Snort mailing list archives
Re: Snort Alert[1:16482:8]
From: waldo kitty <wkitty42 () windstream net>
Date: Tue, 26 Mar 2013 20:44:19 -0500
On 3/26/2013 11:44, Michael Steele wrote:
Is it possible users could be spoofing their x browser to appear to be IE?
spoofing the UA would not trigger the rule in question... /var/snort/rules/web-client.rules: alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-CLIENT Microsoft Internet Explorer userdata behavior memory corruption attempt"; flow:to_client,established; content:"addBehavior|28|"; nocase; content:"|23|default|23|userData"; distance:0; nocase; content:"setAttribute|28|"; distance:0; nocase; pcre:"/(?P<obj>[A-Z\d_]+)\.addBehavior\x28(?P<q1>\x22|\x27|)[^\x29]*\x23default\x23userData(?P=q1)\x29.*?(?P=obj)\.setAttribute\x28[^,]+,\s*[A-Z]/smi"; metadata:policy balanced-ips drop, policy security-ips drop, service http; reference:cve,2010-0806; reference:url,support.microsoft.com/kb/980182; classtype:attempted-user; sid:16482; rev:6;) granted, the above is version 6 of the rule but i doubt it has changed that much to be UA centric... the CVE and KB probably target the specific browsers in their writings... ------------------------------------------------------------------------------ Own the Future-Intel® Level Up Game Demo Contest 2013 Rise to greatness in Intel's independent game demo contest. Compete for recognition, cash, and the chance to get your game on Steam. $5K grand prize plus 10 genre and skill prizes. Submit your demo by 6/6/13. http://p.sf.net/sfu/intel_levelupd2d _______________________________________________ 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://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
Current thread:
- Snort Alert[1:16482:8] Kee, Scott (Mar 26)
- Re: Snort Alert[1:16482:8] Castle, Shane (Mar 26)
- Re: Snort Alert[1:16482:8] Michael Steele (Mar 26)
- Re: Snort Alert[1:16482:8] James Lay (Mar 26)
- Re: Snort Alert[1:16482:8] Kee, Scott (Mar 26)
- Re: Snort Alert[1:16482:8] waldo kitty (Mar 26)
- Re: Snort Alert[1:16482:8] Alex Kirk (Mar 26)
- Re: Snort Alert[1:16482:8] Michael Steele (Mar 26)
- Re: Snort Alert[1:16482:8] Kee, Scott (Mar 27)
- Re: Snort Alert[1:16482:8] Castle, Shane (Mar 26)