CVE-2003-1594 in NetWare
Summary
by MITRE
NWFTPD.nlm before 5.04.05 in the FTP server in Novell NetWare 6.5 does not properly enforce FTPREST.TXT settings, 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-2003-1594 affects the NWFTPD.nlm FTP server component in Novell NetWare 6.5 systems prior to version 5.04.05. This represents a critical access control flaw that undermines the security mechanisms designed to protect file system resources within the NetWare environment. The vulnerability specifically targets the enforcement of FTPREST.TXT configuration settings, which are intended to control access permissions and restrict unauthorized file operations. The flaw allows malicious actors to circumvent these security controls during active FTP sessions, potentially gaining access to restricted files and directories that should remain protected.
The technical implementation of this vulnerability stems from improper validation of FTPREST.TXT settings within the NWFTPD.nlm module. When users establish FTP sessions to the NetWare server, the system should enforce the access restrictions defined in the FTPREST.TXT configuration file to prevent unauthorized operations. However, the flaw in the software implementation fails to properly validate or enforce these restrictions, allowing attackers to manipulate their session permissions and bypass intended access controls. This represents a classic privilege escalation vulnerability where an attacker can elevate their effective access level beyond what the system configuration permits.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it fundamentally compromises the integrity of the NetWare file system security model. Attackers can exploit this flaw to access sensitive corporate data, modify critical system files, or potentially establish persistent access points within the network infrastructure. The vulnerability is particularly dangerous because it operates at the protocol level, making detection more challenging and allowing attackers to remain undetected while performing unauthorized operations. Network administrators face significant risk as this flaw could enable data exfiltration, system compromise, or disruption of business operations depending on the sensitivity of the restricted resources.
Mitigation strategies for CVE-2003-1594 should prioritize immediate patch deployment to update NWFTPD.nlm to version 5.04.05 or later, which contains the necessary fixes to properly enforce FTPREST.TXT settings. Organizations should also implement network segmentation to limit access to NetWare servers and establish monitoring procedures to detect anomalous FTP session behavior. Security configurations should be reviewed to ensure that FTPREST.TXT files are properly configured with the most restrictive access controls possible. Additionally, administrators should consider implementing network intrusion detection systems that can identify suspicious FTP protocol operations and establish baseline behavioral patterns to detect potential exploitation attempts. This vulnerability aligns with CWE-284, which addresses improper access control, and maps to ATT&CK technique T1078 for valid accounts and T1041 for data compression, as attackers could leverage this access to exfiltrate sensitive information through compressed archives. The remediation process should include comprehensive testing to ensure that the patch does not introduce compatibility issues with existing network services while verifying that proper access controls are restored.