Vulnerability Note VU#765256

Network Associates PGP Keyserver contains multiple vulnerabilities in LDAP handling code

Overview

The Network Associates PGP Keyserver 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 Network Associates PGP Keyserver 7.0 contains multiple vulnerabilities in the code that processes LDAP requests.

In the encoding section of the test suite, this product failed 12 of 16 groups.

In the application section of the test suite, this product failed 1 of 77 groups. The failed group focused on out-of-bounds integer values for the messageID parameter. Due to a peculiarity of this test group, this failure may actually represent an encoding failure.

II. Impact

One or more of these vulnerabilities allow a remote attacker to execute arbitrary code with the privileges of the Keyserver. 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 Updated
Network Associates	Vulnerable	16-Jul-2001

References

http://www.ee.oulu.fi/research/ouspg/protos/testing/c06/ldapv3/
http://www.securityfocus.com/bid/3046
http://ciac.llnl.gov/ciac/bulletins/l-116.shtml
http://xforce.iss.net/static/6900.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	07/16/2001
Date First Published	07/16/2001 11:36:23 PM
Date Last Updated	12/12/2002
CERT Advisory	CA-2001-18
CVE Name	CAN-2001-1320
US-CERT Technical Alerts
Metric	37.71
Document Revision	29

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Get Adobe Reader