RE: Are Proxy Firewalls a Security Hole?

["David Harley" <david.a.harley () gmail com>]

First, the EICAR file isn't a virus or by any stretch of the imagination
malicious. It simply displays a text string. 

Secondly, while most mainstream AV companies do detect and flag it, mostly
for the benefit of people needing an installation check, they're not
actually required to do so, and it's unusual for other types of security
product to detect it. 

In any case, the specification of the EICAR file is deliberately very
restricted. If you embed it in a larger file, it's no longer the EICAR test
file, and most products that detect the real thing will, by design,
disregard it unless they detect true malicious code within the larger file. 

http://eicar.org/86-0-Intended-use.html
http://www.amtso.org/amtso-download-using-testfiles.html  
http://go.eset.com/us/resources/white-papers/AVAR-EICAR-2010.pdf 

--
David Harley CITP FBCS CISSP 
Small Blue-Green World
ESET Senior Research Fellow

 

> -----Original Message-----
> From: listbounce () securityfocus com 
> [mailto:listbounce () securityfocus com] On Behalf Of Dav Fisher
> Sent: 31 May 2012 23:55
> To: security-basics () securityfocus com
> Subject: Are Proxy Firewalls a Security Hole?
>
> Given that people are sending larger and larger files, proxy firewalls
> seem to be limited since they can't inspect files after a certain
> point and the 'stream', 'flow', 'express' AV options of many of the
> proxy firewall vendors inspect only a portion of the large file. I've
> been able to put the Eicar virus in different locations of a large
> test file and successfully get the file through the firewall.
>
> So, are proxy firewalls a security hole?
>
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In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

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