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AUSCERT External Security Bulletin Redistribution
ESB-2010.0184
Symantec Event Manipulation Potential Scan Bypass
22 February 2010
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AusCERT Security Bulletin Summary
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Product: Symantec AntiVirus 10.0.x
Symantec AntiVirus 10.1.x
Symantec AntiVirus 10.2.x
Symantec Client Security 3.0.x
Symantec Client Security 3.1.x
Symantec Endpoint Protection 11.x
Publisher: Symantec
Operating System: Windows
Impact/Access: Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2010-0106
Original Bulletin:
http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2010&suid=20100217_00
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Security Advisories Relating to Symantec Products - Symantec Event Manipulation
Potential Scan Bypass
SYM10-002
February 17, 2010
Description
Revision History
Updated to note that this issue requires Local Access and cannot be done
remotely.
Severity
Medium
Remote Access No
Local Access Yes
Authentication Required No
Exploit publicly available No
Overview
On-demand scanning with Symantec Antivirus and Symantec Endpoint Protection can
be bypassed by denying read access to user files.
Affected Product(s)
Product Version Solution(s)
Symantec AntiVirus 10.0.x Upgrade to MR9 and ensure
Tamper Protection is enabled.
10.1.x
Symantec AntiVirus 10.2.x Ensure Tamper Protection is
enabled.
Symantec Client Security 3.0.x Upgrade to MR9 and ensure
Tamper Protection is enabled.
3.1.x
Symantec Endpoint Protection 11.x Ensure Tamper Protection is
enabled.
Details
Symantec was notified of a means to potentially bypass an on-demand scan in
Symantec AntiVirus and Symantec Endpoint Protection.
If Symantec Tamper protection is disabled, it is possible to potentially bypass
scanning by having another entity deny read access to Symantec AntiVirus or
Symantec Enterprise Protection.
Should an attacker succeed in passing sufficient specific events to the
application, on-demand scans could potentially cease to run. The application
will no longer accept the users current token degrading the on-demand scan
capability while the user remains logged on.
Symantec Response
Symantec product engineers have released MR9 for the Symantec Products listed
above that fix the issue. Symantec recommends that all customers apply the
latest available updates to protect against threats of this nature.
Symantec also recommends that the Symantec Tamper Protection be enabled for all
customers who use Symantec AntiVirus and Symantec EndPoint Protection.
Symantec is not aware of any exploitation of or adverse customer impact from
these issues.
Mitigation
If Customers of Symantec AntiVirus 10.1.x and Symantec Endpoint Protection
11.x are unable to upgrade to the latest available updates, Symantec recommends
that Symantec Tamper Protection be enabled to aid in mitigation of possible
threat.
Best Practices
As part of normal best practices, Symantec strongly recommends:
* Restrict access to administration or management systems to privileged
users.
* Restrict remote access, if required, to trusted/authorized systems only.
* Run under the principle of least privilege where possible to limit the
impact of exploit by threats.
* Keep all operating systems and applications updated with the latest
vendor patches.
* Follow a multi-layered approach to security.
o Run both firewall and anti-malware applications, at a minimum, to
provide multiple points of detection and protection to both inbound
and outbound threats.
o Deploy network and host-based intrusion detection systems to
monitor network traffic for signs of anomalous or suspicious
activity. This may aid in detection of attacks or malicious
activity related to exploitation of latent vulnerabilities
Credit
Symantec would like to thank Jeffrey Walton for reporting this issue and
coordinating with Symantec for resolution.
References
BID: Security Focus, http://www.securityfocus.com, has assigned a Bugtraq ID
(BID)38219 to these issues for inclusion in the Security Focus vulnerability
database.
CVE: These issues are candidates for inclusion in the CVE list
(http://cve.mitre.org), which standardizes names for security problems. The CVE
initiative has assigned CVE-2010-0106 to this issue
Symantec takes the security and proper functionality of our products very
seriously. As founding members of the Organization for Internet Safety
(OISafety), Symantec supports and follows the OISafety responsible disclosure
guidelines. Symantec also subscribes to the vulnerability disclosure guidelines
outlined by the National Infrastructure Advisory Council (NIAC).
Please contact secure@symantec.com if you feel you have discovered a security
issue in a Symantec product. A Symantec Product Security team member will
contact you regarding your submission. Symantec strongly recommends using
encrypted email for reporting vulnerability information to secure@symantec.com.
The Symantec Product Security PGP key can be found at the end of this message.
Symantec has developed a Product Vulnerability Response document outlining the
process we follow in addressing suspected vulnerabilities in our products. This
document is available below.
Copyright (c) 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.
Last modified on: February 17, 2010
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