Teamware Office contains multiple vulnerabilities in LDAP handling code

Overview

The Teamware Office suite 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.

Description

The Teamware Office suite is packaged with a combination X.500/LDAP server that provides directory services. Multiple versions of the Office product contain vulnerabilities that cause the LDAP server to crash in response to traffic sent by the PROTOS LDAPv3 test suite.

In the encoding section of the test suite, this product failed 9 of 16 groups involving invalid encodings for several BER object types.

In the application section of the test suite, this product failed 4 of 32 groups. The remaining 45 groups were not exercised during the test runs. The four failed groups indicate the presence of buffer overflow vulnerabilities.

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Impact

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

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Solution

Apply a patch from your vendor

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

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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)

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Vendor Information

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Teamware __ Affected

Notified: May 09, 2001 Updated: July 16, 2001

Status

Affected

Vendor Statement

An issue has been discovered with Teamware Office Enterprise Directory (LDAP server) that shows a abnormal termination or loop when the LDAP server encounters a maliciously or incorrectly created LDAP request data.

If the maliciously formatted LDAP request data is requested, the LDAP server may excessively copy the LDAP request data to the stack area.

This overflow is likely to cause execution of malicious code. In other case, the LDAP server may go into abnormal termination or infinite loop.

Vendor Information

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

Addendum

Teamware has provided additional documentation of these issues in their “Teamware Solution Database”, available at:

<http://support.teamw.com/Online/s_database1.shtml&gt;
Registered users can find information on these vulnerabilities by searching for document #010703-0000 for Windows NT or document #010703-0001 for Solaris.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23688960 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.ee.oulu.fi/research/ouspg/protos/testing/c06/ldapv3/&gt;
• <http://www.securityfocus.com/bid/3044&gt;
• <http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1316&gt;
• <http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1317&gt;
• <http://ciac.llnl.gov/ciac/bulletins/l-116.shtml&gt;
• <http://xforce.iss.net/static/6897.php&gt;

Acknowledgements

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-2001-1316
CERT Advisory:	CA-2001-18 Severity Metric: