementing proper file system permissions and access control measures to prevent unauthorized modifications to critical executable modules. System administrators should immediately review and correct the ACL settings on all installation directories and executable files associated with the SafeNet Authentication Service, ensuring that only authorized users and processes can modify these components. The recommended approach involves applying restrictive permissions using standard operating system capabilities such as windows file permissions or unix/linux file access control lists, limiting write access to system administrators or specific service accounts. Organizations should also implement regular security audits to verify that proper access controls are maintained and consider applying security patches or updates from the vendor that address this specific ACL weakness. Additionally, implementing principle of least privilege controls and monitoring for unauthorized file modifications can help detect and prevent exploitation attempts. The remediation process should align with security frameworks such as NIST SP 800-53 controls for access control and system configuration management, ensuring that the fix addresses the root cause rather than merely providing a temporary workaround.