ET WEB_SPECIFIC_APPS Citrix/Netscaler ADC and NetScaler Gateway RCE Attempt CVE-2023-3519

Query · suricata

flow:established,to_server;
http.uri;
content:"/gwtest/formss"; fast_pattern;
content:"event=st";
pcre:"/^(?:op|art)(?:&|$)/Ri";
content:"target=";
isdataat:100;
content:!"&"; within:100;
target:dest_ip;
Raw source ET WEB_SPECIFIC_APPS Citrix/Netscaler ADC and NetScaler Gateway RCE Attempt CVE-2023-3519 · 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 -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Citrix/Netscaler ADC and NetScaler Gateway RCE Attempt CVE-2023-3519";
    flow:established,to_server;
    http.uri;
    content:"/gwtest/formss"; fast_pattern;
    content:"event=st";
    pcre:"/^(?:op|art)(?:&|$)/Ri";
    content:"target=";
    isdataat:100;
    content:!"&"; within:100;
    reference:url,blog.assetnote.io/2023/07/24/citrix-rce-part-2-cve-2023-3519/;
    reference:cve,2023-3519;
    classtype:attempted-admin;
    sid:2046885; rev:1;
    metadata:affected_product Citrix, affected_product Netscaler, created_at 2023_07_24, cve CVE_2023_3519, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Major, tag CISA_KEV, updated_at 2023_07_24;
    target:dest_ip;
)

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