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;
)