ET WEB_SPECIFIC_APPS Wordpress PingBack Possible GHOST attempt

Query · suricata

flow:established,to_server;
http.uri;
content:"/xmlrpc.php"; nocase;
http.request_body;
content:"pingback.ping"; nocase; fast_pattern;
content:"<string>";
pcre:"/^\s*?https?\x3a\/\//Rs";
isdataat:1024,relative;
content:!"|2f|"; within:1024;
content:!"</string>"; within:1033;
pcre:"/^\d[\d\x2e]{255}/R";
Raw source ET WEB_SPECIFIC_APPS Wordpress PingBack Possible GHOST attempt · Suricata
Esc
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 -> $HTTP_SERVERS any (
    msg:"ET WEB_SPECIFIC_APPS Wordpress PingBack Possible GHOST attempt";
    flow:established,to_server;
    http.uri;
    content:"/xmlrpc.php"; nocase;
    http.request_body;
    content:"pingback.ping"; nocase; fast_pattern;
    content:"<string>";
    pcre:"/^\s*?https?\x3a\/\//Rs";
    isdataat:1024,relative;
    content:!"|2f|"; within:1024;
    content:!"</string>"; within:1033;
    pcre:"/^\d[\d\x2e]{255}/R";
    classtype:web-application-attack;
    sid:2020327; rev:8;
    metadata:affected_product Wordpress, affected_product Wordpress_Plugins, attack_target Web_Server, created_at 2015_01_28, deployment Datacenter, confidence Medium, signature_severity Major, tag Wordpress, updated_at 2020_09_29;
)

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