ET EXPLOIT Possible Citrix Application Delivery Controller Arbitrary Code Execution Attempt (CVE-2019-19781) M2

Query · suricata

flow:established,to_server;
http.uri;
content:"/vpns/"; fast_pattern;
http.header;
content:"|0d 0a|NSC_USER|3a 20|"; nocase;
content:"|0d 0a|NSC_NONCE|3a 20|"; nocase;
content:"/../";
Raw source ET EXPLOIT Possible Citrix Application Delivery Controller Arbitrary Code Execution Attempt (CVE-2019-19781) M2 · Suricata
Esc
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 EXPLOIT Possible Citrix Application Delivery Controller Arbitrary Code Execution Attempt (CVE-2019-19781) M2";
    flow:established,to_server;
    http.uri;
    content:"/vpns/"; fast_pattern;
    http.header;
    content:"|0d 0a|NSC_USER|3a 20|"; nocase;
    content:"|0d 0a|NSC_NONCE|3a 20|"; nocase;
    content:"/../";
    reference:url,support.citrix.com/article/CTX267679;
    reference:cve,2019-19781;
    classtype:attempted-admin;
    sid:2029255; rev:3;
    metadata:affected_product Web_Server_Applications, attack_target Server, created_at 2020_01_13, cve CVE_2019_19781, deployment Perimeter, confidence Medium, signature_severity Critical, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_10;
)

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