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Nitro Pro 8 Insecure Library Loading

Nitro Pro 8 Insecure Library Loading
Posted Apr 9, 2013
Authored by M. Heinzl | Site sec-consult.com

Nitro Pro 8 suffers from a DLL hijacking vulnerability.

tags | exploit
systems | windows
advisories | CVE-2013-2773
MD5 | db877ed71edba1b079e90b2476077edd

Nitro Pro 8 Insecure Library Loading

Change Mirror Download
SEC Consult Vulnerability Lab Security Advisory < 20130408-0 >
=======================================================================
title: Nitro Pro 8 - Insecure Library Loading Allows Remote Code
Execution (DLL Hijacking)
product: Nitro Pro
vulnerable version: 8.5.0.26; older versions may also be affected
fixed version: 8.5.2.10
CVE number: CVE-2013-2773
impact: high
homepage: http://www.nitropdf.com/
found: 2013-03-01
by: M. Heinzl
SEC Consult Vulnerability Lab
https://www.sec-consult.com
=======================================================================

Vendor description:
-------------------
>From companies like Boeing® and IBM® to small home businesses with just a few
staff, millions of people worldwide use Nitro Products — like Nitro Pro and
Nitro Reader — to make PDF easy.
Australian-founded in 2005, we're headquartered in downtown San Francisco with
offices in Melbourne, Australia and Nitra Slovakia.

Source: http://www.nitropdf.com/about


Vulnerability overview/description:
-----------------------------------
Nitro Pro is prone to a vulnerability that lets attackers execute arbitrary
code. An attacker can exploit this issue by enticing a legitimate user to use
the vulnerable application to open a file from a remote WebDAV or SMB share
which contains a specially crafted DLL.

Affected DLL: bcgcbproresen.dll (tested on Windows 8)


Proof of concept:
-----------------
Create a DLL with desired code, name it bcgcbproresen.dll and place it within
the same folder as a *.pdf or *.fdf file.


Vulnerable / tested versions:
-----------------------------
Nitro Pro 8.5.0.26; older versions may also be affected


Vendor contact timeline:
------------------------
2013-03-01: Contacting vendor through http://www.nitropdf.com/support/ticket
2013-03-01: Vendor replies
2013-03-01: Forwarded security advisory
2013-03-01: vendor replies
2013-03-01: Provided again contact details
2013-03-08: Contaced vendor again to inquire status
2013-03-13: Vendor replies that they are working on a hotfix
2013-03-14: Confirmed receipt of last email
2013-03-27: Contaced vendor again to inquire status
2013-04-02: Vendor replied that a patch was released on 2013-03-28 which fixes
the vulnerability (version 8.5.2.10)
2013-04-02: Confirmed receipt of last email and coordinated public disclosure
of advisory for 2013-04-08
2013-04-08: SEC Consult releases coordinated security advisory.


Solution:
---------
Update to version 8.5.2.10.


Workaround:
-----------
-


Advisory URL:
-------------
https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SEC Consult Unternehmensberatung GmbH

Office Vienna
Mooslackengasse 17
A-1190 Vienna
Austria

Tel.: +43 / 1 / 890 30 43 - 0
Fax.: +43 / 1 / 890 30 43 - 25
Mail: research at sec-consult dot com
https://www.sec-consult.com
http://blog.sec-consult.com

EOF M. Heinzl / @2013


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