iDefense Security Advisory 01.31.08 http://labs.idefense.com/intelligence/vulnerabilities/ Jan 31, 2008 I. BACKGROUND IBM Corp.'s Informix Dynamic Server is an online transaction processing data server. For more information, visit the product's homepage at the following URL. http://www-306.ibm.com/software/data/informix/ids/ II. DESCRIPTION Local exploitation of a file creation vulnerability in IBM Corp.'s Informix Dynamic Server allows attackers to elevate privileges to root. The set-uid root "onedcu" command requires six parameters to be specified when it is executed. The second parameter is a "Trace" file that this program will open and write to with elevated privileges. III. ANALYSIS Exploitation allows local attackers to gain root privileges. IV. DETECTION iDefense confirmed the existence of this vulnerability in IBM Corp.'s Informix Dynamic Server version 10.00 UC6TL installed on a Linux system. Other versions are also suspected as vulnerable. Versions for other supported Unix systems should also be considered vulnerable. V. WORKAROUND Removing the set-uid bit from the "onedcu" program included with Informix will prevent exploitation. However, this could disable some functionality for non-root users. VI. VENDOR RESPONSE IBM Corp. has addressed this vulnerability with the release of version 10.00.xC8 of Informix Dynamic Server. For more information, visit the following URL. http://www-1.ibm.com/support/docview.wss?uid=swg27011556 VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-0368 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 09/01/2007 Initial vendor notification 09/13/2007 Initial vendor response 01/31/2008 Coordinated public disclosure IX. CREDIT The discoverer of this vulnerability wishes to remain anonymous. Get paid for vulnerability research http://labs.idefense.com/methodology/vulnerability/vcp.php Free tools, research and upcoming events http://labs.idefense.com/ 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@private 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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