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ESB-2007.0947 -- [Win][Linux] -- IBM Director fails to properly time-out connection requests from clients

Date: 23 November 2007

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             AUSCERT External Security Bulletin Redistribution

                       ESB-2007.0947 -- [Win][Linux]
 IBM Director fails to properly time-out connection requests from clients
                             23 November 2007

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              IBM Director
Publisher:            US-CERT
Operating System:     Windows
                      Linux variants
Impact:               Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-5612

Original Bulletin:    http://www.kb.cert.org/vuls/id/512193

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US-CERT Vulnerability Note VU#512193
IBM Director fails to properly time-out connection requests from clients

Overview

IBM Director Systems, specifically CIM Server, contains a denial-of-service 
vulnerability that can allow a remote, unauthenticated attacker to render 
Director inoperative.

I. Description

IBM Director is a suite of system management tools.

When a rogue connection request is made to IBM Director Systems, 
specifically the CIM Server, a thread is created that listens on a port, 
waiting for a specific response from the client. If the client does not 
send the expected response, the thread remains in memory listening, 
indicating a high CPU utilization until the client connects to it. If 
multiple rogue clients connect simultaneously, the finite number of 
connections can be exhausted causing server to crash.

Versions 5.20.1 and earlier for Windows and Linux are affected.

II. Impact

IBM Director Systems will become inaccessible for management.

III. Solution

Apply an update

Download and Apply the patch for Windows and Linux systems here:
https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=dmp

Block or restrict access

Employ other protection mechanisms that will restrict access to the 
Director Systems by installing firewalls, defining filters, or by using 
reverse proxies.

Systems Affected

Vendor          Status          Date Updated
IBM eServer     Vulnerable      20-Nov-2007

References

https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=dmp
http://www-03.ibm.com/systems/management/director/

Credit

Thanks to IBM for reporting this vulnerability, who in turn credit 
Juniper Networks.

This document was written by Will Dormann.
Other Information
Date Public             20/11/2007
Date First Published    20/11/2007 16:16:14
Date Last Updated       20/11/2007
CERT Advisory    
CVE Name                CVE-2007-5612
Metric                  0.91
Document Revision       5

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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                On call after hours for member emergencies only.
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