Vulnerability Note VU#869184

Oracle Internet Directory contains multiple vulnerabilities in LDAP handling code

Overview

The Oracle Internet Directory server contains vulnerabilities that may allow denial-of-service attacks, unauthorized privileged access, or both. These vulnerabilities were revealed using the PROTOS LDAPv3 test suite and are documented in CERT Advisory CA-2001-18. If your site uses this product, the CERT/CC encourages you to follow the advice provided below.

I. Description

The Oracle Internet Directory server contains multiple vulnerabilities in the code used to process LDAP requests.

In the encoding section of the test suite, this product failed an indeterminate number of test cases in the group that tests a server's response to invalid encodings of BER OBJECT-IDENTIFIER values.

In the application section of the test suite, this product failed 46 of 77 groups. These results suggest that both buffer overflow and format string vulnerabilities are likely to be present in a variety of application components.

II. Impact

One or more of these vulnerabilities allow a remote attacker to execute arbitrary code with the privileges of the Oracle server. The server typically runs with system privileges. At least one of these vulnerabilities has been successfully exploited in a laboratory environment.

III. Solution

Apply a patch from your vendor

Please consult the Systems Affected section for vendor-specific information on addressing this vulnerability.

Block access to directory services at network perimeter

As a temporary measure, it is possible to limit the scope of these vulnerabilities by blocking access to directory services at the network perimeter. Please note that this workaround does not protect vulnerable products from internal attacks.

ldap 389/tcp # Lightweight Directory Access Protocol
ldap 389/udp # Lightweight Directory Access Protocol
ldaps 636/tcp # ldap protocol over TLS/SSL (was sldap)
ldaps 636/udp # ldap protocol over TLS/SSL (was sldap)

Systems Affected

Vendor	Status	Date Notified	Date Updated
Oracle	Vulnerable	12-Dec-2002

References

http://www.ee.oulu.fi/research/ouspg/protos/testing/c06/ldapv3/
http://www.securityfocus.com/bid/3047
http://www.securityfocus.com/bid/3048
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0974
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0975
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1321
http://www.ciac.org/ciac/bulletins/l-116.shtml
http://xforce.iss.net/static/6902.php
http://xforce.iss.net/static/6903.php

Credit

The CERT Coordination Center thanks the Oulu University Secure Programming Group for reporting these vulnerabilities to us, for their detailed technical analyses, and for their assistance in preparing this document.

This document was written by Jeffrey P. Lanza.

Other Information

Date Public:	2001-07-16
Date First Published:	2001-07-16
Date Last Updated:	2002-12-12
CERT Advisory:	CA-2001-18
CVE-ID(s):	CAN-2001-0974
NVD-ID(s):	CAN-2001-0974
US-CERT Technical Alerts:
Metric:	41.90
Document Revision:	33

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