ET EXPLOIT Cisco IOS XE Web Server Possible Authentication Bypass Attempt (CVE-2023-20198) (Inbound)

alert http $EXTERNAL_NET any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Cisco IOS XE Web Server Possible Authentication Bypass Attempt (CVE-2023-20198) (Inbound)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri.raw;
    content:"|25|25";
    http.request_body;
    content:"|3c|SOAP|3a|Body|3e|"; nocase;
    content:"|3c|request correlator|3d 22|"; nocase; distance:0; fast_pattern;
    threshold:type limit,seconds 300,count 1,track by_src;
    reference:url,blog.talosintelligence.com/active-exploitation-of-cisco-ios-xe-software/;
    reference:cve,2023-20198;
    classtype:attempted-admin;
    sid:2048941; rev:3;
    metadata:created_at 2023_10_30, cve CVE_2023_20198, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_10_31, reviewed_at 2024_01_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)