Rule History

SID: 2100659 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 10 • Sep 23, 2010, 12:00 PM

Message:

GPL SMTP expn decode

Rule:

alert tcp $EXTERNAL_NET any -> $SMTP_SERVERS 25 (msg:"GPL SMTP expn decode"; flow:to_server,established; content:"expn"; nocase; content:"decode"; nocase; pcre:"/^expn\s+decode/smi"; reference:arachnids,32; reference:cve,1999-0096; reference:nessus,10248; classtype:attempted-recon; sid:2100659; rev:10; metadata:created_at 2010_09_23, cve CVE_1999_0096, signature_severity Unknown, updated_at 2019_07_26;)

Created:

Sep 23, 2010, 12:00 PM

Updated:

Jul 26, 2019, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-smtp.rules