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CVE-2021-30862 is an input-validation vulnerability in iTunes U. Processing a maliciously crafted URL can result in arbitrary JavaScript code execution. The issue was addressed through improved input sanitization in iTunes U 3.8.3.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains multiple proof-of-concept (POC) exploits for CVE-2021-30862, a critical vulnerability in Apple's iTunes U app (prior to version 3.8.3) on iOS. The exploit leverages the app's custom URL scheme (itms-itunesu://) and exposed JavaScript APIs to achieve remote code execution, data exfiltration, and memory corruption (double free). The structure includes several HTML files (POC.html, POC_2.html, etc.) that chain together to trigger the vulnerability, as well as a main.js file demonstrating advanced exploitation techniques such as fake object primitives and memory manipulation. Notable endpoints include a hardcoded exfiltration server and file paths accessed via XHR. The README provides detailed background, disclosure timeline, and references to related research. The exploit is a functional POC, demonstrating the ability to launch Calculator, exfiltrate sensitive data, and crash the app, but does not include a fully weaponized payload.
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