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CVE-2022-26485 is a use-after-free vulnerability in Mozilla Firefox's XSLT parameter processing. During XSLT transformations, removing an XSLT parameter while processing could result in a dangling pointer, leading to a use-after-free condition. This flaw allows attackers to exploit memory corruption, potentially leading to arbitrary code execution. The vulnerability affects Firefox versions prior to 97.0.2, Firefox ESR prior to 91.6.1, Firefox for Android prior to 97.3.0, Focus prior to 97.3.0, and Thunderbird prior to 91.6.2. The issue was discovered by researchers from Qihoo 360 ATA and has been observed being exploited in the wild.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a proof-of-concept exploit for CVE-2022-26485, a use-after-free vulnerability in Mozilla Firefox (tested on version 78.0 for Windows). The repository consists of two files: a README.md, which provides a brief description and a download link to the specific Firefox version, and exploit.html, which contains the exploit code. The exploit is implemented in JavaScript within an HTML file and leverages XSLTProcessor and crafted XML/XSLT data to trigger the vulnerability. Through manipulation of ArrayBuffers and object properties, the exploit achieves arbitrary memory read and write capabilities in the browser process. This can be used as a foundation for further exploitation, such as executing arbitrary code or escaping the browser sandbox. The exploit is intended to be opened in the vulnerable Firefox browser. No external network endpoints are contacted by the exploit itself, but the README provides a direct link to the Firefox installer for testing. The code is a proof-of-concept and does not include a weaponized or fully automated payload.
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