Snort mailing list archives
Re: SHELLCODE Attacks
From: Erwin Van de Velde <erwin.vandevelde () ua ac be>
Date: Fri, 5 Dec 2003 22:22:49 +0100
*theoretically* I belive the intent is to not catch HTTP replies.. but the shellcode rules are completely broken the way they are written.
Catching HTTP traffic could lead to to much false positives...
Personally, I re-write these rules on a per-case basis for my uses. I have one copy of each rule monitor all accessible ports on all servers. (inbound to tcp/dns, tcp/smtp, tcp/http, etc)
This seems not so good to me... wouldn't it be better to check for shellcode attacks on all ports behind the firewall (except for HTTP perhaps)? This way you cannot forget a port that is open and the traffic on ports that are filtered by the firewall isn't there anymore anyway... Only people behind the firewall, sending 'strange traffic' on ports that are not open could result in extra shellcode attack warnings... but perhaps you should watch people on your network trying to access non-existing services... Not all the bad guys are on the outside, you know.... ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
Current thread:
- SHELLCODE Attacks Naman Latif (Dec 05)
- Re: SHELLCODE Attacks Matt Kettler (Dec 05)
- Re: SHELLCODE Attacks Erwin Van de Velde (Dec 05)
- Re: SHELLCODE Attacks Matt Kettler (Dec 05)
- Re: SHELLCODE Attacks Jeff Nathan (Dec 05)
- Re: SHELLCODE Attacks Matt Kettler (Dec 05)
- Re: SHELLCODE Attacks Erwin Van de Velde (Dec 05)
- Re: SHELLCODE Attacks Matt Kettler (Dec 05)
- <Possible follow-ups>
- RE: SHELLCODE Attacks Naman Latif (Dec 05)
- Windows 2000 Terminal Snort Issues Jim Robinson (Dec 05)