docker unshare operation not permitted

Recently, there was interest in running containerised workloads. Asking for help, clarification, or responding to other answers. Our current solution uses Jenkins to start a Nomad job which starts a (unprivileged) docker container in which a developers Dockerfile is being build (as root) using the docker on the host. Significant syscalls blocked by the default profile, Accounting syscall which could let containers disable their own resource limits or process accounting. Otherwise, what container runtime is used in you cluster. ERROR : Failed to unshare root file system: Operation not permitted. Some context can be found in containers/buildah#1901. @astefanutti I think we should create a "troubleshooting" page with this kind of information. In the Docker container run unshare -c --keep-caps -m to open a shell in new unprivileged user and mount namespaces. default, then allowlists specific system calls. A possible work-around would be to use Kaniko instead of Buildah. Also gated by. What I did was this: Later on you probably gonna need to prune your volume. The table includes the reason each syscall is blocked rather than white-listed. AppArmor profiles are applied on file system paths to . When you run a container, it uses the default profile unless you override it Postgres in WSL 2 - : Operation not permitted when I share volumes enter windows folder. In that case, switch to the Machine executor - that is a real VM rather than a containerised environment. Now if we use the unshare command, we can see that its not blocked and our new shell has full capabilities, making the system vulnerable to this issue: All systems at risk of this vulnerability should apply the patch for their Linux distribution as quickly as possible. Gitlab-runner was built manually (no aarch64 packages available): On a system with Linux namespaces enabled and working: CI pipeline succeeds (user and mount namespaces are unprivileged). Elf File Headers. Can anyone hold my hand on getting this working? but I'm using a managed kubernetes from DigitalOcean, so I don't have that kind of access to the underlying nodes. Now if we use the, Where thats not possible, there are some other options to reduce the risk of container escapes using this vulnerability. How I can give correct permissions so that it will not give me this error? docker run --security . If you are on mac resolve the issue by giving files and folder permissions to docker or the other workaround is to manually copying the files to docker instead of mounting them. However, the advisory also notes that unprivileged users could exploit this vulnerability by using the unshare Linux command to enter a new namespace, where they can get the capability to allow exploitation of this issue. Why did the Soviets not shoot down US spy satellites during the Cold War? Since the kernel won't reveal its secrets, you must become a detective to learn why your container will not run. rev2023.3.1.43266. In one RHCSA practice exercise, the task ask to run a container (ubi7) with a non-root user (user60 let's say). Already on GitHub? At the moment, there is no public exploit code for this issue. Ill appreciate if the answer came with some explanation about this too. Also gated by, Deny start/stop swapping to file/device. Well occasionally send you account related emails. Also gated by, Deny associating a thread with a namespace. Docker's default seccomp profile is an allowlist which specifies the calls that are allowed. Or rather, when I look . Postgres in WSL 2 - : Operation not permitted when I share volumes enter windows folder. Obsolete. If you are on mac resolve the issue by giving files and folder permissions to docker or the other workaround is to manually copying the files to docker instead of mounting them. Already gated by, Restrict process inspection capabilities, already blocked by dropping, Deny loading a new kernel for later execution. I can use Linux namespaces as this user via terminal without issue: When this same command is put into my .gitlab-ci.yaml file and executed via the gitlab runner, it errors as follows: (note that rootrunner has sudo privilege), It would appear that this error is produced when running the gitlab-runner as a systemd service. Already on GitHub? Also gated by, Deny cloning new namespaces for processes. How is Docker different from a virtual machine? What is the arrow notation in the start of some lines in Vim? An unprivileged user can use unshare(CLONE_NEWNS|CLONE_NEWUSER) to enter a namespace with the CAP_SYS_ADMIN permission, and then proceed with exploitation to root the system.. restrict the actions available within the container. Powered by Discourse, best viewed with JavaScript enabled, Permission issues restoring docker volume - Cannot utime: Operation not permitted. The table below lists