I. BACKGROUND

For more information, see the vendor's site found at the following link.

http://www.unisys.com/products/software/application__development/busin
ess__information__server/

II. DESCRIPTION

Remote exploitation of a stack based buffer overflow vulnerability in Unisys's Business Information Server could allow an attacker to execute arbitrary code with the privileges of the affected service.

If attackers send a packet to the Unisys Business Information Server over a TCP port, the attacker can corrupt stack memory and gain arbitrary code execution.

III. ANALYSIS

Exploitation of this vulnerability results in the execution of arbitrary code with the privileges of the affected service, usually an administrative account.

IV. DETECTION

iDefense has confirmed the existence of this vulnerability in Business Information Server version 10. Previous versions may also be affected.

V. WORKAROUND

iDefense is currently unaware of any workarounds for this issue.

VI. VENDOR RESPONSE

Unisys has released a patch which addresses this issue. For more information, consult their advisory at the following URL: ftp://ftp.support.unisys.com/pub/mapper/NT/BIS10.1/Readme.txt

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2009-1628 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.

VIII. DISCLOSURE TIMELINE

06/22/2008 - Initial Contact
04/24/2009 - Second Contact Attempt
04/28/2009 - Initial Vendor Response
05/06/2009 - Clarification requested
05/06/2009 - Unisys Lawyer lodge request.
05/06/2009 - Sent Clarification.
05/06/2009 - Clarification received and new clarification requested.
05/07/2009 - Unisys request response.
05/07/2009 - iDefense response regarding PGP key
05/07/2009 - Unisys confirmation.
06/22/2009 - CVE-2009-1628 Assigned by vendor
06/25/2009 - Coordinated Public Disclosure

IX. CREDIT

This vulnerability was reported to iDefense by FistFuXXer.

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X. LEGAL NOTICES

Copyright © 2009 iDefense, 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.