Versions (5)
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Rev: 1 • Jul 5, 2023, 12:00 PMET EXPLOIT Fortigate VPN - Repeated POST Requests to /remote/error (CVE-2023-27997)
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT Fortigate VPN - Repeated POST Requests to /remote/error (CVE-2023-27997)"; flow:established,to_server; threshold:type limit, track by_src, count 1, seconds 120; http.method; content:"POST"; http.uri; content:"/remote/error"; fast_pattern; startswith; http.content_len; byte_test:0,>,1000000,0,string,dec; reference:cve,2023-27997; reference:url,blog.lexfo.fr/xortigate-cve-2023-27997.html; reference:url,github.com/BishopFox/CVE-2023-27997-check/blob/main/CVE-2023-27997-check.py; reference:url,bishopfox.com/blog/cve-2023-27997-exploitable-and-fortigate-firewalls-vulnerable; classtype:attempted-admin; sid:2046723; rev:1; metadata:affected_product Fortigate, attack_target Networking_Equipment, created_at 2023_07_05, cve CVE_2023_27997, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_07_05; target:dest_ip;)
Jul 5, 2023, 12:00 PM
Jul 5, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 20, 2025, 9:35 PM
rules/emerging-exploit.rules