CVE-2001-0569 in Zope
Summary
by MITRE
Digital Creations Zope 2.3.1 b1 and earlier contains a problem in the method return values related to the classes (1) ObjectManager, (2) PropertyManager, and (3) PropertySheet.
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Analysis
by VulDB Data Team • 05/31/2019
The vulnerability identified as CVE-2001-0569 affects Digital Creations Zope 2.3.1 beta 1 and earlier versions, representing a critical security flaw in the core object management components of this web application framework. This issue specifically targets three fundamental classes within the Zope architecture: ObjectManager, PropertyManager, and PropertySheet, which form the backbone of how the system handles object relationships and property management. The vulnerability stems from improper handling of method return values within these classes, creating potential pathways for unauthorized access and manipulation of the application's internal data structures.
The technical flaw manifests in how these classes process and return method values, particularly when dealing with object relationships and property access. When methods within ObjectManager, PropertyManager, or PropertySheet are invoked, the system fails to properly validate or sanitize the return values before they are processed by other components. This improper handling creates opportunities for attackers to manipulate the return values to access restricted objects or properties that should be protected by the system's access controls. The vulnerability is classified under CWE-20 as "Improper Input Validation" and represents a classic case of insufficient return value validation that can lead to privilege escalation or information disclosure.
The operational impact of this vulnerability extends beyond simple data exposure, as it can enable attackers to manipulate the object hierarchy within the Zope application. An attacker who successfully exploits this vulnerability could potentially gain access to objects that should be restricted, modify property values in ways that affect application behavior, or even escalate privileges within the system. The implications are particularly severe because ObjectManager handles object relationships, PropertyManager manages object properties, and PropertySheet deals with property sheets - all of which are fundamental to the application's structure and security model. This vulnerability can be leveraged to bypass access controls, modify critical application objects, or gain unauthorized access to sensitive data stored within the Zope environment.
Mitigation strategies for CVE-2001-0569 require immediate attention through patching the affected Zope versions to the latest stable releases that contain fixes for the return value handling in the affected classes. Organizations should also implement comprehensive access control measures and monitor system logs for any suspicious activity related to object manipulation. The vulnerability aligns with ATT&CK technique T1078 for Valid Accounts and T1566 for Phishing, as attackers may use this flaw to establish persistent access or escalate privileges within the application. Additionally, implementing proper input validation and return value sanitization practices throughout the application codebase can help prevent similar issues from occurring in other components. Security teams should conduct thorough vulnerability assessments of their Zope applications to identify any other potential instances of improper return value handling that might present similar security risks.