CVE-2000-0074 in Plusmail
Summary
by MITRE
PowerScripts PlusMail CGI program allows remote attackers to execute commands via a password file with improper permissions.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/19/2025
The vulnerability identified as CVE-2000-0074 resides within the PowerScripts PlusMail CGI program, a web-based email management solution that was widely deployed in enterprise environments during the late 1990s and early 2000s. This particular flaw represents a classic privilege escalation vulnerability that exploited weak file permission controls within the application's authentication mechanism. The vulnerability specifically targeted the password file handling functionality, which was designed to store user credentials and authentication data for the PlusMail system. When the application failed to properly validate or restrict access permissions on the password file, it created an avenue for unauthorized individuals to gain elevated privileges and execute arbitrary commands on the underlying system. This type of vulnerability falls under the broader category of improper access control issues that have been consistently documented in security frameworks including CWE-284, which specifically addresses improper access control.
The technical implementation of this vulnerability stemmed from the application's failure to enforce proper file system permissions on critical configuration files. When the PlusMail CGI program was installed, it would create password files that were intended to contain sensitive authentication data. However, due to improper configuration or default installation settings, these password files were often created with overly permissive access controls that allowed any user account on the system to read or modify the contents. This misconfiguration enabled remote attackers to not only access the password file but also to manipulate its contents, effectively allowing them to bypass authentication mechanisms entirely. The flaw was particularly dangerous because it leveraged the principle of least privilege violation, where system resources were not properly secured according to security best practices and industry standards.
The operational impact of this vulnerability was severe and far-reaching, particularly in environments where the PlusMail system was used for critical email services. Remote attackers who successfully exploited this vulnerability could execute commands with the privileges of the web server process, which often ran with elevated system permissions. This typically meant that attackers could gain access to sensitive data, modify email configurations, or even take complete control of the server hosting the PlusMail application. The vulnerability was especially concerning because it required minimal technical expertise to exploit, making it a popular target for automated attacks and malicious actors who sought to compromise email infrastructure. The attack vector was particularly dangerous as it could be executed remotely without requiring any prior authentication or local access to the system, aligning with the ATT&CK framework's concept of remote code execution techniques.
Mitigation strategies for CVE-2000-0074 required immediate attention to system configuration and access control policies. Organizations needed to implement proper file permission controls on all password files and configuration data, ensuring that these sensitive resources were only accessible to authorized processes and users. The most effective immediate fix involved changing file permissions to restrict access to the password file to only the web server process and system administrators, typically requiring chmod operations to set restrictive permissions such as 600 or 640. Additionally, security administrators should have implemented regular audits of file permissions and access controls to detect and prevent similar misconfigurations. This vulnerability highlighted the importance of proper system hardening practices and adherence to security baselines, particularly in web application environments where CGI programs were prevalent. The incident underscored the critical need for proper privilege management and access control implementation as outlined in various security standards including those from the Center for Internet Security and NIST guidelines for secure system configuration.