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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2007.0281 -- [Win] Symantec Norton Ghost 10 Multiple Vulnerabilities 30 April 2007 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Symantec Norton Ghost 10.0 Publisher: iDEFENSE Operating System: Windows Impact: Execute Arbitrary Code/Commands Access Privileged Data Access: Existing Account Original Bulletin: http://www.symantec.com/avcenter/security/Content/2007.04.26.html - --------------------------BEGIN INCLUDED TEXT-------------------- Symantec Norton Ghost 10 Service Manager Buffer Overflow Vulnerability iDefense Security Advisory 04.26.07 http://labs.idefense.com/intelligence/vulnerabilities/ Apr 26, 2007 I. BACKGROUND Symantec Norton Ghost is a backup and recovery application designed to allow users to completely restore their systems to previous snapshots. More information can be found from the vendors site at the following URL. http://www.symantec.com/home_homeoffice/products/overview.jsp?pcid=br&pvid=ghost10 II. DESCRIPTION Local exploitation of a buffer overflow vulnerability in Norton Ghost could allow local attackers to run code as the SYSTEM level user. Norton Ghost Service Manager is a Local Server COM object that allows privileged Ghost Backup Operators the ability to take and restore Ghost images of the system. A function within the Service Manager can be used to trigger a buffer overflow by supplying an overly long string. III. ANALYSIS Exploitation allows local attackers to execute code as the SYSTEM level user. In order to be able to exploit this vulnerability, attackers must have tasking privileges for the Norton Ghost Service Manager. IV. DETECTION iDefense verified the existence of this vulnerability on Norton Ghost 10.0. Other versions may be vulnerable as well. V. WORKAROUND iDefense recommends limiting which users have permission to interact with the Ghost Service Manager. Ghost provides a means to grant specific users access to these features. VI. VENDOR RESPONSE Symantec has addressed this vulnerability with a software update. The update is available via their LiveUpdate channels. For more information, consult their advisory at the following URL. http://www.symantec.com/avcenter/security/Content/2007.04.26.html VII. CVE INFORMATION A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet. VIII. DISCLOSURE TIMELINE 01/02/2007 Initial vendor notification 01/09/2007 Initial vendor response 04/26/2007 Coordinated public disclosure IX. CREDIT This vulnerability was reported to iDefense by Pravus. 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 © 2007 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. _______________________________________________ Symantec Norton Ghost 10 Recovery Points Insecure Password Storage Vulnerability iDefense Security Advisory 04.26.07 http://labs.idefense.com/intelligence/vulnerabilities/ Apr 26, 2007 I. BACKGROUND Symantec Norton Ghost is a backup and recovery application designed to allow users to completely restore their systems to previous snapshots. More information can be found from the vendors site at the following URL. http://www.symantec.com/home_homeoffice/products/overview.jsp?pcid=br&pvid=ghost10 II. DESCRIPTION Norton Ghost allows administrators and other power users to schedule snapshots of local disks for backup and recovery purposes. If these recovery points are set to save to a remote network share Ghost will prompt the user to enter a user name and password for the share. Password information entered into Ghost for this purpose is encrypted and saved to the local file system in the applications home directory which has read access allowed for all users. The encryption key used by Ghost to decrypt these stored credentials is derived from the MD5 hash of the plain text user name stored in the configuration file. Since every user on the system has read access to these configuration files, any user can decrypt the stored passwords. III. ANALYSIS This vulnerability is the result of insecure encryption utilization plus insecure file permissions. In order for this exploit to have an impact, administrators would either have to configure client machines to save restore points images to a private share, or the vulnerable machine would have to be shared by several users who each saved their restore points images to private shares. IV. DETECTION iDefense verified the existence of this vulnerability on Norton Ghost 10.0. Other versions may be vulnerable as well. V. WORKAROUND If your current backup policy is vulnerable to this exploit scenario one possible work around is to configure client machines to save images to user network shares so that the configuration files only contain the individual users network credentials. VI. VENDOR RESPONSE Symantec has addressed this vulnerability with a software update. The update is available via their LiveUpdate channels. For more information, consult their advisory at the following URL. http://www.symantec.com/avcenter/security/Content/2007.04.26.html VII. CVE INFORMATION A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet. VIII. DISCLOSURE TIMELINE 01/02/2007 Initial vendor notification 03/21/2007 Second vendor notification 03/22/2007 Initial vendor response 04/26/2007 Coordinated public disclosure IX. CREDIT This vulnerability was reported to iDefense by Pravus. 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 © 2007 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. _______________________________________________ - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBRjV5Nyh9+71yA2DNAQKTzgP8DDMTdISjBZqiRV+UgSux/Ag3JSh9tk4g nXCEWPGiBCWuR/zc9Mv17jSTp5Lg/7TBMqhMF9XDRUASXMBxgjJQeb6lrcUsfdbk fiQsU7aLOYd2IH/CgY8LfB9JQHIUujbVKYuXa6Ye2HS9Oi4bdAvqh0jkw4I8UAWO 78U/8N87Mak= =vcl8 -----END PGP SIGNATURE-----