ET WEB_SERVER Kubernetes Ingress NGINX Controller configuration-snippet Annotation Injection (CVE-2023-5044)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.content_type;
content:"application/json";
http.request_body;
content:"|22|admission.k8s.io/v1|22 2c|";
content:"|22|nginx.ingress.kubernetes.io/configuration-snippet|22 3a|"; fast_pattern;
pcre:"/^\s*?\x22[^\x2c]*?(?:content_by_lua|\x23|\x3b\x7d)/R";
target:dest_ip;
Raw source ET WEB_SERVER Kubernetes Ingress NGINX Controller configuration-snippet Annotation Injection (CVE-2023-5044) · 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_SERVER Kubernetes Ingress NGINX Controller configuration-snippet Annotation Injection (CVE-2023-5044)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.content_type;
    content:"application/json";
    http.request_body;
    content:"|22|admission.k8s.io/v1|22 2c|";
    content:"|22|nginx.ingress.kubernetes.io/configuration-snippet|22 3a|"; fast_pattern;
    pcre:"/^\s*?\x22[^\x2c]*?(?:content_by_lua|\x23|\x3b\x7d)/R";
    reference:url,github.com/r0binak/CVE-2023-5043;
    reference:cve,2023-5044;
    classtype:web-application-attack;
    sid:2061121; rev:1;
    metadata:affected_product Kubernetes, attack_target Server, tls_state TLSDecrypt, created_at 2025_03_27, cve CVE_2023_5044, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2025_03_27, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)

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