IDS mailing list archives
Re: Obfuscated web pages
From: "Arian J. Evans" <arian.evans () anachronic com>
Date: Thu, 14 Feb 2008 12:49:04 -0800
I haven't seen any IDS/IPS that do this competently. ISS's "Proventia" or whatever their new all-in-wonder IPS box is claims to do this, but then it also lists as a feature that it can prevent "phishing" so my expectations are rather low. We have someone deploying it inline for testing so I should be able to comment more on that device soon, but in general, even WAFs have a hard time at this. Doubt this will make this list as last I checked SF still blocks gmail forwarded email. Arian J. Evans software security stuff On Thu, Feb 14, 2008 at 10:44 AM, Gary Flynn <flynngn () jmu edu> wrote:
Are any current network based IDS/P systems able to unwind obfuscated web script to examine the final javascript product? It would seem they would have to have a javascript engine to do so and issues with reassembly, iterations, and delays would preclude them from doing it inline. Without this capability, it would seem that network based IDS/IPS is destined to digress to AV style malware signatures for malicious web server issues and that the only reliable place to do IDS/P would be on the host. We've been seeing more and more obfuscated web script and according to a recently released IBM report, the majority of exploits are taking this path. http://www.iss.net/x-force_report_images/2008/index.html Thoughts? -- Gary Flynn Security Engineer James Madison University www.jmu.edu/computing/security
-- Arian Evans software security stuff ------------------------------------------------------------------------ Test Your IDS Is your IDS deployed correctly? Find out quickly and easily by testing it with real-world attacks from CORE IMPACT. Go to http://www.coresecurity.com/index.php5?module=Form&action=impact&campaign=intro_sfw to learn more. ------------------------------------------------------------------------
Current thread:
- Obfuscated web pages Gary Flynn (Feb 14)
- Re: Obfuscated web pages Tim (Feb 14)
- Re: Obfuscated web pages Gary Flynn (Feb 14)
- Re: Obfuscated web pages Jon Oberheide (Feb 15)
- Re: Obfuscated web pages Dustin D. Trammell (Feb 15)
- Re: Obfuscated web pages Gary Flynn (Feb 14)
- Re: Obfuscated web pages Kowsik (Feb 14)
- RE: Obfuscated web pages Libershal, David M. (Feb 14)
- Re: Obfuscated web pages Gary Flynn (Feb 14)
- Re: Obfuscated web pages Stefano Zanero (Feb 19)
- Re: Obfuscated web pages Gary Flynn (Feb 14)
- Re: Obfuscated web pages Arian J. Evans (Feb 14)
- Re: Obfuscated web pages Mike Lococo (Feb 14)
- RE: Obfuscated web pages Mike Barkett (Feb 15)
- Re: Obfuscated web pages Ivan Arce (Feb 21)
- RE: Obfuscated web pages Mike Barkett (Feb 25)
- Re: Obfuscated web pages Ivan Arce (Feb 29)
- RE: Obfuscated web pages Mike Barkett (Feb 15)
- Re: Obfuscated web pages Tim (Feb 14)
- Re: Obfuscated web pages Arian J. Evans (Feb 15)
- RE: Obfuscated web pages Mike Barkett (Feb 15)
- Re: Obfuscated web pages Ivan Arce (Feb 21)