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             AUSCERT External Security Bulletin Redistribution

                          ESB-2007.0608 -- [Win]
              Symantec ActiveX Control Input Validation Error
                              10 August 2007

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              Norton AntiVirus
                      Norton Internet Security
                      Norton System Works
Publisher:            Symantec
Operating System:     Windows
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-2955

Original Bulletin:  
  http://www.symantec.com/avcenter/security/Content/2007.08.09.html

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SYM07- 021
August 09, 2007
Symantec ActiveX Control Input Validation Error

Revision History
None

Risk Impact
High

Remote Access           Yes
Local Access            Yes
Authentication Required No
Exploit available       No

Overview
An input validation error in two ActiveX controls used by Norton
AntiVirus, Norton Internet Security, and Norton System Works could
allow an attacker to execute code on the target system.

Affected Products

Product Version Solution
Norton AntiVirus 2006 Run LiveUpdate in Interactive Mode
Norton Internet Security 2006 Run LiveUpdate in Interactive Mode
Norton Internet Security, Anti Spyware Edition 2005 Run LiveUpdate in
Interactive Mode
Norton System Works 2006 Run LiveUpdate in Interactive Mode

Unaffected Products

Product                                  Version
Norton 360                                All
Norton AntiBot                            All
Norton AntiVirus                     2007 and later
Norton Confidential                       All
Norton Internet Security             2007 and later
Norton System Works                  2007 and later
Symantec AntiVirus Corporate Edition      All
Symantec AntiVirus for Linux              All
Symantec Client Security                  All

Details
Symantec was notified that two ActiveX controls supplied by
NAVCOMUI.DLL contain an input validation error for two properties of
the controls. This error could allow an attacker to crash Internet
Explorer, or possibly run arbitrary code with the rights of the logged
in user.

Symantec response
Symantec engineers have confirmed that the vulnerability in the
products listed in the Affected Products table above. Updates for
affected products are available through LiveUpdate.
No versions of Symantec AntiVirus Corporate Edition or Symantec Client
Security are affected by this vulnerability.
To successfully exploit this vulnerability, an attacker would need to
entice the user to view a specially crafted HTML document. This type
of attack is often achieved by sending email containing a link to the
malicious site, and persuading the recipient to click on the link.
Symantec is not aware of any customers impacted by this issue, or of
any attempts to exploit the issue.

Mitigation
Symantec Security Response has released Bloodhound.Exploit.148 to
detect and block attempts to exploit this vulnerability. This
detection is available in virus definitions dated 08-09-2007 and
later.
In addition, Symantec has released an IPS signature to detect and
block attempts to exploit this vulnerability. The signature, HTTP
Symantec NAV NavComUI ActiveX BO, is available in signatures dated
08-09-2007 and later.
Virus definitions and IPS signatures are both available through
LiveUpdate

How to Obtain the Update
Symantec Norton product users who regularly launch and run LiveUpdate
should already have received an updated (non-vulnerable) version of
NAVCOMUI.DLL.
However, to ensure all available updates have been applied, users can
manually launch and run LiveUpdate in Interactive mode as follows:
  * Open any installed Norton product
  * Click on LiveUpdate in the GUI
  * Run LiveUpdate until all available product updates are downloaded
    and installed

Best Practices
Symantec recommends any affected customers update their product
immediately to protect against potential attempts to exploit this
vulnerability. As part of normal best practices, Symantec recommends
the following:
  * Run under the principle of least privilege to limit the impact of
    exploits.
  * Keep all operating systems and applications updated with the
    latest vendor patches.
  * Follow a multi-layered approach to security. Run both firewall and
    antivirus software to provide multiple points of detection and
    protection from inbound and outbound threats.
  * Keep anti-virus definitions and IPS (firewall) signatures up to
    date.

Credit
Symantec would like to thank Carsten Eiram, Secunia Research for
reporting this issue and coordinating with us on the response.

References
The Common Vulnerabilities and Exposures (CVE) initiative has assigned
CVE Candidate CVE-2007-2955 to this issue.
This issue is a candidate for inclusion in the CVE list
(http://cve.mitre.org), which standardizes names for security
problems. 
SecurityFocus (http://www.securityfocus.com) has assigned Bugtraq
ID (BID) 24983 to 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) 2007 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
secure@symantec.com 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, 09-Aug-07 08:42:00
Last modified on: Thursday, 09-Aug-07 08:51:42

- --------------------------END INCLUDED TEXT--------------------

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