ET WEB_SPECIFIC_APPS Cisco RV Series Router import_config.cgi USBconfigfile Command Injection Attempt (CVE-2023-20128)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Cisco RV Series Router import_config.cgi USBconfigfile Command Injection Attempt (CVE-2023-20128)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:26;
    content:"/cgi-bin/import_config.cgi"; fast_pattern;
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|USBconfigfile|22|";
    pcre:"/^.*(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24)|IFS)+/R";
    reference:url,www.iotsec-zone.com/article/383;
    reference:cve,2023-20128;
    classtype:web-application-attack;
    sid:2063623; rev:1;
    metadata:affected_product Cisco_RV_Series, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_07_21, cve CVE_2023_20128, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_07_21, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)