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26 February, 2008
Symantec Decomposer: Multiple Denial of Service Vulnerabilities

Revision History
2/26/08 Added CVE information
2/27/08 Added archive type information


Remote AccessYes
Local AccessNo
Authentication RequiredNo
Exploit publicly availableNo

Two Denial of Service (DoS) vulnerabilities have been identified impact a older versions of the Symantec Decomposer when parsing RAR archive content for malicious content.

Products Affected
ProductsVersionsBuildsUpdate To
Symantec AntiVirus for Network Attached Storage & earlierAll4.3.18.43
Symantec AntiVirus Scan Engine and earlierAll4.3.18.43
Symantec AntiVirus Scan Engine for Caching & earlierAll4.3.18.43
Symantec AntiVirus Scan Engine for Clearswift & earlierAll4.3.18.43
Symantec AntiVirus Scan Engine for Messaging & earlierAll4.3.18.43
Symantec AntiVirus Scan Engine for MS ISA & earlierAll4.3.18.43
Symantec AntiVirus Scan Engine for MS SharePoint & earlierAll4.3.18.43
Symantec AntiVirus/Filtering for Domino MPE(AIX, Linux, Solaris)AllAll3.2.2
Symantec Mail Security for Microsoft Exchange4.6.5.12 and earlierAll4.6.8.120 earlier All
Symantec Scan Engine and earlier All

Products Not Affected
Norton AntiVirus All All
Norton AntiVirus for Macintosh All All
Norton Personal Firewall All All
Norton System Works All All
Norton360 All All
Norton Internet Security All All
Symantec AntiVirus Corporate Edition All All
Symantec AntiVirus for Handhelds All All
Symantec AntiVirus for HandHelds - Corporate Edition All All
Symantec AntiVirus for Macintosh All All
Symantec Brightmail AntiSpam All All
Symantec Client Security All All
Symantec Client Security for Nokia All All
Symantec Clientless VPN Gateway 4400 Series All All
Symantec Endpoint Protection All All
Symantec Enterprise Firewall All All
Symantec Firewall / VPN Appliance 100/200 All
Symantec Gateway Security All All
Symantec Gateway Security 300/400 Series 2.0 All
Symantec Gateway Security 5000 Series 3.0.1 All
Symantec Gateway Security 5400 Series 2.0.1 All
Symantec Internet Security for Macintosh All All
Symantec Mail Appliance All All
Symantec Mail Security for Domino NT All All
Symantec Mail Security for Microsoft Exchange 6.0.X All
Symantec Mail Security for SMTP All All
Symantec System Works for Macintosh All All
Symantec Web Security All All
Symantec Web Security for Microsoft ISA 2004 All All

Note: Only currently supported Symantec Products are being updated. Customers using unsupported versions are encouraged to upgrade to a supported version.

Two DoS vulnerabilities were identified of Symantecís Decomposer engine related to scanning RAR archive content. The first issue is triggered when it receives malicious content. If sufficiently malformed, this could possibly cause large amounts of memory to be consumed which could result in a Denial of Service. The second issue is a buffer overflow that can cause the decomposer to crash causing a Denial of Service condition and the potential for remote code execution.

Symantec Response
Symantec engineers have verified and corrected these issues in affected versions of supported products.

Updates are available for affected products. Symantec recommends customers apply the latest product update available for their supported product versions to enhance their security posture and protect against potential security threats of this nature.

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

Product updates are available from the Symantec support site: http://www.symantec.com/techsupp/ or via LiveUpdate when available.

Symantec product users who regularly launch and run LiveUpdate should already have received an updated (non-vulnerable) version of (product/component). However, to ensure all available updates have been applied, users can manually launch and run LiveUpdate in Interactive mode as follows:

To perform a manual update using Symantec LiveUpdate, users should:

  • Open any installed Symantec product
  • Click on LiveUpdate in the toolbar
  • Run LiveUpdate until all available Symantec product updates are downloaded and installed

    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 such as this.
    • Keep all operating systems and applications updated with the latest vendor patches.
    • 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.
    • Deploy network 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

    SecurityFocus, http://www.securityfocus.com, has assigned Bugtraq IDs(BID) to this issue for inclusion in the SecurityFocus vulnerability data base. The BIDs assigned are 27911 and 27913 which can be found at http://www.securityfocus.com/bid/27911 and http://www.securityfocus.com/bid/27913

    This issue is a candidate for inclusion in the Common Vulnerabilities and Exposures (CVE) list (http://cve.mitre.org), which standardizes names for security problems. The CVE initiative has assigned CVE-2008-0308 and CVE-2008-0309 for these issues.

    Symantec would like to thank iDefense for reporting these issues and providing full coordination while Symantec resolved them.

    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 principles of responsible disclosure. 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.

    PDF Symantec Vulnerability Response Policy PGP Symantec Product Vulnerability Management PGP Key

    Copyright © 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.

    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.

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    Last modified on: Friday, 29-Feb-08 13:27:24
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