CVE-1999-0895 in Firewall-1
Summary
by MITRE
Firewall-1 does not properly restrict access to LDAP attributes.
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Analysis
by VulDB Data Team • 04/19/2026
The vulnerability described in CVE-1999-0895 affects Check Point Firewall-1, a network security solution that implements access control policies and provides firewall services. This issue specifically relates to the improper handling of Lightweight Directory Access Protocol attributes within the firewall's access control mechanisms. The flaw exists in the way Firewall-1 processes and enforces access restrictions on directory services, creating potential security gaps in environments that rely on LDAP for user authentication and authorization.
The technical implementation flaw stems from inadequate validation and filtering of LDAP attribute access within Firewall-1's security policy enforcement engine. When the firewall processes requests for LDAP directory services, it fails to properly validate or restrict access to sensitive directory attributes that should be protected by access control policies. This misconfiguration allows unauthorized access to directory information that should remain restricted, potentially exposing sensitive user data, group memberships, or other directory attributes that are critical for maintaining security boundaries. The vulnerability operates at the application layer, specifically affecting the directory service integration capabilities of the firewall system.
The operational impact of this vulnerability is significant for organizations relying on Firewall-1 for network security. Attackers who can exploit this weakness may gain access to sensitive directory information that could be used for further attacks, including credential harvesting, privilege escalation, or social engineering operations. The exposure of LDAP attributes could reveal user accounts, group memberships, organizational hierarchies, and other directory information that would otherwise be protected by proper access controls. This vulnerability directly violates the principle of least privilege and could enable attackers to map network environments more effectively, potentially leading to broader compromise of the protected network infrastructure. Organizations using Firewall-1 in environments with sensitive directory services are particularly at risk.
Mitigation strategies for this vulnerability should focus on implementing proper access control policies and ensuring that Firewall-1 is properly configured to restrict LDAP attribute access according to security best practices. Organizations should review and update their Firewall-1 policies to explicitly define and enforce restrictions on LDAP attribute access, implementing granular controls that limit access to directory information based on user roles and security requirements. The solution involves configuring proper access control lists and ensuring that the firewall's LDAP integration properly validates and filters attribute access requests. Additionally, organizations should consider implementing network segmentation and monitoring to detect unauthorized access attempts to directory services, while also ensuring that all firewall components are updated with the latest security patches from Check Point. This vulnerability aligns with CWE-284, which addresses improper access control, and could be leveraged by threat actors following ATT&CK technique T1078 for valid accounts or T1566 for social engineering attacks.