CVE-2026-43908 OpenImageIO整数溢出导致越界写入漏洞

#include <iostream> #include <vector> // Simulating the vulnerable logic void vulnerable_function(int width, int height) { // Assume width * height is large enough to cause overflow int total_pixels = width * height; unsigned char* output_buffer = new unsigned char[total_pixels * 3]; for (int i = 0; i < total_pixels; ++i) { // Vulnerable expression: i * 3 overflows if i is large (e.g., > 0x55555555) int offset = i * 3; // This will write out of bounds if offset is negative/wrapped output_buffer[offset] = 0xFF; output_buffer[offset + 1] = 0xFF; output_buffer[offset + 2] = 0xFF; } delete[] output_buffer; } int main() { // Trigger condition: i needs to be > 715827882 to overflow i*3 in signed 32-bit // This is a conceptual PoC demonstrating the overflow condition. // A real exploit would craft a specific image file format. std::cout << "Attempting to trigger integer overflow..." << std::endl; // vulnerable_function(100000, 10000); // Hypothetical large dimensions return 0; }