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AusCERT Update AU-2008.0002 - [Win][UNIX/Linux]
Adobe Reader - Multiple Vulnerabilities
13 February 2008        AusCERT Update Summary
        ----------------------

Product:              Adobe Reader 8.1.1 and prior
Publisher:            iDEFENSE
Operating System:     Windows
                      UNIX variants (UNIX, Linux, OSX)
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-5659 CVE-2007-5663 CVE-2007-5666
                      CVE-2008-0655 CVE-2008-0667 CVE-2008-0726

Ref:                  ESB-2008.0132

Original Bulletin:  
  http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=655
  http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=656
  http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=657

Comment: The following three (3) iDefense Security Advisories provide more
         detail about the Adobe Reader vulnerability addressed by 8.1.2.
         
         There is currently known active exploitation of these
         vulnerabilities.

Revision History:     February 13 2008: Added CVEs
                      February 11 2008: Corrected formatting
                      February 11 2008: Initial Release

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

iDefense Security Advisory 02.08.08
http://labs.idefense.com/intelligence/vulnerabilities/
Feb 08, 2008

I. BACKGROUND

Adobe Reader is a program for viewing Portable Document Format (PDF)
documents. Acrobat is the program used to create such documents. More
information is available at the following URLs.

http://www.adobe.com/products/acrobat/
http://www.adobe.com/products/reader/

II. DESCRIPTION

Remote exploitation of multiple stack-based buffer overflows in
JavaScript methods in Adobe Reader and Acrobat could allow an attacker
to execute arbitrary code as the current user.

These issues exist due to insufficient input validation in several
JavaScript methods. Inadequate checking is performed on the string
length before it is copied into a fixed sized buffer on the stack. If
an attacker supplies a long string, control structures on the stack may
be modified, allowing the execution of arbitrary code.

III. ANALYSIS

Exploitation of these vulnerabilities would allow an attacker to execute
arbitrary code as the current user. In order to exploit these
vulnerabilities, an attacker would have to convince a targeted user to
open a maliciously constructed file. This file could be sent directly
to the targeted user or linked from a website.

IV. DETECTION

iDefense has confirmed these vulnerabilities exist in Adobe Reader 8.1
on Windows XP SP2. It is likely that other Adobe products that handle
PDF files, including previous versions of Adobe Reader, are also
affected.

V. WORKAROUND

Disabling JavaScript in Adobe Reader or Acrobat will limit exposure to
these vulnerabilities. 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.

VI. VENDOR RESPONSE

Adobe released version 8.1.2 of Adobe Reader and Acrobat to address
these vulnerabilities. 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

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2007-5659 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

10/10/2007  Initial vendor notification
10/10/2007  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
02/06/2008  Immunity makes PoC available to partners
02/07/2008  Adobe publishes APSA08-01
02/08/2008  Exploit discovered in the wild
02/08/2008  Public disclosure

IX. CREDIT

These vulnerabilities were discovered by Greg MacManus of VeriSign
iDefense Labs.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events
http://labs.idefense.com/

X. LEGAL NOTICES

Copyright © 2008 iDefense, Inc.

Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically,
please e-mail customerservice@idefense.com for permission.

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.


iDefense Security Advisory 02.08.08
http://labs.idefense.com/intelligence/vulnerabilities/
Feb 08, 2008

I. BACKGROUND

Adobe Reader is a program for viewing Portable Document Format (PDF)
documents. Acrobat is the program used to create such documents. More
information is available at the following URLs.

http://www.adobe.com/products/acrobat/
http://www.adobe.com/products/reader/

II. DESCRIPTION

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.

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.

III. 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.

IV. DETECTION

iDefense has confirmed this vulnerability exists in Adobe Reader 8.1 on
Windows XP SP2. It is likely that other Adobe products that handle PDF
files, including previous versions of Adobe Reader, are also affected.

V. 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.

VI. 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

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2007-5663 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. 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

IX. CREDIT

This vulnerability was discovered by Greg MacManus of VeriSign iDefense
Labs.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events
http://labs.idefense.com/

X. LEGAL NOTICES

Copyright © 2008 iDefense, Inc.

Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically,
please e-mail customerservice@idefense.com for permission.

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.


iDefense Security Advisory 02.08.08
http://labs.idefense.com/intelligence/vulnerabilities/
Feb 08, 2008

I. BACKGROUND

Adobe Reader is a program for viewing Portable Document Format (PDF)
documents. More information is available at the following URLs.

http://www.adobe.com/products/reader/

II. DESCRIPTION

Remote exploitation of an unsafe library path vulnerability in Adobe
Systems Inc.'s Adobe Reader may allow attackers to execute arbitrary
code as the current user.

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 Provider
library, the file will be loaded into the application, potentially
allowing code execution.

III. 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.

IV. DETECTION

iDefense has confirmed this vulnerability exists in Adobe Reader 8.1
installed on Windows XP and Windows Vista. Previous versions, as well
as those for other platforms, may also be affected.

V. 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.

VI. 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

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2007-5666 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. 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

IX. CREDIT

This vulnerability was discovered by Greg MacManus of VeriSign iDefense
Labs.

Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events
http://labs.idefense.com/

X. LEGAL NOTICES

Copyright © 2008 iDefense, Inc.

Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically,
please e-mail customerservice@idefense.com for permission.

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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