CVE-2000-0062 in Zope
Summary
by MITRE
The DTML implementation in the Z Object Publishing Environment (Zope) allows remote attackers to conduct unauthorized activities.
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Analysis
by VulDB Data Team • 06/23/2021
The vulnerability identified as CVE-2000-0062 represents a critical security flaw within the Z Object Publishing Environment Zope platform, specifically affecting its Dynamic Template Markup Language DTML implementation. This vulnerability exists within the web application framework that was widely used for building dynamic web applications in the late 1990s and early 2000s. The DTML system serves as a templating mechanism that allows developers to create dynamic web content by embedding programming logic within HTML templates, making it a core component of Zope's functionality and a potential attack surface for malicious actors.
The technical flaw stems from insufficient input validation and sanitization within the DTML processing engine, which permits remote attackers to inject arbitrary code or commands through carefully crafted DTML expressions. When the Zope server processes DTML templates containing malicious input, the system fails to properly sanitize user-supplied data before executing template logic, creating an environment where unauthorized code execution becomes possible. This vulnerability specifically targets the way Zope handles template variables and expressions, allowing attackers to bypass normal access controls and potentially execute arbitrary commands on the server. The flaw operates at the application layer, making it particularly dangerous as it can be exploited without requiring direct system access or knowledge of underlying server configurations.
The operational impact of this vulnerability extends far beyond simple data theft or service disruption, as it provides attackers with the capability to gain full administrative control over affected Zope servers. Successful exploitation can result in complete system compromise, allowing attackers to modify or delete content, access sensitive data, install backdoors, or use the compromised server as a launch point for further attacks against the broader network infrastructure. Organizations running Zope applications were particularly vulnerable since many deployed these systems without proper security hardening or regular patching procedures. The vulnerability's remote exploitability means that attackers could leverage it from anywhere on the internet, making it a significant threat to web applications that had not yet implemented proper security measures or migrated to more modern frameworks.
Mitigation strategies for CVE-2000-0062 require immediate action from affected organizations, including applying the relevant security patches released by the Zope community and implementing proper input validation mechanisms within DTML templates. Organizations should also consider implementing network-level protections such as firewalls and intrusion detection systems to monitor for exploitation attempts. The vulnerability aligns with CWE-94, which describes "Improper Control of Generation of Code ('Code Injection')" and relates to ATT&CK technique T1059.007 for "Command and Scripting Interpreter: Windows Command Shell." Security practitioners should also conduct comprehensive audits of all DTML templates to identify and remediate potential injection points, while implementing proper access controls and authentication mechanisms. Additionally, organizations should consider migrating from legacy Zope implementations to more modern web application frameworks that have better security track records and more robust protection mechanisms against similar code injection vulnerabilities.