CVE-2003-1596 in NetWare
Summary
by MITRE
NWFTPD.nlm before 5.03.12 in the FTP server in Novell NetWare does not properly restrict filesystem use by anonymous users with NFS Gateway home directories, which allows remote attackers to bypass intended access restrictions via an FTP session.
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Analysis
by VulDB Data Team • 05/04/2026
The vulnerability identified as CVE-2003-1596 affects NWFTPD.nlm, a component of Novell NetWare's FTP server software, specifically versions prior to 5.03.12. This issue represents a significant security flaw in the handling of anonymous user sessions when NFS Gateway home directories are configured, creating a path for unauthorized access that directly contradicts the intended security model of the system. The vulnerability stems from improper filesystem access controls that fail to adequately restrict anonymous user activities, particularly when they are configured to use NFS Gateway home directories as their default locations.
The technical implementation of this flaw occurs within the FTP server's permission handling mechanisms where anonymous users are granted access to filesystem resources without proper boundary enforcement. When anonymous users connect through FTP sessions and their home directories are configured via NFS Gateway, the system fails to apply appropriate access controls that would normally prevent such users from traversing or accessing filesystem elements beyond their intended scope. This misconfiguration allows attackers to exploit the gap in access control enforcement by manipulating their FTP session parameters to gain access to restricted filesystem areas that should remain unavailable to anonymous users.
The operational impact of this vulnerability extends beyond simple unauthorized file access, creating potential for broader system compromise and data exposure. Attackers can leverage this flaw to bypass intended access restrictions that are fundamental to maintaining secure file transfer operations within enterprise networks. The vulnerability particularly affects organizations relying on Novell NetWare environments where FTP services are configured with NFS Gateway integration, potentially exposing sensitive corporate data, system files, and user information that should remain protected from anonymous access attempts. This weakness undermines the core security principles of network access control and privilege management within the affected systems.
Organizations should implement immediate mitigations including upgrading to NWFTPD.nlm version 5.03.12 or later, which contains the necessary patches to address the improper filesystem access controls. Security administrators should also review existing FTP configurations to ensure that anonymous user access is properly restricted and that NFS Gateway home directory mappings do not inadvertently provide elevated access privileges. Network segmentation and additional access control measures should be implemented to limit the potential impact of any exploitation attempts. The vulnerability aligns with CWE-284, which addresses improper access control, and represents a clear violation of the principle of least privilege that is fundamental to secure system design. From an ATT&CK framework perspective, this vulnerability maps to privilege escalation and credential access techniques, as attackers can leverage it to gain unauthorized access to restricted system resources that would normally be protected by proper access controls.