Date: Thu, 9 Jan 2014 17:00:15 +0000
From: Pedro Ribeiro <pedrib@...il.com>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: [CVE -2014-1201] Lorex security DVD ActiveX
	control buffer overflow

Can't seem to get github links to work, just go to the PoC repo and
navigate from there if you are interested in seeing the files.
On 9 Jan 2014 16:55, "Pedro Ribeiro" <pedrib@...il.com> wrote:

> Hi,
>
> I have discovered a buffer overflow vulnerability that allows remote code
> execution in an ActiveX control bundled by a manufacturer of video
> surveillance systems.
> The company is Lorex Technologies, a major video surveillance manufacturer
> that is very popular in the US and East Asia. Their affected product range
> is the EDGE series, which has 16 products in it. I have confirmed that all
> 16 are vulnerable at this point in time. These security DVR's are remotely
> accessible, and when you access it on a Windows computer with Internet
> Explorer, they try to install the vulnerable ActiveX control INetViewX. The
> Lorex manual[1] instructs the user to blindly accept the ActiveX control
> install when prompted.
> The full list of devices, as well as links to the firware download, can be
> found in [2]. Their products offer remote video viewing capabilities, and
> you can find some of them on Shodan[3].
>
> The buffer overflow can be triggered by a really long string (10000+
> characters) in the HTTP_PORT parameter. The instruction pointer can be very
> easily controlled in XP by the characters 109 to 113 in the string. Please
> refer to the PoC file lorex-testcase.html. You will see that the HTTP_PORT
> parameter is composed of D's, apart from chars 109 to 113 which are four
> A's. If you open this file in IE after installing the control, you will see
> that IE will crash with an EIP of 0x41414141. Changing the four A's to any
> other value will cause EIP to crash on that value.
>
> The list below tells a better story about what is affected and how it can
> be controlled:
> Win XP SP3 with IE6 - Fully exploitable as described
> Win XP SP3 with IE8 - Could not get it to crash (????)
> Win 7 x64 with IE10 fully patched - Fully exploitable, though not as easy
> as for XP (see analyze -v [4] and !exploitable [5] outputs)
>
> To verify this vulnerability you can download and extract the firmware
> using binwalk (http://code.google.com/p/binwalk/). To do so, please
> follow the instructions in [6], and then install the ActiveX control in
> INetViewProj1_02030330.cab.
>
> I have contacted Lorex and they initially said they would fix it, but went
> radio silent shortly afterwards.
> 17.11.2013 - Initial contact via support page
> 18.11.2013 - Email to sales, no response.
> 21.11.2013 - Second email to sales, received response by sales saying they
> will forward it to technical support and get back to me.
> 04.12.2013 - Third email to sales saying that technical support never
> contacted me back. No response.
> 08.01.2013 - MITRE assigns CVE-2014-1201 to this issue.
> 09.01.2013 - Public disclosure.
>
> All references can be found at:
> https://github.com/pedrib/PoC/lorexActivex/lorex-report.txt
>
> Proof of concept:
> https://github.com/pedrib/PoC/lorexActivex/lorex-testcase.html
>
> Regards,
> Pedro Ribeiro (pedrib@...il.com)
> Agile Information Security
>

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