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CVE-2021-1748 is a vulnerability in Apple iOS, iPadOS, tvOS, and watchOS prior to versions 14.4, 14.4, 14.4, and 7.3 respectively, where insufficient input validation when processing URLs could allow an attacker to execute arbitrary JavaScript code. The vulnerability is due to improper sanitization of user-supplied URLs, leading to the possibility of code injection.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository contains a MobileSubstrate tweak for jailbroken iOS devices, designed to mitigate CVE-2021-1748. The exploit works by hooking into the App Store's SUStoreController and SKUIURL classes, specifically intercepting the methods that handle application and account URLs. If a URL with the 'itms' scheme is detected, the hook returns nil, effectively blocking the URL from being processed and preventing exploitation of the vulnerability. The tweak is implemented in Objective-C++ and Logos, with the main logic found in 'itmsBlock.mm' and 'itmsBlock.xm'. The package is structured for deployment on iOS devices via Cydia, with appropriate control and plist files for MobileSubstrate integration. No network endpoints or external IPs are present; the only fingerprintable endpoint is the 'itms' URL scheme itself. The exploit is operational and intended as a mitigation rather than an offensive exploit.
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1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.