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Security Advisories Relating to Symantec Products - Symantec pcAnywhere Format String Denial of Service

SYM09-003

March 17, 2009

Revision History

None

Severity

Medium
Remote Access (adjacent network)No
Local AccessYes
Authentication RequiredNo
Exploit availableNo

Overview

Symantec pcAnywhere is susceptible to a format string vulnerability. An authorized local user may potentially leverage this to crash the pcAnywhere application, leading to a denial of service.

Affected Product(s)

Product Version Build Solution
Symantec pcAnywhere 12.0, 12.1, 12.5 All Upgrade to 12.5 SP1

  Note: Only the versions listed above are supported. Customers running non-supported versions should upgrade to the above mentioned non-vulnerable version.

Details

  Layered Defense informed Symantec of a format string vulnerability in Symantec pcAnywhere. This issue can be exploited by a malicious user to crash the application causing a denial of service. Successful exploitation requires local machine access.

Symantec Response

Symantec engineers verified this issue exists on those supported products identified above. Product updates are available for supported affected products.

Symantec is not aware of any customers impacted by this issue, or of any attempts to exploit it.

Information on downloading and applying the upgrade is available from the following locations:

For Enterprise, Small & Mid-Sized Business (SMB) - Download the update from your normal support location

http://service1.symantec.com/SUPPORT/on-technology.nsf/docid/2009030207022460?Open&seg=ent

or, use the LiveUpdate option, if authorized, to install this update

Home and Home Office -

pcAnywhere users who regularly run LiveUpdate should automatically receive an updated (non-vulnerable) version. To ensure all available updates have been applied, users can run a manual LiveUpdate as follows:
  • Open the Symantec pcAnywhere application
  • Click LiveUpdate
  • Run LiveUpdate until all available product updates are downloaded and installed
  • A system reboot may be required before the update takes affect

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. Run both firewall and anti-malware applications, at a minimum, to provide multiple points of detection and protection to both inbound and outbound threats.
  • 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


References

SecurityFocus, http://www.securityfocus.com, has assigned BID 33845 to this issue.

The Common Vulnerabilities and Exposures (CVE), http://cve.mitre.org/, initiative has assigned CVE Candidate number CVE-2009-0538 to this issue.

Credit

Symantec would like to thank Deral Heiland with Layered Defense for reporting this issue and coordinating with us while Symantec resolved it.
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 responsible disclosure guidelines.
Please contact secure@symantec.com if you feel you have discovered a security issue in a Symantec product. A member of the Symantec Product Security team will contact you regarding your submission to coordinate any required response. 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 location below.
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 Product Security. 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 Product Security, 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.
* Signature names may have been updated to comply with an updated IPS Signature naming convention. See http://www.symantec.com/business/support/index?page=content&id=TECH152794&key=54619&actp=LIST for more information.
Last modified on: March 17, 2009
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