CVE-1999-1078 in WS_FTP Pro
Summary
by MITRE
WS_FTP Pro 6.0 uses weak encryption for passwords in its initialization files, which allows remote attackers to easily decrypt the passwords and gain privileges.
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Analysis
by VulDB Data Team • 04/19/2026
The vulnerability identified as CVE-1999-1078 affects WS_FTP Pro version 6.0, a widely used file transfer protocol client and server software that was prevalent during the late 1990s era of internet infrastructure. This weakness specifically resides in how the application handles password storage within its initialization files, creating a critical security flaw that directly impacts the confidentiality and integrity of authentication credentials. The vulnerability represents a classic example of poor cryptographic implementation where weak encryption algorithms were employed to protect sensitive data, fundamentally undermining the security posture of systems relying on this software. The flaw falls under the category of weak cryptographic algorithms as defined by CWE-327, which specifically addresses the use of insecure or weak cryptographic primitives that can be easily broken by adversaries.
The technical implementation of this vulnerability stems from WS_FTP Pro 6.0's decision to employ inadequate encryption mechanisms for storing passwords in configuration files rather than implementing proper cryptographic security measures. When users configured their FTP connections, the software would save login credentials in initialization files using encryption that was either trivially reversible or based on weak algorithms that could be easily cracked through brute force or pattern analysis. This approach directly violates fundamental security principles outlined in NIST SP 800-63 and other cryptographic standards that require robust encryption methods for protecting sensitive information. The weakness allows remote attackers to obtain the initialization files and subsequently decrypt the stored passwords, effectively bypassing the authentication mechanisms that should have protected the system. This vulnerability is particularly dangerous because it operates at the application layer and requires no special privileges to exploit, making it a prime target for automated attack tools that could scan for and exploit this weakness across multiple systems.
The operational impact of CVE-1999-1078 extends far beyond simple credential theft, as it enables attackers to gain unauthorized access to sensitive file systems and potentially escalate their privileges within the affected network. Once an attacker successfully decrypts the stored passwords, they can establish legitimate FTP connections to target systems, access restricted files, modify or delete data, and potentially use these credentials to access other systems within the network that may share similar authentication mechanisms. The vulnerability creates a persistent security risk because the compromised credentials can be reused across multiple sessions and may be shared across different applications or services that rely on the same authentication infrastructure. From an adversarial perspective, this vulnerability aligns with ATT&CK technique T1566 which involves credential harvesting through various means including the exploitation of weak encryption in configuration files. The attack vector is particularly concerning as it can be executed remotely without requiring physical access to the system, making it a significant threat to organizations that had not yet implemented comprehensive security monitoring and patch management processes.
Organizations affected by this vulnerability should immediately implement remediation measures that include updating to patched versions of WS_FTP Pro that properly implement strong encryption for password storage, typically using industry-standard algorithms such as AES-256 or similar robust cryptographic methods. The solution should also involve implementing additional security controls such as regular monitoring of configuration files for unauthorized access, implementing network segmentation to limit the impact of credential compromise, and establishing comprehensive patch management procedures to ensure all software components are kept up-to-date with security fixes. Security professionals should also consider implementing credential rotation policies that require regular password changes for all accounts that may have been exposed through this vulnerability, along with enhanced logging and alerting mechanisms to detect potential unauthorized access attempts. The remediation process must address both the immediate vulnerability and broader security practices that could prevent similar weaknesses in other applications, emphasizing the importance of cryptographic best practices and secure coding standards that align with industry frameworks such as the OWASP Top Ten and NIST cybersecurity guidelines.