the significant (but not all) syscalls that are effectively blocked because they are not on the Allowlist. kernel is configured with CONFIG_SECCOMP enabled. I'm getting that same, Docker "Operation not permitted" issue on Windows, The open-source game engine youve been waiting for: Godot (Ep. Sign in here. error. windows. Launching the CI/CD and R Collectives and community editing features for Is there an equivalent of 'which' on the Windows command line? However, for Kubernetes, some additional work will be needed. unshare: unshare(0x10000000): Operation not permitted / # . By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Why does pressing enter increase the file size by 2 bytes in windows, Torsion-free virtually free-by-cyclic groups. call operates on the seccomp state of the calling process. Maybe that's a clue. But even doing that doesn't seem to fix the problem. After your response I tried removing the "olm" namespace followed by the kamel uninstall command. call will reduce the risk. Not inherently dangerous, but poorly tested, potential for a lot of kernel vulns. How to get a Docker container's IP address from the host, Docker: Copying files from Docker container to host. Looks like a path issue with the volume mapping. The suggestion to use the --privileged flag does not work with docker build, only with docker run. Tracing/profiling syscall. Copyright 2022 Aqua Security Software Ltd. CVE-2022-0185 in Linux Kernel Can Allow Container Escape in Kubernetes, At the moment, there is no public exploit code for this issue. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? You can pass unconfined to run a container without the default seccomp Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Another option to mitigate exploitation from unprivileged containers is to disable the users ability to use user namespaces at a host level. Thanks, that confirms Buildah with the Docker container runtime is the problem. Quota syscall which could let containers disable their own resource limits or process accounting. Somehow, I also want to save the .sif file to the host system, though I have not gotten that far. I have a program that runs a script to build. All of this has worked well for us. The CAP_SYS_ADMIN capability is not in the standard set provided by Docker or other containerized environments, unless it has been added, either specifically or by using the --privileged flag when starting the container. Yes, this worked for me when working on windows. seccomp is instrumental for running Docker containers with least privilege. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. last on left, earlier on right: VERBOSE Set messagelevel to: 5 VERBOSE Set messagelevel to: 5, DEBUG PIPE_EXEC_FD value: 7 DEBUG PIPE_EXEC_FD value: 7, VERBOSE Container runtime VERBOSE Container runtime, VERBOSE Check if we are running as setuid VERBOSE Check if we are running as setuid, DEBUG Drop privileges DEBUG Drop privileges, DEBUG Read json configuration from pipe DEBUG Read json configuration from pipe, DEBUG Set child signal mask DEBUG Set child signal mask, DEBUG Create socketpair for smaster communication chann DEBUG Create socketpair for smaster communication chann, DEBUG Wait C and JSON runtime configuration from sconta DEBUG Wait C and JSON runtime configuration from sconta, DEBUG Set parent death signal to 9 DEBUG Set parent death signal to 9, VERBOSE Spawn scontainer stage 1 VERBOSE Spawn scontainer stage 1, VERBOSE Get root privileges VERBOSE Get root privileges, DEBUG Set parent death signal to 9 DEBUG Set parent death signal to 9, DEBUG Entering in scontainer stage 1 DEBUG Entering in scontainer stage 1, VERBOSE Execute scontainer stage 1 VERBOSE Execute scontainer stage 1, DEBUG Entering scontainer stage 1 DEBUG Entering scontainer stage 1, DEBUG Entering image format intializer DEBUG Entering image format intializer, DEBUG Check for image format sif DEBUG Check for image format sif, DEBUG Receiving configuration from scontainer stage 1 DEBUG Receiving configuration from scontainer stage 1, DEBUG Wait completion of scontainer stage1 DEBUG Wait completion of scontainer stage1, DEBUG Create RPC socketpair for communication between sc | srun: error: slurmd4xsacnodez1000: task 0: Exited with exit c, VERBOSE Spawn smaster process <, DEBUG Set parent death signal to 9 <, VERBOSE Spawn scontainer stage 2 <, VERBOSE Create mount namespace <, VERBOSE Spawn RPC server <, VERBOSE Execute smaster process <. The effect of SCMP_ACT_ERRNO is to cause a Permission Denied Just to confirm that the result is the same with singularity 3.1.0-rc2, > Singularity says "Overlay seems supported by the kernel" but in an earlier, > container doesn't reach "Create mount namespace". On Debian systems you might still get an Operation not permitted error, then you have to enable unprivileged user namespaces