ET WEB_SPECIFIC_APPS N-able N-central Authentication Bypass (CVE-2025-9316)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS N-able N-central Authentication Bypass (CVE-2025-9316)";
    flow:established,to_server;
    flowbits:set,ET.N_able_N_central.CVE_2025_9316;
    http.uri;
    content:"/dms/services/ServerUI"; fast_pattern; startswith;
    http.header;
    content:"soapaction|3a 20|"; nocase;
    http.request_body;
    content:"sessionHello";
    reference:url,horizon3.ai/attack-research/attack-blogs/n-able-n-central-from-n-days-to-0-days/;
    reference:cve,2025-9316;
    classtype:web-application-attack;
    sid:2065915; rev:1;
    metadata:affected_product N_Able, attack_target Server, tls_state TLSDecrypt, created_at 2025_11_25, cve CVE_2025_9316, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_25, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)