CVE-2000-0164 in Solaris ISP Server
Summary
by MITRE
The installation of Sun Internet Mail Server (SIMS) creates a world-readable file that allows local users to obtain passwords.
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Analysis
by VulDB Data Team • 04/20/2026
The Sun Internet Mail Server (SIMS) vulnerability identified as CVE-2000-0164 represents a critical access control flaw that emerged from improper file permission configurations during the installation process. This vulnerability specifically affects the installation procedure of SIMS version 1.2 and earlier, where the software creates configuration files with overly permissive access controls. The flaw stems from the installation script failing to properly set file permissions, resulting in sensitive password information being stored in world-readable files that can be accessed by any local user on the system. This represents a fundamental failure in the principle of least privilege and demonstrates poor security hygiene in the software deployment lifecycle. The vulnerability is classified under CWE-732 as an Incorrect Permission Assignment for Critical Resources, which directly impacts the confidentiality and integrity of the system's authentication mechanisms.
The technical implementation of this vulnerability occurs when the SIMS installation process generates password files with permissions set to allow read access for all users on the system. These files typically contain hashed or plaintext passwords for administrative accounts, service accounts, or user credentials that are essential for maintaining system security. The flaw exists in the installation script's handling of file permissions, where it fails to properly restrict access to these sensitive configuration files. Attackers can exploit this by simply navigating to the installation directory and reading the world-readable password files, thereby gaining unauthorized access to system credentials without requiring additional authentication or exploitation techniques. This type of vulnerability is particularly dangerous because it requires no network connectivity or complex attack vectors, making it easily exploitable by local users with basic system access.
The operational impact of CVE-2000-0164 extends beyond simple credential theft, as it fundamentally undermines the security posture of systems running affected versions of SIMS. Local users who gain access to these password files can escalate their privileges within the system, potentially leading to full administrative control over the mail server and its associated services. The vulnerability also creates a persistent threat vector that remains active until the installation is properly repaired or the system is reinstalled with updated software. Organizations using affected SIMS versions face significant risks including unauthorized access to email communications, potential data breaches, and compromise of user accounts. This vulnerability particularly affects environments where multiple users share the same system or where security is not properly enforced at the local level. The impact is further compounded by the fact that the vulnerability can be exploited by users who may have legitimate access to the system but should not have access to administrative credentials.
Mitigation strategies for this vulnerability require immediate action to correct the file permissions on existing installations, typically involving manual correction of file access controls or complete reinstallation of the software with proper permissions. System administrators should conduct thorough audits of all installed SIMS components to identify and correct world-readable password files, ensuring that sensitive configuration data is protected with appropriate access controls. The recommended approach includes setting restrictive permissions on password files, typically using chmod 600 or equivalent access control mechanisms that prevent unauthorized access while maintaining necessary functionality. Organizations should also implement regular security assessments to identify similar permission-related vulnerabilities in other software installations, as this represents a common class of security flaws that can be prevented through proper installation procedures and access control policies. This vulnerability demonstrates the critical importance of secure configuration management and proper implementation of access control mechanisms during software deployment, aligning with security frameworks such as the NIST Cybersecurity Framework and ISO 27001 requirements for secure system administration.