search menu icon-carat-right cmu-wordmark

CERT Coordination Center

Oracle Internet Directory contains multiple vulnerabilities in LDAP handling code

Vulnerability Note VU#869184

Original Release Date: 2001-07-17 | Last Revised: 2002-12-12


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.


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.


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.


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)

Vendor Information


Oracle Affected

Notified:  April 06, 2001 Updated: December 12, 2002



Vendor Statement

Oracle has prepared a Solaris-based patch set for Oracle Internet Directory versions 2.1.1.x and 3.0.1. These patches were made available on July 17, 2001 to Oracle Internet Directory customers via the Oracle MetaLink ( system.

Please visit Oracle Technology Network at for details on workarounds and patch availability information for the potential buffer overflow vulnerabilities discovered in Oracle Internet Directory.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


For further information regarding the Oracle response to this vulnerability, please see

CVSS Metrics

Group Score Vector



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

CVE IDs: CVE-2001-0974
CERT Advisory: CA-2001-18
Severity Metric: 41.90
Date Public: 2001-07-16
Date First Published: 2001-07-17
Date Last Updated: 2002-12-12 23:24 UTC
Document Revision: 33

Sponsored by CISA.