Snort mailing list archives

Re: Emerging Threats ruleset error


From: Joel Esler <jesler () sourcefire com>
Date: Wed, 5 Jan 2011 20:06:25 -0500

That's perfectly fine Shawn.  If it's Snort related, the conversation is
always welcome here.

On Wed, Jan 5, 2011 at 6:59 PM, Jefferson, Shawn <
Shawn.Jefferson () bcferries com> wrote:

 Just got alerted (OSSEC!) that there is an error in an emerging threats
rule:

Jan  5 15:45:18 xxxxx02 snort[4414]: FATAL ERROR:
/etc/snort/rules/emerging.rules(8587) What is this "o"(0x6F) doing in your
binary buffer?  Valid hex values only please! (0x0 - 0xF) Position: 14

alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET ACTIVEX
ImageShack Toolbar Remote Code Execution"; flow:established,to_client;
content:"clsid"; nocase; content:"DC922B67-FF61-455E-9D79-959925B6695C";
nocase; distance:0; content:"javascript|3a|document|2e|getElementById|28
27|"; content:"|2e|strategy"; distance:0; within:20;
content:"javascript|3adocument.getElementById|28 27|"; distance:0;
content:"|2e|target"; distance:0; within:20;
pcre:"/<object\s*[^>]*\s*classid\s*=\s*[\x22|\x27]\s*clsid\s*\x3a\s*{?\s*DC922B67-FF61-455E-9D79-959925B6695C\s*}?\s*(.*)\>/si";
classtype:attempted-user; reference:url,www.exploit-db.com/exploits/15601;
sid:2012146; rev:4;)

PS. Apologies for posting on the Snort list, but I'm not a member of any ET
lists, and since it caused Snort to stop running, thought it would might be
useful for others too.

*-- *
*Shawn Jefferson*




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-- 
Joel Esler
Skype:eslerjoel
http://blog.snort.org
------------------------------------------------------------------------------
Learn how Oracle Real Application Clusters (RAC) One Node allows customers
to consolidate database storage, standardize their database environment, and, 
should the need arise, upgrade to a full multi-node Oracle RAC database 
without downtime or disruption
http://p.sf.net/sfu/oracle-sfdevnl
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