CVE-2004-1753 in Firefox
Summary
by MITRE
The Apple Java plugin, as used in Netscape 7.1 and 7.2, Mozilla 1.7.2, and Firefox 0.9.3 on MacOS X 10.3.5, when tabbed browsing is enabled, does not properly handle SetWindow(NULL) calls, which allows Java applets from one tab to draw to other tabs and facilitates phishing attacks that spoof tabs.
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Analysis
by VulDB Data Team • 06/22/2018
The vulnerability described in CVE-2004-1753 represents a critical security flaw in Apple's Java plugin implementation within web browsers running on MacOS X 10.3.5. This issue specifically affects Netscape 7.1 and 7.2, Mozilla 1.7.2, and Firefox 0.9.3 versions when tabbed browsing functionality is enabled. The flaw stems from improper handling of SetWindow(NULL) API calls within the Java plugin architecture, creating a fundamental breakdown in the isolation mechanisms that should separate different browsing contexts.
The technical root cause of this vulnerability lies in the Java plugin's failure to properly manage window context switching when the SetWindow(NULL) function is invoked. This function call is typically used to disassociate a window handle from a particular context, but in the affected implementations, the plugin does not adequately validate or process these calls. As a result, when a Java applet running in one browser tab makes a SetWindow(NULL) call, the plugin fails to properly isolate that applet's drawing operations from other active tabs. This cross-contamination allows malicious Java applets to render graphics and content in the window contexts of other tabs, effectively breaking the fundamental security boundary between separate browsing sessions.
The operational impact of this vulnerability extends far beyond simple display issues, creating significant opportunities for sophisticated phishing attacks. Attackers can exploit this flaw to craft malicious Java applets that appear to operate within legitimate browser tabs while actually drawing content in other tabs, thereby creating convincing spoofing scenarios. This capability enables attackers to deceive users into believing they are interacting with trusted websites when they are actually viewing fraudulent content in hidden or disguised tabs. The vulnerability directly maps to CWE-254, which addresses security weaknesses related to improper handling of window management functions, and represents a clear violation of the principle of least privilege in multi-tab browsing environments.
From an adversarial perspective, this vulnerability provides attackers with a sophisticated vector for social engineering attacks that bypass traditional browser security models. The ability to draw content across tab boundaries creates a powerful mechanism for crafting deceptive user interfaces that can mimic legitimate browser elements, making it particularly dangerous for financial and identity-sensitive applications. The attack surface is further expanded by the fact that this vulnerability affects multiple browser implementations, increasing the potential impact across different user environments.
The mitigation strategies for this vulnerability require both immediate and long-term approaches to address the underlying architectural flaw. Browser vendors should implement proper validation of SetWindow(NULL) calls within Java plugin contexts to ensure that window context switching maintains proper isolation between tabs. System administrators should consider disabling Java plugin functionality in affected browsers until proper patches are implemented, and users should be advised to avoid visiting untrusted websites while tabbed browsing is enabled. Additionally, this vulnerability highlights the importance of proper sandboxing mechanisms in browser plugin architectures and demonstrates the critical need for comprehensive testing of cross-context operations in multi-threaded environments. The issue also underscores the necessity of implementing proper access controls and memory management within plugin interfaces to prevent unauthorized cross-tab interactions, aligning with ATT&CK technique T1059.007 for execution through Java applets and T1566.002 for phishing attacks leveraging browser vulnerabilities.