Vulnerability Note VU#657547

Critical Path directory products contain multiple vulnerabilities in LDAP handling code

Overview

Multiple Critical Path directory products contain 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 InJoin Directory Server and LiveContent Directory both contain multiple vulnerabilities in the code that processes LDAP requests. These vulnerabilities were discovered independently by Critical Path using the PROTOS LDAPv3 test suite.

The tests conducted by Critical Path demonstrated failures in both the encoding and application sections of the test suite.

II. Impact

These vulnerabilities allow a remote attacker to crash affected Critical Path directory servers, resulting in a denial-of-service condition. They may also allow a remote attacker to execute arbitrary code with the privileges of the directory server. The server typically runs with system privileges.

III. Solution

Apply a patch from your vendor

Please consult the vendor 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
Critical Path	Vulnerable	13-Aug-2001

References

http://www.ee.oulu.fi/research/ouspg/protos/testing/c06/ldapv3/
http://www.securityfocus.com/bid/3124
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1314
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1315
http://ciac.llnl.gov/ciac/bulletins/l-116.shtml

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:	2001-08-02
Date First Published:	2001-08-13
Date Last Updated:	2002-12-12
CERT Advisory:	CA-2001-18
CVE-ID(s):	CAN-2001-1314
NVD-ID(s):	CAN-2001-1314
US-CERT Technical Alerts:
Metric:	3.54
Document Revision:	19

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