alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT FortiOS SSL VPN - Information Disclosure (CVE-2018-13379)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/remote/fgt_lang?lang=/../"; depth:35; isdataat:30,relative; fast_pattern; reference:cve,CVE-2018-13379; reference:url,blog.orange.tw/2019/08/attacking-ssl-vpn-part-2-breaking-the-fortigate-ssl-vpn.html; classtype:attempted-admin; sid:2027883; rev:3; metadata:affected_product Fortigate, attack_target Networking_Equipment, created_at 2019_08_14, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, signature_severity Major, tag CISA_KEV, updated_at 2020_08_31, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1082, mitre_technique_name System_Information_Discovery;)