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[Full-disclosure] iDefense Security Advisory 08.01.08: Ingres Database for Linux verifydb Insecure File Permissions Modification Vulnerability

From: iDefense Labs <labs-no-reply_at_nospam>
Date: Sat Aug 02 2008 - 04:28:45 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 uses the 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 file permissions modification vulnerability in the "verifydb" utility, as included with Ingres Database 2006 Release 2 for Linux, allows attackers to modify the permissions of files owned by the Ingres database user.

The vulnerability exists within the "verifydb" utility included with Ingres. It is used to cleanup unneeded files created in the database directory. This program has the set-uid bit set, and is owned by the
"ingres" user.

The "verifydb" program improperly changes the permissions on files. The program first creates a file called "iivdb.log" in the current directory, and then makes it world writable. By creating a symbolic link to a file owned by the "ingres" user, an attacker can gain write access to the target file.

III. ANALYSIS Exploitation of this vulnerability allows an attacker to overwrite arbitrary files owned by 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-2008-3356 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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