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IBM Tivoli PMfOSD HTTP Request Method Buffer Overflow Vulnerability

01.22.08

BACKGROUND

IBM Corp.'s Tivoli Provisioning Manager for OS Deployment is a network boot server that facilitates central management of networked workstations. It implements Preboot Execution Environment (PXE), a Web-based administration service, DHCP, TFTP, and several additional protocols. More information can be found at the following URL.

http://www-306.ibm.com/software/tivoli/products/prov-mgr-os-deploy/

DESCRIPTION

Remote exploitation of a buffer overflow vulnerability in the web server component of IBM Corp.'s Tivoli Provisioning Manager for OS Deployment allows attackers to cause a denial of service condition or potentially execute arbitrary code with SYSTEM privileges.

This vulnerability specifically exists within the logging functionality of the web server component. By making requests with a large HTTP request method, an attacker can cause a static-sized buffer to be overrun with data they supplied.

ANALYSIS

Exploitation allows an attacker to cause a denial of service condition or potentially execute arbitrary code with SYSTEM privileges.

In order to exploit this vulnerability, an attacker must be able to establish a session on TCP port 443 with target machine. No credentials are required to trigger the vulnerable code path.

DETECTION

iDefense has confirmed the existence of this vulnerability in IBM Tivoli Provisioning Manager for OS Deployment version 5.1.0.3. Previous versions may also be affected.

WORKAROUND

iDefense is currently unaware of any workarounds for this issue.

VENDOR RESPONSE

The IBM Tivoli team has addressed this vulnerability within Tivoli Provisioning Manager for OS Deployment Interim Fix 3, Version 5.1.0.3. More information is available from IBM Document swg24018010 at the following URL.

http://www-1.ibm.com/support/docview.wss?uid=swg24018010

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-0401 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.

DISCLOSURE TIMELINE

10/24/2007 Initial vendor notification
10/24/2007 Initial vendor response
01/22/2008 Coordinated public disclosure

CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

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LEGAL NOTICES

Copyright © 2008 Verisign, Inc.

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Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.