GPL FTP USER overflow attempt

Query · suricata

flow:to_server,established,no_stream;
content:"USER|20|"; nocase;
isdataat:100,relative;
pcre:"/^USER\x20[^\x00\x20\x0a\x0d]{100}/smi";
Raw source GPL FTP USER overflow attempt · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert ftp $EXTERNAL_NET any -> $HOME_NET any (
    msg:"GPL FTP USER overflow attempt";
    flow:to_server,established,no_stream;
    content:"USER|20|"; nocase;
    isdataat:100,relative;
    pcre:"/^USER\x20[^\x00\x20\x0a\x0d]{100}/smi";
    reference:bugtraq,10078;
    reference:bugtraq,1227;
    reference:bugtraq,1504;
    reference:bugtraq,1690;
    reference:bugtraq,4638;
    reference:bugtraq,7307;
    reference:bugtraq,8376;
    reference:cve,1999-1510;
    reference:cve,1999-1514;
    reference:cve,1999-1519;
    reference:cve,1999-1539;
    reference:cve,2000-0479;
    reference:cve,2000-0656;
    reference:cve,2000-0761;
    reference:cve,2000-0943;
    reference:cve,2000-1035;
    reference:cve,2000-1194;
    reference:cve,2001-0256;
    reference:cve,2001-0794;
    reference:cve,2001-0826;
    reference:cve,2002-0126;
    reference:cve,2002-1522;
    reference:cve,2003-0271;
    reference:cve,2004-0286;
    classtype:attempted-admin;
    sid:2101734; rev:36;
    metadata:created_at 2010_09_23, cve CVE_1999_1510, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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