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RemoteDocs R-Viewer Code Execution and Sensitive Information Disclosure



SYMSA-2007-009: RemoteDocs R-Viewer Code Execution and Sensitive Information Disclosure
SYMSA-2007-009: RemoteDocs R-Viewer Code Execution and Sensitive Information Disclosure



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                     Symantec Vulnerability Research
http://www.symantec.com/research 
                           Security Advisory

   Advisory ID: SYMSA-2007-009
Advisory Title: RemoteDocs R-Viewer Code Execution and Sensitive
                  Information Disclosure
Author: Adam Baldiwn / adam_baldwin@symantec.com 
  Release Date: 17-09-2007
   Application: RemoteDocs R-Viewer 1.6.2836
      Platform: Windows
      Severity: Remotely exploitable / User access
 Vendor status: Update available
    CVE Number: CVE-2007-4750 CVE-2007-4751
Reference: http://www.securityfocus.com/bid/25591 


Overview:

RemoteDocs R-Viewer is a secure document viewer used by remotedocs.com.
There exists a design flaw in RemoteDocs R-Viewer where code can be executed
upon opening the RDZ file without any knowlege or warning to the user.
Additionally, temporary files are not properly removed of disk exposing the
encrypted data.


Details:

The problem is due to a design flaw in the R-Viewer application. It is
possible to replace the normal encrypted RDZ file with a specially
crafted RDZ file. The first file in this archive will be executed with
current user privledges by the R-Viewer application based strictly on file
extension alone.

To further compound this issue it may be possible for an attacker to gain
other sensitive information from the R-Viewer application through easily
predictable temporary directories that don't appear to expire content
regularily. Included inside of these temorary directories are the unecnrypted
copies of the documents the R-Viewer application has opened in the past.

Example:
C:\Program Files\RemoteDocs\Viewer\tmp\31325193(1)   <-- First opening
C:\Program Files\RemoteDocs\Viewer\tmp\31325193(2)   <-- Second opening


Vendor Response:

RemoteDocs Engineers have verified these issues and have resolved them in
the latest product release R-Viewer 1.6.3768. RemoteDocs recommends all
customers immediately obtain the newest version of R-Viewer to protect against
these types of threats. RemoteDocs is unaware of any adverse customer impact
from these issues. There are no known publicly available exploits.


Recommendation:

All users should upgrade to the latest version of R-Viewer 1.6.3768.


Common Vulnerabilities and Exposures (CVE) Information:

The Common Vulnerabilities and Exposures (CVE) project has assigned
the following names to these issues.  These are candidates for
inclusion in the CVE list (http://cve.mitre.org), which standardizes 
names for security problems.


CVE-2007-4750
CVE-2007-4751

- -------Symantec Vulnerability Research Advisory Information-------

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Symantec Vulnerability Research GPG Key:
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- -------------Symantec Product Advisory Information-------------

To Report a Security Vulnerability in a Symantec Product:
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For general information on Symantec's Product Vulnerability
reporting and response:
http://www.symantec.com/security/ 

Symantec Product Advisory Archive:
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Symantec Product Advisory PGP Key:
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- ---------------------------------------------------------------

Copyright (c) 2007 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 Consulting Services. Reprinting the whole or part of
this alert in any medium other than electronically requires
permission from research@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.

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