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How the mentioned CVE works:
This vulnerability is a type confusion issue within the V8 JavaScript engine. During the compilation process of x64 optimized code, an integer overflow can occur within the instruction selector. This overflow is not properly handled, leading to an out-of-bounds write in the code generation pipeline. An attacker can exploit this by crafting a specific HTML page that triggers the integer overflow when the vulnerable JavaScript code is JIT-compiled. The subsequent out-of-bounds write allows for corruption of memory adjacent to the compilation buffer, potentially leading to remote code execution within the context of the browser sandbox when a user visits a malicious website.
Platform: Google Chromium
Version: V8 Engine
Vulnerability: Type Confusion
Severity: Critical
date: 2024-05-17
Prediction: 2024-05-30
What Undercode Say:
`git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git`
`fetch v8</h2>
<h2 style="color: blue;">cd v8</h2>
<h2 style="color: blue;">git log –oneline –grep=”4761″</h2>
<h2 style="color: blue;">grep -r “InstructionSelector” src/compiler/ –include=”.cc” | head -10`
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How Exploit:
Crafted HTML/JS payload triggers JIT compilation path. Exploits integer overflow in x64 instruction selection phase to achieve OOB write and sandbox escape.
Protection from this CVE:
Update Chrome/Edge. Apply patch commit 4f6c4c7. Disable JIT JavaScript execution.
Impact:
Remote Code Execution. Full system compromise via drive-by download. Bypasses sandbox protections.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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