ET WEB_SPECIFIC_APPS Cisco ISE StrongSwan API Unauthenticated Remote Code Execution (CVE-2025-20337)

Query · suricata

flow:established,to_server;
http.uri;
content:"/api/v1/strongswan/tunnel"; fast_pattern;
http.request_body;
content:"|22|tunnel_config|22 3a|";
pcre:"/^\s*\x22(?:[A-Za-z0-9\x2b\x2f\x3d]|\x25(?:2[bBfF]|3[dD]))+/R";
http.method;
content:"POST";
target:dest_ip;
Raw source ET WEB_SPECIFIC_APPS Cisco ISE StrongSwan API Unauthenticated Remote Code Execution (CVE-2025-20337) · 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 any (
    msg:"ET WEB_SPECIFIC_APPS Cisco ISE StrongSwan API Unauthenticated Remote Code Execution (CVE-2025-20337)";
    flow:established,to_server;
    http.uri;
    content:"/api/v1/strongswan/tunnel"; fast_pattern;
    http.request_body;
    content:"|22|tunnel_config|22 3a|";
    pcre:"/^\s*\x22(?:[A-Za-z0-9\x2b\x2f\x3d]|\x25(?:2[bBfF]|3[dD]))+/R";
    http.method;
    content:"POST";
    reference:url,github.com/B1ack4sh/Blackash-CVE-2025-20337/blob/main/CVE-2025-20337.yaml;
    reference:cve,2025-20337;
    classtype:web-application-attack;
    sid:2065769; rev:1;
    metadata:affected_product Cisco_ISE, attack_target Server, tls_state TLSDecrypt, created_at 2025_11_14, cve CVE_2025_20337, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_14, 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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