GPL IMAP login buffer overflow attempt

Query · suricata

flow:established,to_server;
content:"LOGIN";
isdataat:100,relative;
pcre:"/\sLOGIN\s[^\n]{100}/smi";
Raw source GPL IMAP login buffer 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 tcp $EXTERNAL_NET any -> $HOME_NET 143 (
    msg:"GPL IMAP login buffer overflow attempt";
    flow:established,to_server;
    content:"LOGIN";
    isdataat:100,relative;
    pcre:"/\sLOGIN\s[^\n]{100}/smi";
    reference:bugtraq,13727;
    reference:bugtraq,502;
    reference:cve,1999-0005;
    reference:cve,1999-1557;
    reference:cve,2005-1255;
    reference:nessus,10123;
    reference:cve,2007-2795;
    reference:nessus,10125;
    classtype:attempted-user;
    sid:2101842; rev:16;
    metadata:created_at 2010_09_23, cve CVE_1999_0005, confidence High, signature_severity Major, updated_at 2019_07_26;
)

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