full-disclosure - Re: Forticlient VPN client credential interception vulnerability

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Message-ID: <CAJN6cdc6hqSzzSD-M_vfDkCGcyyq=vFnwyR2D8L20jT1sYmYgA@mail.gmail.com>
Date: Thu, 2 May 2013 17:54:40 +1000
From: Patrick Webster <patrick@...hack.com>
To: Thierry Zoller <thierry@...ler.lu>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Forticlient VPN client credential
	interception vulnerability

Reminded me of a bug I found in an EAL4 certified military encryption product.

The source code actually says "FIXME - need to add parameter validation."

So instead of spending a few minutes adding input sanitisation, the
developers just added a reminder that none exists and shipped the
product as-is. One of those face slap moments.

-Patrick


On Wed, May 1, 2013 at 8:36 PM, Thierry Zoller <thierry@...ler.lu> wrote:
>
>
> You got to be kidding me...
>
>
>> FORTICLIENT VPN CLIENT CREDENTIAL INTERCEPTION VULNERABILITY
>
>
>> When the FortiClient VPN client is tricked into connecting to a proxy
>> server rather than to the original firewall (e.g. through ARP or DNS
>> spoofing,) it detects the wrong SSL certificate but it only warns the
>> user _AFTER_ it has already sent the password to the proxy.
>>
>
>
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