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Cisco IBM Director agent does not properly handle arbitrary TCP packets to port 14247/tcp

Vulnerability Note VU#721092

Original Release Date: 2004-01-22 | Last Revised: 2004-01-23

Overview

Cisco IBM Director agent does not properly handle arbitrary TCP packets to port 14247/tcp.

Description

Cisco voice products (e.g. CallManager, IP Interactive Voice Response, IP Call Center Express) that run on IBM servers install IBM Director agent to provide administrative management. There is a flaw in the way the IBM Director agent (twgipc.exe) handles arbitrary TCP packets to port 14247/tcp. A remote attacker could cause a denial-of-service condition by sending arbitrary TCP packets to the IBM Director agent on port 14247/tcp. This vulnerability could be exploited by port scanning an affected system.

Impact

A remote attacker could cause the IBM Director Agent to consume 100% of the CPU until the server is rebooted.

Solution

Upgrade

Quoting from Cisco's Advisory:
As the mitigation for the vulnerabilities is a repair script, a software upgrade is not required to address the vulnerabilities. However, if you have a service contract, and wish to upgrade to unaffected code, you may obtain upgraded software through your regular update channels once that software is available. For most customers, this means that upgrades should be obtained through the Software Center on Cisco's Worldwide Web site at http://www.cisco.com.

Apply Cisco Repair Script

Cisco has provided a repair script as a workaround until an upgrade is available. The repair script is available from:

http://www.cisco.com/cgi-bin/tablebuild.pl/cmva-3des

Note: The URL above requires a valid Cisco Connection Online (CCO) user account.
Quoting from Cisco's Advisory:
Cisco's repair script adds 3 levels of improved security to the Director agent:

    1. The Director agent no longer listens on TCP or UDP ports 14247 for remote connections from a Director Server. This change prevents the Denial of Service attacks described in the Impact section.

    2. The repair script secures the Director agent such that even if port 14247 is reenabled, the Director agent still would not accept connections from any Director Server.
Please note that applying this repair script may cause adverse affects on production systems. For information, please refer to the Cisco Advisory.

Vendor Information

721092
Expand all

Cisco Systems Inc.

Updated:  January 22, 2004

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Addendum

Please see the Cisco Advisory.

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


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Credit

This was reported by the Cisco Systems Product Security Incident Response Team ( PSIRT

This document was written by Damon Morda.

Other Information

CVE IDs: None
Severity Metric: 3.87
Date Public: 2004-01-21
Date First Published: 2004-01-22
Date Last Updated: 2004-01-23 20:39 UTC
Document Revision: 24

Sponsored by the Department of Homeland Security Office of Cybersecurity and Communications.