full-disclosure - Re: Barracuda backdoor

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Date: Thu, 28 Apr 2011 18:18:37 +0000
From: "Hartley, Christopher J." <hartley.87@....edu>
To: "<Valdis.Kletnieks@...edu>  <Valdis.Kletnieks@...edu>"
	<Valdis.Kletnieks@...edu>
Cc: Tõnu Samuel <tonu@....ee>,
	"<full-disclosure@...ts.grok.org.uk>" <full-disclosure@...ts.grok.org.uk>
Subject: Re: Barracuda backdoor

fwiw, I've run into a Barracuda instance that had an ssh connection (reverse
shell) open to an address in XO address space.  The user (owner of the Barracuda)
indicated that it was expected, as it was how they were getting support through 
the company.  Not sure I'd permit that without a real demonstration of value and
assurances of limits on that access.

As to what changes they can make when or why, I have no idea.  No matter what
the case, it's always hard for me to trust a vendor when it comes down to production
services. 


On Apr 28, 2011, at 12:09 PM, <Valdis.Kletnieks@...edu>
 <Valdis.Kletnieks@...edu> wrote:

> On Thu, 28 Apr 2011 13:09:14 +0300, =?ISO-8859-1?Q?T=F5nu_Samuel?= said:
> 
>> One day their Barracuda product stopped working.
> 
> OK... That's hardly surprising, given the high-quality software engineering
> that Barracuda is known for.. ;)
> 
>> Barracuda not only disabled all kind of subscription services but also
>> used some kind of backdoor in their products to disable product customer
>> had paid long time ago.
> 
> And I should believe this claim, why?
> 
>> Message was shown "Error: Activation has not been completed. Please
>> activate your Barracuda Spam & Virus Firewall to enable functionality.
>> (Click here to activate)". Customer was blocked to make any changes in
>> admin interface of product. Even more irritating was fact that admin
>> wanted to see why some e-mails were lost and was denied even to see logs!
> 
> Strong claims require strong evidence.  It's well-known that Barracuda turns
> off subscription services if you don't pay - and even charges you back coverage
> for years you skipped.  See the thread starting here:
> 
> http://mailman.nanog.org/pipermail/nanog/2011-April/035067.html
> 
> Now the question is - given that *that* Barracuda was at least semi-functional
> even when off support, do we have any indication that your unit was in fact
> intentionally disabled?  It could very well be the symptoms you are seeing are
> the unit being just plain *broken*.
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