ET WEB_SPECIFIC_APPS Red Hat Keycloak Unauthenticated Server-side Request Forgery in OIDC Dynamic Client Registration

Query · suricata

flow:established,to_server;
http.uri;
content:"/realms/"; startswith;
content:"/clients-registrations/openid-connect"; fast_pattern; distance:0;
http.request_body; strip_whitespace;
content:"|22|redirect_uris|22 3a|";
content:"|22|sector_identifier_uri|22 3a|";
target:dest_ip;
Raw source ET WEB_SPECIFIC_APPS Red Hat Keycloak Unauthenticated Server-side Request Forgery in OIDC Dynamic Client Registration · 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 -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET WEB_SPECIFIC_APPS Red Hat Keycloak Unauthenticated Server-side Request Forgery in OIDC Dynamic Client Registration";
    flow:established,to_server;
    http.uri;
    content:"/realms/"; startswith;
    content:"/clients-registrations/openid-connect"; fast_pattern; distance:0;
    http.request_body; strip_whitespace;
    content:"|22|redirect_uris|22 3a|";
    content:"|22|sector_identifier_uri|22 3a|";
    reference:url,raw.githubusercontent.com/kmkz/Sources/refs/heads/master/keycloak-trusted-hosts-ssrf-poc.sh;
    classtype:web-application-attack;
    sid:2071369; rev:1;
    metadata:attack_target Server, tls_state TLSDecrypt, created_at 2026_08_04, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_08_04, 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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