Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0021 -- [Win] Motorola netOctopus Agent MSR Write Privilege Escalation Vulnerability 8 January 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Motorola netOctopus Agent Publisher: iDEFENSE Operating System: Windows Impact: Increased Privileges Execute Arbitrary Code/Commands Access: Existing Account CVE Names: CVE-2007-5761 Original Bulletin: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=636 - --------------------------BEGIN INCLUDED TEXT-------------------- iDefense Security Advisory 01.07.08 http://labs.idefense.com/intelligence/vulnerabilities/ Jan 07, 2008 I. BACKGROUND Motorola netOctopus is an asset management agent. It is used to deploy software, monitor performance, and configure client machines from a central administrative console. More information can be found on the vendor's site at the following URL. http://www.netopia.com/software/products/netoctopus/ II. DESCRIPTION Local exploitation of a privilege escalation vulnerability in Motorola Inc.'s netOctopus could allow an attacker to execute arbitrary code in kernel context. The netOctopus Agent software is supposed to be installed on all client machines. It includes a driver, nantsys.sys, that is loaded at system boot time. This driver exposes a device interface, \\.\NantSys, that is writable by all users. This driver includes functionality for reading and writing arbitrary CPU Model Specific Registers (MSRs). Changing MSR values allows tuning of various low level CPU operations. By modifying SYSENTER_EIP_MSR, is is possible to execute arbitrary attacker supplied code in kernel context by executing a sysenter instruction. III. ANALYSIS Exploitation of this vulnerability results in the execution of arbitrary code in kernel context. Unsuccessful attempts may result in a system crash. However, due to the nature of the vulnerability exploitation is extremely reliable. IV. DETECTION iDefense has confirmed the existence of this vulnerability in version 5.0.0.115 of the nantsys.sys driver as included with netOctopus version 5.1.2 build 1011. Previous versions may also be affected. V. WORKAROUND Remove write permissions for the Everyone group for the \\.\NantSys device. This can be accomplished by using a tool like WinObj. This will prevent regular users from writing to the device. VI. VENDOR RESPONSE To address this vulnerability, Motorola Inc. has made a script available to remove the affected driver from the system. For more information, consult their advisory at the following URL. http://www.netopia.com/support/software/technotes/netoctopus/Removing_the_nantsys_Driver.pdf http://www.netopia.com/support/software/technotes/netoctopus/removeNantsys.vbs VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-5761 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 09/07/2007 Initial vendor notification 09/07/2007 Initial vendor response 01/07/2008 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. - --------------------------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 iQCVAwUBR4LEVih9+71yA2DNAQKFYAP9GFAixBL6CPFtf1LVdd+BXZKWqcdIzLjx v5EBaQh2ftvWn9jSH8ivUC+xJXHQVHzhSNXsxcgfbeNINa7V3DsIVBaLdESu/QwU G+E8k8X01VbhZyAFnc+cZALyhaciD93Ck7paCHYtTzaX8EokYFd7sI0wtnJa1ZxQ N4yEiWmapSk= =dnM0 -----END PGP SIGNATURE-----