ET WEB_SPECIFIC_APPS Liferay Unauthenticated RCE via JSONWS Inbound (CVE-2020-7961)

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET WEB_SPECIFIC_APPS Liferay Unauthenticated RCE via JSONWS Inbound (CVE-2020-7961)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/api/jsonws/";
    http.request_body;
    content:".c3p0.WrapperConnectionPoolDataSource"; fast_pattern;
    content:"&defaultData.userOverridesAsString=HexAsciiSerializedMap|3a|"; distance:0;
    reference:url,www.synacktiv.com/en/publications/how-to-exploit-liferay-cve-2020-7961-quick-journey-to-poc.html;
    reference:cve,2020-7961;
    classtype:attempted-admin;
    sid:2031592; rev:1;
    metadata:attack_target Server, created_at 2021_01_29, cve CVE_2020_7961, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_01_29;
)