alert udp $EXTERNAL_NET any -> $HOME_NET 161 (
msg:"ET SNMP missing community string attempt 2";
content:"|30|"; depth:1;
byte_test:1,&,0x80,0,relative,big;
byte_jump:1,0,relative;
content:"|02|"; distance:-129; within:1;
byte_test:1,&,0x80,0,relative,big;
byte_jump:1,0,relative;
content:"|04 00|"; distance:-129; within:2;
reference:bugtraq,2112;
reference:cve,1999-0517;
classtype:misc-attack;
sid:2016179; rev:2;
metadata:created_at 2013_01_09, cve CVE_1999_0517, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)