alert http any any -> $HOME_NET any (msg:"ET EXPLOIT F5 BIG-IP iControl REST Authentication Bypass Attempt (CVE-2022-1388) M3"; flow:established,to_server; flowbits:set,ET.F5AuthBypass; http.method; content:!"GET"; http.uri; content:"/mgmt/tm"; startswith; http.request_header; header_lowercase; content:"authorization|3a 20|"; startswith; content:"YWRtaW46"; distance:0; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; content:"|0d 0a|x-f5-auth-token|0d 0a|"; fast_pattern; threshold:type limit, count 1, seconds 60, track by_src; reference:cve,2022-1388; classtype:attempted-admin; sid:2049256; rev:3; metadata:affected_product F5, created_at 2023_11_20, cve CVE_2022_1388, deployment Perimeter, deployment Internal, deployment SSLDecrypt, 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;)