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The CVE-2024-0519 vulnerability is a type confusion issue within the V8 JavaScript engine. The flaw originates during the compilation of optimized code, where the TurboFan compiler fails to properly validate the type of an object before performing operations on it. An attacker can craft a malicious HTML page containing JavaScript designed to trigger a just-in-time (JIT) compilation pass. This specially crafted code tricks the compiler into inferring an incorrect type for a variable. Consequently, the compiler generates optimized machine code that performs unsafe operations, such as writing data to or reading data from an incorrect memory location. This type confusion bypasses security boundaries and can lead to arbitrary code execution within the context of the browser’s renderer process.
Platform: Google Chromium
Version: prior to 121.0.6167.85
Vulnerability: Type Confusion
Severity: High
date: 2024-01-16
Prediction: 2024-01-24
What Undercode Say:
`grep -r “TurboFan” src/compiler/`
`./d8 –allow-natives-syntax exploit.js`
`%OptimizeFunctionOnNextCall(vulnerableFunction);`
How Exploit:
Crafted JavaScript triggers JIT optimization.
Exploit confuses object type representations.
Leads to memory corruption and RCE.
Protection from this CVE
Update to Chromium 121.0.6167.85.
Enable automatic browser updates.
Disable JavaScript execution.
Impact:
Arbitrary Code Execution.
Browser Sandbox Escape.
Compromise of user system.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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