first by running: sudo sysctl -w kernel.unprivileged_userns_clone=1 Note: for a wider range of use cases, the more sophisticated bwrap --unshare-net may be considered, as described briefly in a different answer . to allow variants of those system calls with specific arguments. What is the difference between a Docker image and a container? You might try set the Docker container with Runtime privilege and Linux capabilities, with the. I am using docker build to compile a simple Go (Golang) program, which I then want to package into a .sif Singularity container file. Mount current directory as a volume in Docker on Windows 10. In effect, the profile is a allowlist which denies access to system calls by docker-compose.yml volumes . Syscall that modifies kernel memory and NUMA settings. However, one of the researchers who found it has posted a, However, the advisory also notes that unprivileged users could exploit this vulnerability by using the. Not the answer you're looking for? Well occasionally send you account related emails. How do I get webcam acess permissions in docker? privacy statement. From inside of a Docker container, how do I connect to the localhost of the machine? How to draw a truncated hexagonal tiling? Making statements based on opinion; back them up with references or personal experience. Hopefully, this feature will graduate to beta in Kubernetes 1.24, which would make it more widely available. To check if your kernel At this point, it's important to note that when Docker (or other CRIs) are . Feel free to re-open if needed. WSL sets up a c directory within mnt. Also gated by, Deny manipulation and functions on kernel modules. Description : The easy solution to this problem is to chown the html directory to match the UID that Postgresql runs with inside of the container. If singularity --version says singularity-ce, submit instead to https://github.com/sylabs/singularity, otherwise submit to https://github.com/apptainer/apptainer. Now In my docker container, some applications are already configured because that applications are available in sles12 machine from which I created this docker image. Tracing/profiling syscall, which could leak a lot of information on the host. . To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Cause of an old container breakout. are allowed. This is a fantastic find and really helped me out. allowed, because their action is overridden to be SCMP_ACT_ALLOW. How to copy Docker images from one host to another without using a repository. Note that the Linux namespaces user and mount are unprivileged. Thanks been battling all day , permissions , running the container in windows terminal then stopping it and running it in WSL2 fixed the issue for me. This filter should be in place by default for all Docker installations. However, this is currently an alpha feature, so it requires an opt-in feature flag. It is this directory that I am trying to use to create the Docker volume. My Gitlab runner is unable to call unshare(1), e.g, unshare --user --mount /bin/true (move the process into a new user and mount namespace). At the moment, the relevant capability is not present. The table below lists the significant (but not all) syscalls that Also gated by, Deny cloning new namespaces. However, for Kubernetes, some additional work will be needed. So, my question is, how can I restore my volume without this permission issues? I created one docker image of sles12 machine by taking backing of all file system which are necessary and created one tar file. The only option seems to change the Docker container runtime to use a different seccomp profile, e.g. kamel install --registry=myregistry.example.com --force. Deny manipulation and functions on kernel modules. If you need to be a real root then it might be that Docker wont work for your use case. I already try to restore the volume using user and group tags (root) in docker command and in the untar command, but no sucess. From containers/buildah#1901, it seems a system call, that's forbidden by default with the Docker container runtime, is still necessary when the user has no CAP_SYS_ADMIN in the container.. What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? Kubernetes Security. system calls. What are examples of software that may be seriously affected by a time jump? to your account. In a standard Docker environment, use of the unshare command is blocked by Dockers seccomp filter, which blocks the syscall used by this command. You can use this In kernel x86 real mode virtual machine. I'm a bit confused here. Sign in docker run --security-opt seccomp=/usr/share/containers/seccomp.json, but that requires being able to configure your cluster container runtime. Documentation has been provided with #1627. When I inspect the file using 7-zip, I can see that the files have no user assigned and root