ET WEB_CLIENT Possible Confluence SSTI Exploitation Attempt - Leads to RCE/LFI (CVE-2019-3396)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/rest/tinymce/1/macro/preview"; fast_pattern; endswith;
http.request_body;
content:"|22|contentId|22|"; depth:20;
content:"|22|_template|22 3a|"; distance:0;
Raw source ET WEB_CLIENT Possible Confluence SSTI Exploitation Attempt - Leads to RCE/LFI (CVE-2019-3396) · 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 any any -> $HTTP_SERVERS any (
    msg:"ET WEB_CLIENT Possible Confluence SSTI Exploitation Attempt - Leads to RCE/LFI (CVE-2019-3396)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/rest/tinymce/1/macro/preview"; fast_pattern; endswith;
    http.request_body;
    content:"|22|contentId|22|"; depth:20;
    content:"|22|_template|22 3a|"; distance:0;
    reference:url,packetstormsecurity.com/files/152568/Atlassian-Confluence-Widget-Connector-Macro-Velocity-Template-Injection.html;
    classtype:attempted-admin;
    sid:2027333; rev:4;
    metadata:created_at 2019_05_08, cve CVE_2019_3396, deployment Perimeter, deployment Internal, performance_impact Low, confidence Medium, signature_severity Major, tag CISA_KEV, updated_at 2020_09_17;
)

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