A demo exploit for CVE-2021-44026, a SQL injection in Roundcube# Roundcube CVE-2021-44026, a SQL injection
This repository contains a demo exploit for an [SQL injection in Roundcube](https://pentest-tools.com/blog/roundcube-exfiltrating-emails-with-cve-2021-44026).
**Disclaimer**:
This code is intended solely for educational purposes and to assist security teams in identifying vulnerabilities in their Roundcube instances.
It should only be used in ethical hacking engagements in which the security professional has written authorization to ethically exploit the target(s) included in the scope.
The authors are not liable for any misuse or illegal use of this exploit code.
## Usage
```shell
usage: exploit.py [-h] smtp_server smtp_port sender_email sender_password target_email c2_server
Roundcube CVE-2020-35730 & CVE-2021-44026 exploit
positional arguments:
smtp_server Sender SMTP server name
smtp_port Sender SMTP server port
sender_email Sender email address
sender_password Sender email password for logging into the SMTP server
target_email Target email address
c2_server The URL on which the C2 server will listen
optional arguments:
-h, --help show this help message and exit
```
When ran, the code starts a Flask server, `c2_server` in the code, which does the exploit in two steps:
1. It sends an email to a target from a given sender address. This email contains an exploit for another Roundcube vulnerability, an XSS tracked as [CVE-2020-35730](https://nvd.nist.gov/vuln/detail/CVE-2020-35730). We use it to send the requests necessary for the SQL injection from an authenticated session. All the JavaScript code that runs on the client side is in`static/fetcher.js`
2. The JavaScript code extracts all the sessions from the database and sends them back to the C2 server as a _VCARD_. On the server side, the session variables are extracted from the _VCARD_. For each authenticated session the code extracts the most recent emails received.
Note: You can use a Gmail account as the sender's email. Use `stmp.gmail.com` for the server and `587` for the port. Configure a password just for this usage by following the guide [here](https://support.google.com/mail/answer/185833?hl=en#zippy=).
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