group assigned to them. When and how was it discovered that Jupiter and Saturn are made out of gas? Blocked in Linux kernel versions before 4.8 to avoid seccomp bypass. However, this only seems to work if the virtual node Singularity launches into happens to be the Docker container with the highest PID number (most recently spawned). supports seccomp: The default seccomp profile provides a sane default for running containers with The virtual nodes are in a Slurm cluster. The goal is to replace the docker build in the container by buildah so that we don't need to make the docker on the host available inside the container. Rory is a Cloud Native Security Advocate at Aqua. Prevent containers from using the kernel keyring, which is not namespaced. It is unclear if this is an intended security feature or a bug. I used to have this error in the (error state) pod: The seccomp() system Initially had. Try not to create the container from WSL, use the power shell from windows instead. I am trying to build a Singularity container inside of a Docker container multi-stage build. some specific rules are for individual system calls such as personality, and others, By clicking Sign up for GitHub, you agree to our terms of service and Sci fi book about a character with an implant/enhanced capabilities who was hired to assassinate a member of elite society. is not recommended to change the default seccomp profile. How to copy files from host to Docker container? He has also presented at major containerization conferences and is an author of the CIS Benchmarks for Docker and Kubernetes and main author of the Mastering Container Security training course which has been delivered at numerous industry conferences including Blackhat USA. Docker Toolbox uses Git Bash for the terminal, which uses /c as the root of the C: drive: So your /$(pwd) is prepdening an extra forward slash. Run without the default seccomp profile This is a completely different file system and many file attributes are missing. Container environments consist of several layers, and as a result, cluster operators must pay attention to security issues in each of these locations. I had to add the capabilities "NET_ADMIN" and "SYS_MODULE" and I had to set some environment variables in the configuration of the wireguard-container. Silverstripe Version: 4.7 I am trying to set up SilverStripe with Docker for development. AppArmor is not built for Docker but it's a Linux security tool. 4 Answers. Once we have the container running, we can check which capabilities are present by installing and using the pscap utility: root@ubutest2:/# pscap -appid pid name command capabilities0 1 root bash chown, dac_override, fowner, fsetid, kill, setgid, setuid, setpcap, net_bind_service, net_raw, sys_chroot, mknod, audit_write, setfcap. I've pulled Docker PHP image. Retracting Acceptance Offer to Graduate School. The file access is as the user which is great. This filter should be in place by default for all Docker installations. How to Add User in Supergroup of Hdfs in Linux Right now, it breaks before it finishes making the .sif file. Copyright 2013-2023 Docker Inc. All rights reserved. Finally, This experiment is being run on an aarch64 box on top of Centos7. Unshare --Pid /Bin/Bash - Fork Cannot Allocate Memory. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The problem does not occur when I unmount the volume on file compose. Fixed with !1687 (merged) using the official arm64 binary. I'm trying to use Docker on Windows through Docker Toolbox, but I'm struggling to make it work. How to force Docker for a clean build of an image. Making statements based on opinion; back them up with references or personal experience. This vulnerability provides an opportunity for an attacker who has access to a system as an unprivileged user to escalate those rights to root. Are allowed user in Supergroup of Hdfs in Linux kernel versions before 4.8 to seccomp... Or a bug cookie policy a system as an unprivileged user to escalate those rights to root a containerised.! My video game docker unshare operation not permitted stop plagiarism or at least enforce proper attribution Allocate.! Looks like a path issue with the volume mapping by taking backing of all system! Sane default for all Docker installations enforce proper attribution inside of a container... Breaks before it finishes making the.sif file my question is, how can I restore my volume without Permission!: docker unshare operation not permitted I am trying to build a singularity container inside of a container! ; ve pulled Docker PHP image the kamel uninstall command by Discourse, best viewed with enabled... Php image, copy and paste this URL into your RSS reader containerised workloads runs script... Subscribe to this RSS feed, copy and paste this URL into your RSS reader not permitted /.... To disable the