[Solved] How to configure the user_token of Damn Vulnerable Web Application within CSRF field while Script based authentication using ZAP?

by


The modified script within the documentation of Script Based Authentication section for Damn Vulnerable Web Application using ZAP

auth_dvwa_zap_faulty_script

seems incomplete.

The complete script is available at Setting up ZAP to Test Damn Vulnerable Web App (DVWA) which is as follows:

function authenticate(helper, paramsValues, credentials) {
    var loginUrl = paramsValues.get("Login URL");
    var csrfTokenName = paramsValues.get("CSRF Field");
    var csrfTokenValue = extractInputFieldValue(getPageContent(helper, loginUrl), csrfTokenName);
    var postData = paramsValues.get("POST Data");

    postData = postData.replace('{%username%}', encodeURIComponent(credentials.getParam("Username")));
    postData = postData.replace('{%password%}', encodeURIComponent(credentials.getParam("Password")));
    postData = postData.replace('{%' + csrfTokenName + '%}', encodeURIComponent(csrfTokenValue));

    var msg = sendAndReceive(helper, loginUrl, postData);
    return msg;
}

function getRequiredParamsNames() {
    return [ "Login URL", "CSRF Field", "POST Data" ];
}

function getOptionalParamsNames() {
    return [];
}

function getCredentialsParamsNames() {
    return [ "Username", "Password" ];
}

function getPageContent(helper, url) {
    var msg = sendAndReceive(helper, url);
    return msg.getResponseBody().toString();
}

function sendAndReceive(helper, url, postData) {
    var msg = helper.prepareMessage();

    var method = "GET";
    if (postData) {
    method = "POST";
    msg.setRequestBody(postData);
    }

    var requestUri = new org.apache.commons.httpclient.URI(url, true);
    var requestHeader = new org.parosproxy.paros.network.HttpRequestHeader(method, requestUri, "HTTP/1.0");
    msg.setRequestHeader(requestHeader);

    helper.sendAndReceive(msg);

    return msg;
}

function extractInputFieldValue(page, fieldName) {
    // Rhino:
    var src = new net.htmlparser.jericho.Source(page);
    // Nashorn:
    // var Source = Java.type("net.htmlparser.jericho.Source");
    // var src = new Source(page);

    var it = src.getAllElements('input').iterator();

    while (it.hasNext()) {
    var element = it.next();
    if (element.getAttributeValue('name') == fieldName) {
        return element.getAttributeValue('value');
    }
    }
    return '';
}

Using this script, CSRF Field and POST Data field shows up just perfect.

dvwa_loaded

solved How to configure the user_token of Damn Vulnerable Web Application within CSRF field while Script based authentication using ZAP?