ET WEB_SERVER Apache APR apr_fnmatch Stack Overflow Denial of Service

Query · suricata

flow:to_server,established;
urilen:>1400;
http.uri;
content:"|2F 3F|P|3D 2A 3F 2A 3F 2A 3F 2A 3F 2A 3F|";
pcre:"/(?:\x2a\x3f){700}/";
Raw source ET WEB_SERVER Apache APR apr_fnmatch Stack Overflow Denial of Service · 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 http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_SERVER Apache APR apr_fnmatch Stack Overflow Denial of Service";
    flow:to_server,established;
    urilen:>1400;
    http.uri;
    content:"|2F 3F|P|3D 2A 3F 2A 3F 2A 3F 2A 3F 2A 3F|";
    pcre:"/(?:\x2a\x3f){700}/";
    reference:cve,2011-0419;
    reference:url,cxib.net/stuff/apr_fnmatch.txt;
    reference:url,bugzilla.redhat.com/show_bug.cgi?id=703390;
    classtype:attempted-dos;
    sid:2012926; rev:4;
    metadata:created_at 2011_06_02, cve CVE_2011_0419, confidence Medium, signature_severity Major, updated_at 2020_04_20;
)

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