CVE-2022-3075 – Insufficient data validation in the Mojo vulnerability. How can attackers exploit it? (8th Sep 2022)

Preface: What is the Slice() method in JavaScript? In any programming language, arrays play an important role in storing data and managing different types of data. Developers often need to filter out the array, merge multiple arrays, and push or pop elements from an array to fulfill the required tasks.The slice() method is used to get some specific elements of an array from a given starting index to the given ending index.

  • slice() – The Blob interface’s slice() method creates and returns a new Blob object which contains data from a subset of the blob on which it’s called.

Background: Mojo is a collection of runtime libraries providing a platform-agnostic abstraction of common IPC primitives, a message IDL format, and a bindings library with code generation for multiple target languages to facilitate convenient message passing across arbitrary inter- and intra-process boundaries. By far the most commonly used API defined by Mojo, the C++ Bindings API exposes a robust set of features for interacting with message pipes via generated C++ bindings code.

Vulnerability details: Insufficient data validation in Mojo. Google has confirmed an exploit for the bug exists in the wild, making the vulnerability a zero-day security issue. Attacker can exploit the bug by feeding a malicious input.

Official announcement – Stable Channel Update for Desktop (Friday, September 2, 2022) – https://chromereleases.googleblog.com/2022/09/stable-channel-update-for-desktop.html

My observation: Refer to attached diagram. Is it possible to trigger the vulnerability in this situations?

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