===================================================================== CERT-Renater Note d'Information No. 2008/VULN134 _____________________________________________________________________ DATE : 11/04/2008 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Systems running EMC DiskXtender. ====================================================================== iDefense Security Advisory 04.09.08 http://labs.idefense.com/intelligence/vulnerabilities/ Apr 09, 2008 I. BACKGROUND EMC DiskXtender is a data backup and migration suite. It consists of several applications that are used to manage storing large quantities of files across multiple storage devices. One of the components of DiskXtender is the MediaStor, which is used to provide support for a variety of media and device types. For more information see the vendor's website at the following URL. http://software.emc.com/products/product_family/diskxtender_family.htm II. DESCRIPTION Remote exploitation of a format string vulnerability in EMC Corp.'s DiskXtender could allow an attacker to execute arbitrary code with the privileges of the affected service. When handling requests on the RPC interface with UUID b157b800-aef5-11d3-ae49-00600834c15f, the service does not properly validate the content of a string in requests. Since this string is passed directly to a formatting function, a format string vulnerability occurs. III. ANALYSIS Exploitation of this vulnerability results in the execution of arbitrary code with the privileges of the affected service, usually SYSTEM. In order to exploit this vulnerability, authentication is required. IV. DETECTION iDefense confirmed the existence of this vulnerability in DiskXtender version 6.20.060 for Windows. Previous versions may also be affected. V. WORKAROUND iDefense is currently unaware of any effective workaround for this issue. VI. VENDOR RESPONSE "EMC has issued updates to correct this issue. More details can be found in knowledgebase article emc184091 available from powerlink.emc.com. EMC customers can further contact EMC Software Technical Support at 1-877-534-2867." VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-0963 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 02/21/2008 Initial vendor notification 02/22/2008 Initial vendor response 04/09/2008 Coordinated public disclosure IX. CREDIT This vulnerability was reported to iDefense by Stephen Fewer of Harmony Security (www.harmonysecurity.com). 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@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. iDefense Security Advisory 04.09.08 http://labs.idefense.com/intelligence/vulnerabilities/ Apr 09, 2008 I. BACKGROUND EMC DiskXtender is a data backup and migration suite. It consists of several applications that are used to manage storing large quantities of files across multiple storage devices. One of the components of DiskXtender is the File System Manager, which is used to create and manage backups. For more information see the vendor's website at the following URL. http://software.emc.com/products/product_family/diskxtender_family.htm II. DESCRIPTION Remote exploitation of a buffer overflow vulnerability in EMC Corp.'s DiskXtender could allow an attacker to execute arbitrary code with the privileges of the affected service. The File System Manager is prone to a stack-based buffer overflow vulnerability. When handling requests on the RPC interface with UUID b157b800-aef5-11d3-ae49-00600834c15f, the service does not properly validate the length of a string in the request. By making a specially crafted request, a stack based buffer overflow occurs. III. ANALYSIS Exploitation of this vulnerability results in the execution of arbitrary code with the privileges of the affected service, usually SYSTEM. In order to exploit this vulnerability, authentication is required. IV. DETECTION iDefense confirmed the existence of this vulnerability in DiskXtender version 6.20.060 for Windows. Previous versions may also be affected. V. WORKAROUND iDefense is currently unaware of any effective workaround for this issue. VI. VENDOR RESPONSE "EMC has issued updates to correct this issue. More details can be found in knowledgebase article emc184091 available from powerlink.emc.com. EMC customers can further contact EMC Software Technical Support at 1-877-534-2867." VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-0962 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 02/21/2008 Initial vendor notification 02/22/2008 Initial vendor response 04/09/2008 Coordinated public disclosure IX. CREDIT This vulnerability was reported to iDefense by Stephen Fewer of Harmony Security (www.harmonysecurity.com). 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@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. iDefense Security Advisory 04.09.08 http://labs.idefense.com/intelligence/vulnerabilities/ Apr 09, 2008 I. BACKGROUND EMC DiskXtender is a data backup and migration suite. It consists of several applications that are used to manage storing large quantities of files across multiple storage devices. The main components of the product suite are the File System Manager, the MediaStor and the License Server. These components all create RPC endpoints that can be accessed remotely. For more information see the vendor's website at the following URL. http://software.emc.com/products/product_family/diskxtender_family.htm II. DESCRIPTION Remote exploitation of an authentication bypass vulnerability in EMC Corp.'s DiskXtender could allow an attacker to execute arbitrary code. Each of the main components of the DiskXtender suite is vulnerable to an authentication bypass vulnerability. Specifically, the authentication code contains a hard-coded login and password. By connecting to the RPC interface, and logging on with these credentials, it is possible to bypass the normal authentication process. III. ANALYSIS Exploitation of this vulnerability results in an unauthenticated attacker gaining administrative access to the DiskXtender server. This allows an attacker to create and delete files on the backup server, and run other DiskXtender commands. This could potentially lead to the execution of arbitrary code with SYSTEM privileges. IV. DETECTION iDefense confirmed the existence of this vulnerability in DiskXtender version 6.20.060 for Windows. Previous versions may also be affected. V. WORKAROUND iDefense is currently unaware of any effective workaround for this issue. VI. VENDOR RESPONSE "EMC has issued updates to correct this issue. More details can be found in knowledgebase article emc184091 available from powerlink.emc.com. EMC customers can further contact EMC Software Technical Support at 1-877-534-2867." VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-0961 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 02/21/2008 Initial vendor notification 02/22/2008 Initial vendor response 04/09/2008 Coordinated public disclosure IX. CREDIT This vulnerability was reported to iDefense by Stephen Fewer of Harmony Security (www.harmonysecurity.com). 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@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. ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================