ET WEB_SPECIFIC_APPS ServiceNow Platform Unauthorized Data Inference via Conditional ACLs (CVE-2025-3648)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS ServiceNow Platform Unauthorized Data Inference via Conditional ACLs (CVE-2025-3648)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"|2e|do|3f|";
    content:"sysparm_query|3d|"; fast_pattern;
    pcre:"/^[^\x26]*?(?:\x3d|STARTSWITH|ENDSWITH|CONTAINS|LIKE)\w+/R";
    reference:url,www.varonis.com/blog/counter-strike-servicenow;
    reference:cve,2025-3648;
    classtype:web-application-attack;
    sid:2063379; rev:1;
    metadata:affected_product ServiceNow, attack_target Server, created_at 2025_07_10, cve CVE_2025_3648, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, updated_at 2025_07_10, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)