CVE-1999-0383 in Tigris
Summary
by MITRE
ACC Tigris allows public access without a login.
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Analysis
by VulDB Data Team • 04/18/2026
The vulnerability described in CVE-1999-0383 affects the ACC Tigris application, which represents a significant security flaw in access control mechanisms. This issue falls under the category of improper access control vulnerabilities, specifically allowing unauthorized users to gain access to protected resources without proper authentication. The flaw essentially creates an open door mechanism where public access is granted without requiring any login credentials or authentication processes. Such a vulnerability directly violates fundamental security principles and represents a critical weakness in the application's security architecture. The impact extends beyond simple information disclosure as it allows complete unauthorized access to the system's resources and functionality.
The technical implementation of this vulnerability stems from inadequate authentication checks within the ACC Tigris application. When users attempt to access the system, the application fails to properly validate their credentials or identity before granting access. This could be due to missing authentication routines, improperly configured access controls, or flawed session management mechanisms. The vulnerability operates at the application level where the security boundary is completely bypassed, allowing any external user to access the system's functionality. This flaw represents a classic example of a security misconfiguration that enables privilege escalation and unauthorized system access. According to CWE standards, this maps to CWE-285, which deals with improper authorization issues in software applications. The vulnerability essentially creates a backdoor that circumvents the normal authentication flow, making it particularly dangerous for systems handling sensitive data or critical operations.
The operational impact of this vulnerability is severe and multifaceted, potentially leading to data breaches, system compromise, and unauthorized modifications to application resources. An attacker exploiting this vulnerability could gain complete access to the application's functionality, potentially leading to data exfiltration, system manipulation, or disruption of services. The vulnerability affects the confidentiality, integrity, and availability of the system's resources, creating a triad of security concerns. Organizations relying on ACC Tigris for critical operations would face significant risks including regulatory compliance violations, financial losses, and reputational damage. The attack surface expands dramatically as any individual with network access can exploit this vulnerability without requiring specific credentials or specialized knowledge. From an ATT&CK framework perspective, this vulnerability maps to techniques involving initial access through unsecured services and privilege escalation via weak access controls, making it a critical target for exploitation by threat actors.
Mitigation strategies for this vulnerability must address the core authentication and authorization mechanisms within the ACC Tigris application. Organizations should implement proper authentication protocols including username/password verification, multi-factor authentication, and secure session management. The application architecture needs to be reviewed to ensure that all access points require proper credential validation before granting system access. Security patches and updates should be applied immediately to correct the authentication bypass flaw, and access controls should be configured to enforce proper authorization checks. Network segmentation and firewall rules can provide additional protection layers to limit access to the application. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in the system. The implementation of proper logging and monitoring mechanisms is essential to detect unauthorized access attempts and respond to potential exploitation attempts. Organizations should also consider implementing role-based access controls to ensure that even if unauthorized access occurs, the scope of damage is limited by proper privilege management.