CVE-2001-1020 in Directory Manager
Summary
by MITRE
edit_image.php in Vibechild Directory Manager before 0.91 allows remote attackers to execute arbitrary commands via shell metacharacters in the userfile_name parameter, which is sent unfiltered to the PHP passthru function.
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Analysis
by VulDB Data Team • 09/30/2025
The vulnerability identified as CVE-2001-1020 resides within the Vibechild Directory Manager software version 0.90 and earlier, presenting a critical remote code execution flaw that directly impacts the security posture of affected systems. This vulnerability specifically targets the edit_image.php component which processes user input without proper sanitization, creating an avenue for malicious actors to inject and execute arbitrary commands on the target server. The flaw manifests when the userfile_name parameter is submitted through the web interface and subsequently passed unfiltered to the PHP passthru function, which executes system commands directly, bypassing normal input validation mechanisms.
The technical implementation of this vulnerability aligns with CWE-77, known as "Improper Neutralization of Special Elements used in a Command ('Command Injection')", which describes the dangerous practice of incorporating untrusted data directly into command execution contexts without proper sanitization or encoding. The vulnerability operates through a classic command injection vector where attacker-controlled input flows directly into the passthru function, which acts as a bridge between the web application and the underlying operating system. This allows threat actors to execute any command that the web server process has permissions to run, potentially leading to complete system compromise. The vulnerability is particularly dangerous because it requires no authentication to exploit, making it accessible to any remote attacker with knowledge of the affected application's URL structure.
The operational impact of this vulnerability extends far beyond simple data theft or service disruption, as it provides attackers with the capability to establish persistent access, escalate privileges, and conduct reconnaissance activities within the compromised environment. Attackers can leverage this vulnerability to execute system commands such as creating backdoor accounts, installing malware, exfiltrating sensitive data, or using the compromised server as a launch point for further attacks against internal networks. The vulnerability also demonstrates a critical flaw in input validation practices, where the application fails to implement proper security controls to prevent malicious input from reaching system execution functions. This represents a fundamental breakdown in the application's security architecture, as it fails to apply the principle of least privilege and input sanitization that are standard requirements in secure software development practices.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements to prevent similar issues from occurring in the future. The primary fix involves implementing proper input validation and sanitization techniques, specifically ensuring that all user-supplied data passed to system execution functions undergoes rigorous filtering and encoding. Organizations should apply the vendor-provided patch for Vibechild Directory Manager version 0.91 or later, which addresses this specific command injection vulnerability. Additionally, implementing web application firewalls, input validation libraries, and regular security code reviews can help prevent similar injection flaws. The remediation process should also include disabling unnecessary system commands, implementing proper access controls, and establishing monitoring procedures to detect unauthorized command execution attempts. This vulnerability serves as a stark reminder of the importance of following secure coding practices and adhering to established security frameworks such as OWASP Top Ten and NIST cybersecurity guidelines to prevent command injection attacks that can lead to complete system compromise and unauthorized access to critical infrastructure resources.