r0binak/xzk8sDockerfile e manifestos Kubernetes para reproduzir CVE-2024-3094
Manifestos Dockerfile e Kubernetes para reproduzir o CVE-2024-3094
Usamos a versão debian dos utilitários xz vulneráveis como imagem base. Também precisamos aplicar patch na biblioteca. A versão com patch da biblioteca liblzma é retirada do repositório xzbot.
FROM debian:experimental-20240311@sha256:16cc2b09c44d991d36f63153f13a7c98fb7da6bd2ba9d7cc0f48baacb7484970
# use debian with a vulnerable version of xz utils as the base image
RUN apt-get update && apt-get install -y openssh-server
RUN mkdir /var/run/sshd
RUN echo 'root:root123' | chpasswd
RUN sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config
RUN sed -i 's/#PasswordAuthentication yes/PasswordAuthentication no/' /etc/ssh/sshd_config
EXPOSE 22
COPY liblzma.so.5.6.0.patch /root/
# in order to exploit the vulnerability you must use a patched library because
# the exploit author originally hardcoded his public key
# in the patched library this key has been swapped out
ENV LD_PRELOAD=/root/liblzma.so.5.6.0.patch
# load the patched library via LD_PRELOAD
CMD ["/usr/sbin/sshd", "-D"]
Primeiro, devemos implantar um Pod simples, com a imagem montada no passo anterior:
apiVersion: v1
kind: Pod
metadata:
name: cve-2024-3094
labels:
app: cve-2024-3094
spec:
containers:
- name: cve-2024-3094
image: r0binak/xzk8s:v1
ports:
- containerPort: 22
Então, redirecione as portas:
kubectl port-forward backdoor-cve-2024-3094 2222:22
Vamos usar o exploit xzbot:
Finalmente, vamos entrar no container e verificar os resultados do exploit:
