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[Full-disclosure] iDefense Security Advisory 08.01.08: Ingres Database for Linux libbecompat Stack Based Buffer Overflow Vulnerability

From: iDefense Labs <labs-no-reply_at_nospam>
Date: Sat Aug 02 2008 - 04:29:53 GMT
To: vulnwatch@vulnwatch.org, full-disclosure@lists.grok.org.uk, bugtraq@securityfocus.com


iDefense Security Advisory 08.01.08
http://labs.idefense.com/intelligence/vulnerabilities/ Aug 01, 2008

I. BACKGROUND Ingres Database is a database server used in several Computer Associates' products. For example, CA Directory Service use thes Ingres Database server. More information can be found on the vendor's website at the following URL.

http://ingres.com/downloads/prod-cert-download.php

II. DESCRIPTION Local exploitation of a stack-based buffer overflow vulnerability in the
"libbecompat" library, as included in Ingres Database 2006 Release 2 for
Linux, allows attackers to execute arbitrary code with the privileges of the Ingres user.

The vulnerability exists within the "libbecompat" library that is used by several of the set-uid "ingres" utilities included with Ingres. When copying a user supplied environment variable into a fixed-size stack buffer, the library fails to check the length of the source string. This results in an exploitable stack buffer overflow.

III. ANALYSIS Exploitation of this vulnerability allows an attacker to execute arbitrary code with the privileges of the "ingres" user. By itself, this vulnerability does not have very serious consequences. However, when combined with the library loading vulnerability, it allows an attacker to execute arbitrary code with root privileges.

IV. DETECTION iDefense has confirmed the existence of this vulnerability in Ingres 2006 Enterprise Edition Release 2 for Linux x86 (32-bit). Other versions may also be affected.

V. WORKAROUND iDefense is currently unaware of any workaround for this issue.

VI. VENDOR RESPONSE
"This problem has been identified and resolved by Ingres in the
following releases: Ingres 2006 release 2 (9.1.0), Ingres 2006 release 1 (9.0.4), and Ingres 2.6."

For more information, refer to Ingres' advisory at the following URL.

http://www.ingres.com/support/security-alert-080108.php

VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-3389 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 07/20/2007 Initial vendor response 07/23/2007 Initial vendor notification 08/01/2008 Coordinated public disclosure

IX. CREDIT The discoverer of this vulnerability wishes to remain anonymous.

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X. LEGAL NOTICES Copyright 2008 iDefense, Inc.

Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDefense. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please e-mail customerservice@idefense.com for permission.

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.



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