CVE-2018-4429 in iOS
Summary
by MITRE
A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation. This issue affected versions prior to iOS 12.1.1, watchOS 5.1.2.
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Analysis
by VulDB Data Team • 04/18/2020
The vulnerability identified as CVE-2018-4429 represents a URL spoofing flaw that existed in Apple's mobile operating systems prior to specific security updates. This issue specifically impacted iOS versions before 12.1.1 and watchOS versions before 5.1.2, creating a significant security risk for users of these affected platforms. The vulnerability stemmed from inadequate validation of URL inputs within the mobile operating system's handling mechanisms, allowing malicious actors to potentially deceive users through deceptive web address presentations.
The technical flaw manifests in the improper validation of Uniform Resource Locator formats within Apple's mobile operating system frameworks. When processing web addresses, the system failed to adequately verify the authenticity and integrity of URL structures, creating opportunities for attackers to craft deceptive links that could appear legitimate to end users. This weakness falls under the broader category of input validation failures that can lead to various security issues including phishing attacks and user deception. The vulnerability is classified as a spoofing issue that directly impacts user trust and security awareness within the mobile environment.
The operational impact of CVE-2018-4429 extends beyond simple user inconvenience to potentially serious security consequences. Mobile users could be deceived into visiting malicious websites through carefully crafted URLs that appear to originate from trusted sources. This spoofing capability could enable attackers to conduct phishing campaigns, steal sensitive information, or redirect users to compromised web services. The vulnerability particularly affects mobile users who rely on their devices for banking, email, and other sensitive transactions, as the deception could lead to unauthorized access to personal and financial data.
The remediation for this vulnerability involved implementing enhanced input validation mechanisms within the affected Apple operating systems. Apple addressed the issue by strengthening the URL parsing and validation processes in iOS 12.1.1 and watchOS 5.1.2 updates. This improvement ensures that URLs are properly validated before being displayed to users, eliminating the conditions that previously allowed spoofing attacks to succeed. Organizations should prioritize updating affected systems to the patched versions to eliminate exposure to this vulnerability. The fix aligns with industry best practices for input validation and follows established security frameworks that emphasize the importance of proper sanitization and validation of user inputs.
This vulnerability demonstrates the critical importance of URL validation in mobile security contexts and aligns with CWE 20, which addresses improper input validation issues. The remediation approach follows ATT&CK framework principles for defensive measures against phishing and social engineering attacks. Security professionals should consider this vulnerability as part of broader mobile security assessments and ensure comprehensive testing of URL handling mechanisms in mobile applications and operating systems. The patching process represents a standard security update procedure that addresses the specific flaw while maintaining system functionality and user experience. Organizations should implement monitoring procedures to ensure all affected devices receive the necessary security updates and verify that the patched versions properly address the spoofing conditions that previously existed.