CVE-2026-44069 Netatalk整数下溢漏洞

/* * PoC for CVE-2026-44069: Integer Underflow in Netatalk volxlate * This code simulates the trigger condition. * Compile: gcc -o poc_volxlate poc_volxlate.c */ #include <stdio.h> #include <stdlib.h> #include <string.h> // Mocking the vulnerable function structure based on typical volxlate behavior void vulnerable_volxlate(char *input, int size) { // Vulnerable logic: assuming size is subtracted without checking for 0 // causing an integer underflow if size is 0 or manipulated unsigned int index; if (size > 0) { // In a real scenario, specific crafted bytes trigger the path index = size - 1; } else { // Simulate underflow condition if logic allows size=0 to pass checks index = (unsigned int)(size - 1); } printf("[+] Calculated index: %u\n", index); if (index > 1024) { printf("[!] Potential memory access violation or underflow detected.\n"); } } int main(int argc, char **argv) { printf("[*] CVE-2026-44069 PoC Trigger\n"); // Crafted input to simulate the volume translation issue // In the real vulnerability, this would be specific AFP protocol data char *crafted_input = "AAAA"; int malicious_size = 0; // Triggering potential underflow context printf("[*] Sending crafted input to volxlate function...\n"); vulnerable_volxlate(crafted_input, malicious_size); return 0; }