CVE-2000-1106 in Interscan Viruswall
Summary
by MITRE
Trend Micro InterScan VirusWall creates an "Intscan" share to the "InterScan" directory with permissions that grant Full Control permissions to the Everyone group, which allows attackers to gain privileges by modifying the VirusWall programs.
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Analysis
by VulDB Data Team • 04/06/2019
The vulnerability identified as CVE-2000-1106 represents a critical access control flaw within Trend Micro InterScan VirusWall, a network security solution designed to protect enterprise environments from malicious software threats. This weakness stems from the software's improper configuration of shared resources, creating a persistent security risk that directly undermines the integrity of the protected system. The vulnerability specifically manifests through the creation of an "Intscan" share point that exposes the "InterScan" directory to unauthorized access. This misconfiguration grants the Everyone group full control permissions over the shared directory, effectively providing any attacker with complete administrative privileges over the virus wall components. The flaw exists at the operating system level where file system permissions are improperly set, creating an attack surface that can be exploited by malicious actors without requiring elevated privileges or specialized knowledge of the system architecture.
From a technical perspective, this vulnerability directly maps to CWE-264, which describes permissions, privileges, and access control issues within software systems. The implementation flaw occurs during the installation process where Trend Micro fails to properly configure share permissions, leaving the system in a state where unauthorized users can modify critical security components. The Intscan share serves as an entry point for attackers to manipulate core virus wall functionality, potentially allowing them to disable security features, modify detection signatures, or inject malicious code into the system. The vulnerability's impact is amplified by the fact that it affects the core security infrastructure rather than merely application data, making it particularly dangerous for enterprise environments where network protection is paramount. Attackers can leverage this weakness to achieve privilege escalation without requiring authentication, as the Everyone group permission model provides unrestricted access to the shared resources.
The operational implications of CVE-2000-1106 extend beyond simple unauthorized access, as it fundamentally compromises the security posture of organizations using Trend Micro InterScan VirusWall. This vulnerability can be exploited through various attack vectors including network reconnaissance, social engineering, or by simply connecting to the network and accessing the shared resources. The attack surface is particularly concerning because it affects the network security gateway itself, meaning that successful exploitation could allow attackers to bypass all network security controls implemented by the virus wall. According to ATT&CK framework, this vulnerability aligns with T1078 (Valid Accounts) and T1547 (Registry Run Keys) techniques, as attackers can leverage the shared access to modify system configurations and establish persistence. The vulnerability also represents a significant risk for organizations under compliance requirements such as pci dss, hipaa, and iso 27001, where maintaining proper access controls is mandatory for security certification.
Mitigation strategies for CVE-2000-1106 require immediate action to correct the share permissions and implement proper access controls. Organizations should immediately remove the problematic Intscan share or modify its permissions to restrict access to authorized personnel only. The recommended approach involves configuring the share to use explicit user permissions rather than the default Everyone group access, ensuring that only legitimate administrators can access the InterScan directory. System administrators should also implement regular security audits to verify that no unauthorized shares exist within the network security infrastructure. Additionally, organizations should consider implementing network segmentation to limit access to critical security components and establish monitoring protocols to detect unauthorized access attempts. The vulnerability underscores the importance of proper security configuration management and demonstrates how seemingly minor configuration errors can create significant security risks. Organizations should also implement patch management processes to ensure that security updates are applied promptly, as this vulnerability was addressed in subsequent versions of the Trend Micro software. Regular security assessments should include verification of shared resource permissions as part of baseline security configurations to prevent similar issues from occurring in other network security components.