Firefox for iOS 152.3 Dialog Interruption Vulnerability

Executive Summary

This vulnerability occurs when a malicious webpage interrupts a pending navigation by triggering a synchronous JavaScript dialog. As a result, the browser's address bar displays the destination website's origin, but the content shown is still controlled by the attacker. This mismatch can deceive users into thinking they are visiting a legitimate site when they are actually viewing attacker-controlled content.

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Impact Analysis

The vulnerability can lead to address bar origin spoofing, which may trick users into believing they are on a trusted website. This can facilitate phishing attacks or other malicious activities by making users more likely to enter sensitive information or perform actions under false pretenses.

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Mitigation Strategies

To mitigate this vulnerability, update Firefox for iOS to version 152.3 or later, where the issue has been fixed.

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