Rule History

SID: 2002998 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 7 • Jul 30, 2010, 12:00 PM

Message:

ET DELETED HELO Non-Displayable Characters MailEnable Denial of Service

Rule:

alert tcp $EXTERNAL_NET any -> $HOME_NET 25 (msg:"ET DELETED HELO Non-Displayable Characters MailEnable Denial of Service"; flow:established,to_server; content:"HELO "; nocase; depth:60; pcre:"/^[^\n]*[\x00-\x08\x0e-\x1f]/R"; reference:cve,2006-3277; reference:bugtraq,18630; classtype:attempted-dos; sid:2002998; rev:7; metadata:created_at 2010_07_30, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)

Created:

Jul 30, 2010, 12:00 PM

Updated:

Jul 26, 2019, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Nov 10, 2025, 10:34 PM

Filename:

rules/emerging-deleted.rules