Adobe Reader Security Provider Unsafe Libary Path Vulnerability------------------------------------------------------------------------
SUMMARY
Adobe Reader is "a program for viewing Portable Document Format (PDF) documents".
Remote exploitation of an unsafe library path vulnerability in Adobe Systems Inc.
It's Adobe Reader may allow attackers to execute arbitrary code as the current user.
DETAILS
Vulnerable Systems:
* Adobe Reader version 8.1 installed on Windows XP and Windows Vista
Immune Systems:
* Adobe Reader version 8.1.2
This vulnerability is due to Adobe Reader using a path for "Security
Provider" libraries that contains the directory the application was
started in. Security Provider libraries provide encryption and signature
verification routines to applications. If the current directory contains a
file with the same name as a Security Provide library, the file will be
loaded into the application, potentially allowing code execution.
Analysis:
Exploitation allows an attacker to execute arbitrary code as the user that
started the application. To exploit this vulnerability, the attacker must
convince the targeted user to open a PDF from a directory under their
control. This directory may be local or network based on either an SMB or
WebDAV server. If Adobe Reader has already been started, the library will
not be loaded.
Workaround:
Copying the original library from "%WINDIR%\System32" to the same
directory as the AcroRd32.exe binary will make the application find the
correct library before a malicious one is found.
The actual filenames which can be used to exploit this vulnerability
depend on the operating system and version. To determine which filenames
affect your system, consult the following registry key.
HKLM\System\CurrentControlSet\Control\SecurityProviders\SecurityProviders
This is only a temporary workaround; future software updates will not
update these copies. As such, the copies should be removed once this
vulnerability has been patched.
Vendor response:
Adobe has released version 8.1.2 of Adobe Reader that addresses this
vulnerability. Although there is currently no update for version 7.0.9,
Adobe reports it does plan to release one at a later date. For more
information, visit the vendor's advisory at the following URL:
<
http://www.adobe.com/support/security/advisories/apsa08-01.html>
CVE Information:
<
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5666>
CVE-2007-5666
Disclosure Timeline:
09/25/2007 - Initial vendor notification
09/25/2007 - Initial vendor response
10/26/2007 - Request for status
10/26/2007 - Status - Est. early January
01/04/2008 - Request for status
01/04/2008 - Status - Scheduled early February
01/28/2008 - Adobe plans patch for 8, but not 7
01/30/2008 - Concerns about the plan e-mailed to Adobe
01/31/2008 - Telephone call to clarify concerns
02/06/2008 - Adobe releases 8.1.2
02/07/2008 - Adobe publishes APSA08-01
02/08/2008 - Public disclosure
ADDITIONAL INFORMATION
The information has been provided by iDefense Labs.
The original article can be found at:
<
http://labs.idefense.com/intelli ... /display.php?id=655>
Adobe Reader and Acrobat JavaScript Insecure Method Exposure Vulnerability------------------------------------------------------------------------
SUMMARY
<
http://www.adobe.com/products/acrobat/> Adobe Reader is "a program for
viewing Portable Document Format (PDF) documents. Acrobat is the program
used to create such documents". Remote exploitation of an insecure method
exposed by the JavaScript library in Adobe Reader and Acrobat could allow
an attacker to execute arbitrary code as the current user.
DETAILS
Vulnerable Systems:
* Adobe Reader version 8.1 on Windows XP SP2
Immune Systems:
* Adobe Reader version 8.1.2
Adobe Reader and Acrobat implement a version of JavaScript in the
EScript.api plug-in which is based on the reference implementation used in
Mozilla products. One of the methods exposed allows direct control over
low level features of the object, which in turn allows execution of
arbitrary code.
Analysis:
Exploitation of this vulnerability would allow an attacker to execute
arbitrary code as the current user. In order to exploit this
vulnerability, an attacker would have to convince the targeted user to
open a maliciously constructed file. This file could be sent directly to
the targeted user or linked from a website.
Insufficient error checking is performed on the input which allows, among
other things, attacker-supplied data to be written to arbitrary offsets in
memory, potentially resulting in arbitrary code execution.
Workaround:
Disabling JavaScript in Adobe Reader or Acrobat will limit exposure to
this vulnerability. When JavaScript is disabled, Adobe Reader will prompt
the user that some components of the document may not function, and
provide an opportunity to enable it.
Vendor response:
Adobe released version 8.1.2 of Adobe Reader and Acrobat to address this
vulnerability. Although there is currently no update for version 7.0.9,
Adobe reports it does plan to release one at a later date. For more
information, visit the vendor's advisory at the following URL:
<
http://www.adobe.com/support/security/advisories/apsa08-01.html>
CVE Information:
<
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5663>
CVE-2007-5663
Disclosure timeline:
10/03/2007 - Initial vendor notification
10/03/2007 - Initial vendor response
10/26/2007 - Request for status
10/26/2007 - Status - Est. early January
01/04/2008 - Request for status
01/04/2008 - Status - Scheduled early February
01/28/2008 - Adobe plans patch for 8, but not 7
01/30/2008 - Concerns about the plan e-mailed to Adobe
01/31/2008 - Telephone call to clarify concerns
02/06/2008 - Adobe releases 8.1.2
02/07/2008 - Adobe publishes APSA08-01
02/08/2008 - Public disclosure
ADDITIONAL INFORMATION
The information has been provided by iDefense Labs.
The original article can be found at:
<
http://labs.idefense.com/intelli ... /display.php?id=656>
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