alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT Outbound GPON Authentication Bypass Attempt (CVE-2018-10561)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"?images/"; pcre:"/(?:\/GponForm\/diag_FORM\?images\/|\.html\?images\/)/i"; http.request_body; content:"XWebPageName=diag&diag"; depth:22; fast_pattern; reference:url,www.vpnmentor.com/blog/critical-vulnerability-gpon-router/; classtype:attempted-admin; sid:2027063; rev:3; metadata:created_at 2019_03_06, cve CVE_2018_10561, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_11_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)