Rule History

SID: 2010487 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 2 • Jul 30, 2010, 12:00 PM

Message:

ET DOS Potential Inbound NTP denial-of-service attempt (repeated mode 7 reply)

Rule:

alert udp $EXTERNAL_NET 123 -> $HOME_NET 123 (msg:"ET DOS Potential Inbound NTP denial-of-service attempt (repeated mode 7 reply)"; dsize:4; content:"|97 00 00 00|"; threshold:type limit, count 1, seconds 60, track by_src; reference:url,www.kb.cert.org/vuls/id/568372; reference:cve,2009-3563; classtype:attempted-dos; sid:2010487; rev:2; metadata:created_at 2010_07_30, confidence Medium, signature_severity Major, 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 20, 2025, 10:34 PM

Filename:

rules/emerging-dos.rules