CVE-2002-1204 in Communicator
Summary
by MITRE
Netscape Communicator 4.x allows attackers to use a link to steal a user s preferences, including potentially sensitive information such as URL history, e-mail address, and possibly the e-mail password, by redefining the user_pref() function and accessing the prefs.js file, which is stored in a directory with a predictable name.
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Analysis
by VulDB Data Team • 06/30/2024
The vulnerability described in CVE-2002-1204 represents a critical security flaw in Netscape Communicator version 4.x that exploits the browser's preference handling mechanism. This issue stems from the predictable storage location of the prefs.js configuration file, which contains user preferences and sensitive data. The vulnerability allows remote attackers to craft malicious links that can manipulate the browser's preference system and extract confidential information from users' systems. The flaw specifically targets the user_pref() JavaScript function which is designed to manage user preferences but becomes exploitable when attackers can redefine this function to access the underlying preference storage.
The technical implementation of this vulnerability relies on the predictable directory structure used by Netscape Communicator 4.x for storing user preferences. The prefs.js file is stored in a directory with a known and predictable path, making it accessible to attackers who can construct malicious URLs to trigger the exploitation. When attackers redefine the user_pref() function through crafted JavaScript code, they can gain unauthorized access to the preference file and extract sensitive data including browsing history, email addresses, and potentially email passwords. This represents a classic case of insecure file handling combined with predictable storage locations, creating an attack surface that allows for unauthorized data extraction.
The operational impact of CVE-2002-1204 is significant as it enables attackers to perform reconnaissance and credential harvesting without requiring any special privileges or user interaction beyond clicking a malicious link. Users who visit compromised websites become potential victims, as the attack can be executed entirely through web-based means without requiring local system access or additional exploitation techniques. The vulnerability creates a persistent threat vector that can be used to gather intelligence about user behavior, access patterns, and potentially compromise email accounts. This type of vulnerability aligns with ATT&CK technique T1531 for 'Modify System Image' and CWE-200 for 'Information Exposure' in the Common Weakness Enumeration catalog, highlighting both the information disclosure and system modification aspects of the flaw.
Mitigation strategies for this vulnerability require immediate patching of affected Netscape Communicator 4.x versions and implementation of proper directory access controls for preference files. Organizations should ensure that preference files are stored in non-predictable locations and that access controls are properly configured to prevent unauthorized file access. Browser security configurations should be reviewed to prevent JavaScript functions from accessing sensitive system files, and users should be educated about the dangers of clicking unknown links. The vulnerability demonstrates the importance of proper secure coding practices and highlights the need for robust input validation and access control mechanisms in web browsers. This issue serves as a historical example of how predictable storage locations and insecure preference handling can create significant security risks, emphasizing the importance of following security best practices in software development and configuration management.