ET SCAN UPnP SUBSCRIBE Inbound - Possible CallStranger Scan (CVE-2020-12695)

Query · suricata

flow:established,to_server;
http.method;
content:"SUBSCRIBE"; nocase;
http.header;
content:"CALLBACK|3a 20|"; fast_pattern;
content:"NT|3a 20|";
Raw source ET SCAN UPnP SUBSCRIBE Inbound - Possible CallStranger Scan (CVE-2020-12695) · 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 -> $HOME_NET any (
    msg:"ET SCAN UPnP SUBSCRIBE Inbound - Possible CallStranger Scan (CVE-2020-12695)";
    flow:established,to_server;
    http.method;
    content:"SUBSCRIBE"; nocase;
    http.header;
    content:"CALLBACK|3a 20|"; fast_pattern;
    content:"NT|3a 20|";
    reference:cve,2020-12695;
    reference:url,kb.cert.org/vuls/id/339275;
    classtype:attempted-recon;
    sid:2030272; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2020_06_09, cve CVE_2020_12695, deployment Perimeter, confidence Medium, signature_severity Informational, updated_at 2020_06_09;
)

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