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Security Advisories Relating to Symantec Products - Symantec Workspace Streaming Potential Unauthorized Downloads


June 16, 2010

Revision History




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


Symantec’s Workspace Streaming client fails to properly authenticate with the Symantec Workspace Streaming server when downloading files. This could potentially lead to unauthorized download of arbitrary code to a client system.

Products Affected

Product Version Build Platform Solution
Symantec AppStream 5.2.x All All Upgrade to SWS 6.1 and apply all available updates
Symantec Workspace Streaming 6.1.x All All 6.1 SP4


CERT identified a weakness in the Symantec Workspace Streaming application (formerly Symantec AppStream). The Symantec Workspace Streaming client does not properly authenticate with the server prior to downloading available files hosted on the server.

A malicious user could potentially establish a rogue Workspace Streaming server masquerading as an authorized server. If the server is properly configured and recognized by the client, this lack of proper authentication could possibly allow download of arbitrary files to a client system with no interaction required from the system user. This could result in successful arbitrary file download and possible execution on the client system.

Symantec Response

Symantec product engineers have developed and released a solution through Symantec's support download location as indicated. Symantec recommends all customers apply the latest available updates to protect against threats of this nature.

Symantec knows of no exploitation of or adverse customer impact from this issue.

Symantec Workspace Streaming 6.1 SP4 is currently available for update through the FileConnect -Electronic Software Distribution web site.

Best Practices

As part of normal best practices, Symantec strongly recommends a multi-layered approach to security
  • Restrict access to administration or management systems to privileged users.
  • Restrict remote access, if it is required, to trusted/authorized systems only.
  • Run under the principle of least privilege where possible to limit the impact of potential exploits.
  • Follow a multi-layered approach to security. Run both firewall and antivirus applications, at a minimum, to provide multiple points of detection and protection to both inbound and outbound threats.
  • Keep all operating systems and applications updated with the latest vendor patches.
  • 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.


Symantec thanks Will Dormann with CERT for reporting this finding and coordinating closely with Symantec as we resolved the issue.


Security Focus, http://www.securityfocus.com, has assigned a Bugtraq ID (BID) 40611 to this issue for inclusion in the Security Focus vulnerability database.

This issue is a candidate for inclusion in the Common Vulnerabilities and Exposures (CVE) list (http://cve.mitre.org). The CVE initiative has assigned CVE-2008-4389 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 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


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: June 16, 2010
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