ET WEB_SERVER Cisco Unified Communications Manager 15.x Unauthenticated Remote Code Execution

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET WEB_SERVER Cisco Unified Communications Manager 15.x Unauthenticated Remote Code Execution";
    flow:established,to_server;
    http.header;
    content:"authorization|3a 20|basic|20|mw1kzgq0v0tpkzoxz2uxqvzxc3h"; fast_pattern; nocase;
    content:"x-forwarded-for|3a|"; nocase;
    pcre:"/^\s*(?:localhost|127\x2e(?:0\x2e){2}1|\x3a{2}1|(?:0\x2e){3}0)/R";
    reference:url,github.com/0xReadingSteiner/Silent-Call;
    classtype:attempted-admin;
    sid:2071420; rev:1;
    metadata:affected_product Cisco_Unified_Communications_Manager, attack_target Server, tls_state TLSDecrypt, created_at 2026_08_07, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_08_07, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)