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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.1487
         Symantec PGP Desktop & Encryption Desktop Compressed Mail
                          File Denial-of-Service
                             2 September 2014

===========================================================================

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

Product:           Symantec PGP Desktop
                   Symantec Encryption Desktop
Publisher:         Symantec
Operating System:  Windows
                   OS X
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-3436  

Original Bulletin: 
   http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20140821_00

- --------------------------BEGIN INCLUDED TEXT--------------------

Security Advisories Relating to Symantec Products - Symantec Encryption 
Desktop Compressed Mail File Denial-of-Service

SYM14-014

August 21, 2014

Revisions

None

Severity

CVSS2 Base Score 	Impact    Exploitability    CVSS2 Vector

Symantec Encryption Desktop Compressed Mail File Denial-of-Service - Medium

5.0 			2.9 	  9.9 	            AV:N/AC:L/AU:N/C:N/I:N/A:P

Overview

Certain encryption applications permit compression directly in the message 
body of an encrypted email file. Symantec Encryption Desktop will attempt 
decompression and decryption of these specifically formatted incoming email 
files without properly limiting maximum file size during the decompression 
process. Decryption of an excessively large compressed message could cause 
high memory and CPU usage resulting in a denial-of-service (DoS) as the system
becomes unresponsive during the decompression attempt.

Product(s) Affected	

Product 		 Version        Build 	 Solution

Symantec PGP Desktop     10.0.x         All      Symantec Encryption Desktop   
      			 10.1.x			 10.3.2 Maintenance Pack 3
			 10.2.x

Symantec Encryption      10.3.0         All      Symantec Encryption Desktop  
		         10.3.1			 10.3.2 Maintenance Pack
			 10.3.2

Details

Symantec was notified that Symantec Encryption Desktop is susceptible to 
creating a DoS condition on a client system when decrypting a specifically 
formatted/compressed incoming encrypted email message. Symantec Encryption 
Desktop fails to properly limit decompressed file size during the decryption 
process. Certain encryption applications allow compression directly in the 
encrypted mail file which is decrypted and decompressed by Symantec Encrypted
Desktop on receipt by the mail client. A malicious individual can encrypt a 
specifically formatted and encrypted email message and send it to a targeted 
user. Depending on the option setting for the mail client, Symantec Encryption
Desktop will attempt the decryption process upon receipt of the malformed 
email without user intervention. By not properly restricting size limitations
during the decompression portion of the decryption, this could result in 
excessive CPU and memory usage. Successful exploitation of this issue could 
cause a system to become unresponsive and potentially crash.

Symantec Response

Symantec engineers verified this issue and have released an update in Symantec
Encryption Desktop 10.3.2 MP3.

Update information

Customers may obtain Symantec Desktop Encryption maintenance updates through 
their normal Symantec support locations.

Best Practices

As part of normal best practices, Symantec strongly recommends:

Restrict access to administration or management systems to privileged users.

Disable remote access if not required or restrict it to trusted/authorized 
systems only.

Where possible, limit exposure of application and web interfaces to 
trusted/internal networks only.

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

Credit

Symantec would like to thank Alexander Klink, n.runs professionals GmbH, for 
reporting the issue and working with Symantec as it was addressed.

References

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

CVE: This issue is a candidate for inclusion in the CVE list 
(http://cve.mitre.org), which standardizes names for security problems.

CVE 		BID 		Description

CVE-2014-3436   BID 69259 	Symantec Encryption Desktop Compressed Mail 
				File Denial-of-Service

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.

Symantec Vulnerability Response Policy

 Symantec Product Vulnerability Management PGP Key Symantec Product 
Vulnerability Management PGP Key

Copyright (c) 2014 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: August 21, 2014

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