ET WEB_SPECIFIC_APPS Vite RSC React2Shell Unsafe Flight Protocol Property Access (CVE-2025-55182)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Vite RSC React2Shell Unsafe Flight Protocol Property Access (CVE-2025-55182)";
    flow:established,to_server;
    http.header;
    content:"x-rsc-action|3a 20|"; fast_pattern; nocase;
    http.content_type;
    content:"multipart/form-data|3b|";
    http.request_body;
    content:"|24 40|";
    pcre:"/^[0-9a-fA-F]+\x22?\x0d\x0a/R";
    content:"|22|_prefix|22|";
    content:"|22|_formData|22|";
    content:"|22 24|";
    pcre:"/^[0-9a-fA-F]+\x3a(?:__proto__|constructor|Module)\x3a/R";
    http.method;
    content:"POST";
    reference:url,github.com/acheong08/CVE-2025-55182-vite-rsc;
    reference:url,react2shell.com/;
    reference:cve,2025-55182;
    classtype:web-application-attack;
    sid:2066028; rev:3;
    metadata:affected_product Vite, attack_target Server, tls_state TLSDecrypt, created_at 2025_12_04, cve CVE_2025_55182, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_12_08, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)