Security Incidents: Re: Real-world attacks on sendmail CA-2003-07 seen

[Bennett Todd <bet () rahul net>]

2003-03-10T13:22:05 Barry Kokotailo:
> Is there a snort signature out for this as of yet?
Yes, in the latest signature set includes, at the end of smtp.rules:

alert tcp $EXTERNAL_NET any -> $SMTP_SERVERS 25 (msg:"SMTP From comment overflow attempt"; flow:to_server,established; 
content:"From\:"; content:"<><><><><><><><><><><><><><><><><><><><><><>"; distance:0; content:"("; distance:1; 
content:")"; distance:1; reference:cve,CAN-2002-1337; reference:url,www.kb.cert.org/vuls/id/398025; 
classtype:attempted-admin; sid:2087; rev:2;)

It false-positives pretty easily, but does seem to catch the
currently-discussed attacks.

-Bennett

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