ET EXPLOIT Discourse SNS Webhook RCE Inbound (CVE-2021-41163)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/webhooks/aws"; nocase; fast_pattern;
http.request_body;
content:"|22|SubscribeURL|22 20 3a 20 22 7c|"; nocase;
content:"|22|Signature|22 3a|"; nocase;
Raw source ET EXPLOIT Discourse SNS Webhook RCE Inbound (CVE-2021-41163) · 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 -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Discourse SNS Webhook RCE Inbound (CVE-2021-41163)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/webhooks/aws"; nocase; fast_pattern;
    http.request_body;
    content:"|22|SubscribeURL|22 20 3a 20 22 7c|"; nocase;
    content:"|22|Signature|22 3a|"; nocase;
    reference:url,0day.click/recipe/discourse-sns-rce/;
    reference:cve,2021-41163;
    classtype:attempted-admin;
    sid:2034252; rev:1;
    metadata:attack_target Server, created_at 2021_10_25, cve CVE_2021_41163, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, updated_at 2021_10_25, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)

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