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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2006.0753 -- [Win] Symantec Automated Support Assistant: Vulnerabilities in Support Tool ActiveX Control 12 October 2006 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Symantec Automated Support Assistant Symantec Norton AntiVirus Symantec Norton Internet Security Symantec Norton System Works Publisher: Symantec Operating System: Windows Impact: Execute Arbitrary Code/Commands Access Privileged Data Access: Remote/Unauthenticated Original Bulletin: http://securityresponse.symantec.com/avcenter/security/Content/2006.10.05.html - --------------------------BEGIN INCLUDED TEXT-------------------- SYM06-019 October 5, 2006 Symantec Automated Support Assistant: Vulnerabilities in Support Tool ActiveX Control Revision History None Severity Low (moderated by site restriction and user interaction requirements) Remote Yes, with user interaction Local No Authentication Required site restricted, user interaction required Exploit publicly available No Overview Vulnerabilities were reported in a Symantec-developed ActiveX control, installed with some of Symantecs consumer products and as a part of Symantecs technical support troubleshooting tools. Exploitation of these issues could possibly lead to unauthorized information disclosure or potentially allow arbitrary code execution in the context of the users browser. However, successful exploitation requires specific conditions. Supported Product(s) Product Version Solution(s) Symantec Automated Support Assistant Fix Available Symantec Norton AntiVirus 2005-2006 Fix Available Symantec Norton Internet Security 2005-2006 Fix Available Symantec Norton System Works 2005-2006 Fix Available Note: Only the Symantec Consumer products indicated above shipped with these components. However, the Automated Support Assistant is used by support to detect problems on computer running any supported Symantec consumer product to provide the user with information on solutions to those problems. Therefore, this control may be installed on Symantec customer systems running consumer products and versions, 2006 and prior, other than those listed above. Symantec Corporate and Enterprise products do not install or use these components and are NOT affected by this issue. 2007 Consumer releases are NOT affected by this issue. Details Symantec was alerted to a stack overflow and information disclosure vulnerabilities that Next Generation Security Research (NGSS) discovered in a Symantec-developed ActiveX control, installed as a part of Symantecs Automated Support Assistant and with some of Symantecs consumer products (indicated above). This ActiveX control failed to properly validate external input. This failure could potentially result in a browser crash or, possibly unauthorized use of methods allowing access to system information as well as a stack overflow with the potential for malicious code execution in the context of the users browser. The impact of this threat is considerably lessened as it requires interactive user involvement as well as an attackers successful spoofing of a trusted domain website in any attempt to compromise the targeted system. The ActiveX control identified is restricted to specific trusted websites in which it can be scripted. To exploit successfully, an attacker would need to be able to effectively masquerade as the authorized site and entice a user to click on their specific URL for the malicious code to successfully impact the customers system. Symantec Response Symantec product engineers have developed and released solutions for this issue through Symantec's LiveUpdate and other venues. Symantec users who normally run regular manual LiveUpdates will already be protected. However, to ensure all available patches have been properly applied to Symantec products, users should run a manual LiveUpdate as follows: * Open any installed Symantec consumer product identified above * Click on LiveUpdate in the toolbar * Run LiveUpdate until all available Symantec product updates are downloaded and installed Symantec product engineers have upgraded the current vulnerable component on the Symantec support website so users will be able to download a non-vulnerable version of the Automated Support Assistant. Customers who may have previously downloaded the support tool or users who have installed the consumer products identified above can go to the support site, https://www-secure.symantec.com/techsupp/asa/install.jsp and download a new version of the Automated Support Assistant. By downloading a new version, the legacy tool will be replaced by an updated, non-vulnerable version. Symantec recommends all customers apply all updates to protect against threats of this nature. Symantec knows of no exploitation of or adverse customer impact from these issues. Mitigation Symantec Security Response has also developed a removal tool to assist in removing legacy versions of the at risk control. The removal tool is located here (http://www.symantec.com/home_homeoffice/security_response/removaltools.jsp). IDS signatures have been developed to detect and block any attempts to exploit this issue. Customers using Symantec Norton Internet Security or Norton Personal Firewall will receive signature updates if they run LiveUpdate automatically. If not, Symantec recommends customers manually run Symantec LiveUpdate regularly to ensure they have the most current protection available. Internet zone settings for the local user may prohibit activation of ActiveX controls without their consent. An attacker who successfully exploited this vulnerability could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system would be less impacted than users who operate with administrative user rights in the event of any attempted compromise. As always, if previously unknown malicious code were to be distributed in this manner, Symantec Security Response will quickly react and send updated definitions via LiveUpdate to detect and block any new threat. Best Practices As part of normal best practices, Symantec strongly recommends a multi-layered approach to security: * Run under the principle of least privilege where possible. * Keep all operating systems and applications updated with the latest vendor patches. * Users, at a minimum, should run both a personal firewall and antivirus application with current updates to provide multiple points of detection and protection to both inbound and outbound threats. * Users should be cautious of mysterious attachments and executables delivered via email and be cautious of browsing unknown/untrusted websites or opening unknown/untrusted URL links. * Do not open unidentified attachments or executables from unknown sources or that you didn't request or were unaware of. * Always err on the side of caution. Even if the sender is known, the source address may be spoofed. * If in doubt, contact the sender to confirm they sent it and why before opening the attachment. If still in doubt, delete the attachment without opening it. CVE A CVE Candidate name will be requested from the Common Vulnerabilities and Exposures (CVE) initiative for this issue. This advisory will be revised accordingly upon receipt of the CVE Candidate name. This issue is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. Credit Symantec thanks John Heasman of Next Generation Security Research for reporting this finding to us and for excellent coordination while resolving this issue. ___________________________________________________________ Symantec takes the security and proper functionality of its products very seriously. As founding members of the Organization for Internet Safety (OISafety), Symantec follows the principles of responsible disclosure. Symantec also subscribes to the vulnerability guidelines outlined by the National Infrastructure Advisory Council (NIAC). Please contact secure@symantec.com if you feel you have discovered a potential or actual security issue with a Symantec product. A Symantec Product Security team member will contact you regarding your submission. Symantec has developed a Product Vulnerability Handling Process document outlining the process we follow in addressing suspected vulnerabilities in our products. We support responsible disclosure of all vulnerability information in a timely manner to protect Symantec customers and the security of the Internet as a result of vulnerability. This document is available from the location provided below. Symantec strongly recommends using encrypted email for reporting vulnerability information to secure@symantec.com. The Symantec Product Security PGP key can be obtained from the location provided below. Symantec-Product-Vulnerability-Response Symantec Vulnerability Response Policy Symantec Product Vulnerability Management PGP Key Symantec Product Vulnerability Management PGP Key _________________________________________________________________ Copyright (c) 2006 by Symantec Corp. Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com. 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, Symantec products, Symantec Security Response, and SymSecurity are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners. Initial Post on: Thursday, 05-Oct-06 09:00:00 Last modified on: Thursday, 05-Oct-06 09:23:01 - --------------------------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 iQCVAwUBRS2/eih9+71yA2DNAQJ+fgP+Mply1EdyoumD94c4SLF1SUkNDmQWFOVL 7WINhRcKaRNiMz91i6S3w+i3rEhPE2oRUPYpVsB+oQtUeuY0BqiTWXC2D8H9pED3 fVW4ulX7uLOuYiYWgoOUNeB4P3rvxJIuUKnEqEKgL8dOl55L54t+t1E1CpNdjTtW PQac4l0Sgow= =wO2T -----END PGP SIGNATURE-----