RemoteDocs R-Viewer Code Execution and Sensitive Information Disclosure

Advisory Content :

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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 (at) symantec (dot) com [email
concealed]
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 FilesRemoteDocsViewertmp31325193(1) <-- First opening
C:Program FilesRemoteDocsViewertmp31325193(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-------

For questions about this advisory, or to report an error:
research (at) symantec (dot) com [email concealed]

For details on Symantec's Vulnerability Reporting Policy:
http://www.symantec.com/research/Symantec-Responsible-Disclosure.pdf

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

Symantec Vulnerability Research GPG Key:
http://www.symantec.com/research/Symantec_Vulnerability_Research_GPG.asc

- -------------Symantec Product Advisory Information-------------

To Report a Security Vulnerability in a Symantec Product:
secure (at) symantec (dot) com [email concealed]

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

Symantec Product Advisory Archive:
http://www.symantec.com/avcenter/security/SymantecAdvisories.html

Symantec Product Advisory PGP Key:
http://www.symantec.com/security/Symantec-Vulnerability-Management-Key.a
sc

- ---------------------------------------------------------------

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 (at) symantec (dot) com. [email concealed]

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, and Symantec Consulting Services 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.
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RemoteDocs R-Viewer Code Execution and Sensitive Information Disclosure