ET WEB_SPECIFIC_APPS Possible Apache Unomi OGNL Eval RCE Inbound M2 (CVE-2020-13942)

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET WEB_SPECIFIC_APPS Possible Apache Unomi OGNL Eval RCE Inbound M2 (CVE-2020-13942)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"condition|22 3a|";
    content:"getClass|28|"; distance:0; nocase;
    content:".runtime"; distance:0; nocase;
    content:"getDeclaredMethods|28|"; distance:0; fast_pattern;
    content:".invoke|28|"; distance:0;
    reference:url,www.checkmarx.com/blog/apache-unomi-cve-2020-13942-rce-vulnerabilities-discovered/;
    reference:cve,2020-13942;
    classtype:attempted-admin;
    sid:2031220; rev:1;
    metadata:affected_product Apache_HTTP_server, attack_target Server, created_at 2020_11_19, cve CVE_2020_13942, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_19;
)