CVE-2014-1589 in Firefox
Summary
by MITRE
Mozilla Firefox before 34.0 and SeaMonkey before 2.31 provide stylesheets with an incorrect primary namespace, which allows remote attackers to bypass intended access restrictions via an XBL binding.
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Analysis
by VulDB Data Team • 02/27/2022
The vulnerability identified as CVE-2014-1589 affects Mozilla Firefox versions prior to 34.0 and SeaMonkey versions prior to 2.31, representing a significant security flaw in the browser's handling of XML stylesheets and XBL (XML Binding Language) bindings. This issue stems from an incorrect primary namespace specification within stylesheet processing, creating a bypass mechanism that allows remote attackers to circumvent intended access controls. The flaw specifically impacts how the browser interprets and applies namespace declarations when processing XML documents that contain XBL bindings, which are used to define user interface components and their behavior in Firefox's rendering engine.
The technical exploitation of this vulnerability occurs through the manipulation of namespace declarations within XML stylesheets, where the incorrect primary namespace allows attackers to inject malicious XBL bindings that can access restricted resources or execute unauthorized operations. This namespace misconfiguration creates a path for attackers to bypass the browser's security model by leveraging the way XBL bindings interact with the document object model and CSS styling rules. The flaw essentially allows remote code execution or data access through carefully crafted XML content that exploits the namespace resolution mechanism, enabling attackers to gain privileges beyond what should be permitted by the browser's security policies.
The operational impact of CVE-2014-1589 extends beyond simple privilege escalation, as it represents a fundamental flaw in Firefox's namespace handling that could enable attackers to access sensitive resources, manipulate user interfaces, or execute arbitrary code within the browser context. This vulnerability aligns with CWE-692, which describes insufficient protection against namespace manipulation in XML processing, and can be categorized under ATT&CK technique T1059.007 for execution through XML-based attacks. The vulnerability is particularly dangerous in phishing attacks or when users visit compromised websites, as it allows attackers to bypass security restrictions that should prevent access to local resources or restricted DOM elements through XBL binding manipulation.
Mitigation strategies for this vulnerability require immediate updates to affected browser versions, with users and administrators prioritizing the installation of Firefox 34.0 or later and SeaMonkey 2.31 or later releases that contain the necessary namespace handling fixes. The patch addresses the core issue by correcting how primary namespace declarations are processed in stylesheet handling, ensuring that XBL bindings cannot be manipulated to bypass access controls. Organizations should also implement network-level protections such as content filtering and web application firewalls to detect and block malicious XML content that might attempt to exploit this vulnerability. Security monitoring should focus on identifying unusual XML processing patterns and namespace declarations that could indicate exploitation attempts, while regular security assessments should verify that all browser installations have been updated to versions that contain the necessary namespace handling fixes. The vulnerability demonstrates the critical importance of proper namespace handling in XML processing and highlights the need for robust security testing of core browser components that handle complex document processing scenarios.