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Network Security Podcast, Episode 143

With the CanSecWest conference last week, right on the heels of Black Hat Europe, there have been many happenings in the security world. On top of that, our favorite investigative reporter managed to take down yet another group of bad guys by shining his flashlight in the right direction.   < p>But before we delve into the week’s security news, we spend a little time talking about my shiny new Mac Pro, as Martin gives me a few parenting tips (don’t worry, we try not to bore you too much). I rant a bit on Apple’s stupidity with their cord-length on the new 24” Cinema Display. Seriously, only 3’6”? With no extension available anywhere?!? Sigh. And now, on to the show. Network Security Podcast, Episode 143, March 24, 2009 Show Notes: Brian Krebs reveals the evil that is TrafficConverter. TrafficConverter is shut down. Coincidence? Nope. Is Conficker just a big April’s Fools day joke? Yeah, right. Jeremiah Grossman is seeking quick hits in web application security. Core Security researchers reveal BIOS attack. All browsers go down at CanSecWest. Except Chrome, but no one really targeted it. (Yes, Alan, I just cribbed my own show notes again.) Share:

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Security Speed-bumps

Reading yet another comment on yet another blog about “what good is ABC technology because I can subvert the process” or “we should not use XYZ technology because it does not stop the threats” … I feel a rant coming on. I get seriously annoyed when I hear these blanket statements about how some technologies are no good because they can be subverted. I appreciate zeal in researchers, but am shocked by people’s myopia in applied settings. Seriously, is there any technology that cannot be compromised? I got a chance to chat with an old friend on Friday and he reminded me of a basic security tenet … most security precautions are nothing more than ‘speed bumps’. They are not fool-proof, not absolute in the security that they offer, and do not stand unto themselves without support. What they do is slow attackers down, make it more difficult and expensive in time, money, and processing power to achieve their goals. While I may not be able to brute force and already encrypted file, I can subvert most encryption systems, especially if I can gain access to the host. Can I get by your firewall? Yes. Can I get spam through your email filter? Absolutely. Can I find holes in your WAF policy set? Yep. Write malware that goes undetected, escalate user privileges, confuse your NAC, poison your logs, evade IDS, compromise your browser? Yep. But I cannot do all of these things at the same time. Some will slow me down while others detect what I am doing. With enough time and attention there are very few security products or solutions that would not succumb to attack under the right set of circumstances, but not all of them at one time. We buy anti-spam, even if it is not 100% effective, because it makes the problem set much smaller. We try not to click email links and visit suspect web sites because we know our browsing sessions are completely at risk. When we have solid host security to support encryption systems, we drop the odds of system compromise dramatically. If you have ever heard me speak on security topics, you will have heard a line that I throw into almost every presentation: embrace insecurity! If you go about selecting security technologies thinking that they will protect you from all threats under all circumstances, you have already failed. Know that all your security measures are insecure to some degree. Admit it. Accept it. Understand it. Then account for it. One of the primary points Rich and I were trying to make in our Web Application Security paper was that there are several ways to address most issues. And it’s like fitting pieces of a puzzle together to get reasonable security against your risks in a cost effective manner. What technologies and process changes you select depend upon the threats you need to address, so adapt your plans such that you cover for these weaknesses. Share:

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