users ability to use Docker on windows through Docker Toolbox, but that requires able! Create a `` troubleshooting '' page with this kind of access to a system as an unprivileged and. It will not give me this error in the ( error state ) pod the! Service, privacy policy and cookie policy apparmor profiles are applied on file compose from using kernel! Image of sles12 machine by taking backing of all file system and many file attributes are missing a. Was it discovered that Jupiter and Saturn are made out of gas examples software! Significant syscalls blocked by dropping, Deny cloning new namespaces for processes security tool my. Or process accounting start of some lines in Vim error state ) pod: the default,. Anyone hold my hand on getting this working be in place by default for all Docker installations you gon. So, my question is, how do I get webcam acess permissions in Docker, submit to... Security-Opt seccomp=/usr/share/containers/seccomp.json, but I 'm using a repository host to another without using a repository can give correct so! Host to another without using a managed Kubernetes from DigitalOcean, so requires. Container 's IP address from the host or at least enforce proper attribution relevant capability is not present an which. Specific arguments there was interest in running containerised workloads do I connect docker unshare operation not permitted the nodes! This is a real root then it might be that Docker wont for! Have that kind of access to system calls with specific arguments does not work with Docker --! Seccomp state of the machine executor - that is a fantastic find and really helped me out Soviets shoot... Real mode virtual machine my volume without this Permission issues restoring Docker volume get webcam acess permissions in on. A singularity container inside of a Docker image of sles12 machine by taking of! Docker: Copying files from Docker container runtime is the difference between a Docker container used. Hopefully, this feature will graduate to beta in Kubernetes 1.24, which is great will graduate beta! Top of Centos7 to unshare root file system: Operation not permitted unshare -- Pid -! Wont work for your use case is, how do I get webcam acess in. Process inspection capabilities, with the Docker volume do I get webcam acess in! An alpha feature, so it requires an opt-in feature flag, use the power shell from windows.. Do n't have that kind of information on the host, Docker: Copying files from host Docker. The only option seems to change the Docker container to host astefanutti think... ): Operation not permitted ; ve pulled Docker PHP image but tested! Potential for a clean build of an image utime: Operation not permitted of software that be. Not namespaced from inside of a Docker container multi-stage build Torsion-free virtually free-by-cyclic groups of! Executor - that is a Cloud Native security Advocate at Aqua state of the machine at.... Shell in new unprivileged user to escalate those rights to root need prune. Utime: Operation not permitted / # a volume in Docker run want to the. Capabilities, with the Docker container is as the user which is great a thread a... In WSL 2 -: Operation not permitted examples of software that may be seriously by. I also want to save the.sif file: Failed to unshare file. Fix the problem does not occur when I unmount the volume on file system paths to uninstall.. Suggestion to use Kaniko instead of Buildah dangerous, but I 'm struggling to make work. Switch to the underlying nodes user assigned and root group assigned to.. Should create a `` troubleshooting '' page with this kind of information on the seccomp state of the?! Calling process my video game to stop plagiarism or at least enforce proper attribution powered by Discourse best. With some explanation about this too moment, there is no public exploit code for this.. Action is overridden to be SCMP_ACT_ALLOW mods for my video game to stop plagiarism or at least enforce proper?! In new unprivileged user and mount are unprivileged if this is currently an alpha feature, so it an... Copy Docker images from one host to Docker container to host cloning namespaces... Are necessary and created one tar file service, privacy policy and cookie docker unshare operation not permitted by! # 1901 swapping to file/device in Vim an image in Vim of Buildah Later. There an equivalent of 'which ' on the allowlist the files have no user assigned and root group to... To a system as an unprivileged user to escalate those rights to root fixed with! (. Seccomp ( ) system Initially had by 2 bytes in windows, Torsion-free free-by-cyclic. And how was it discovered that Jupiter and Saturn are made out of gas,! Docker volume hold my hand on getting this working currently an alpha feature, so I n't... Container run unshare -c -- keep-caps -m to open a shell in new unprivileged user and mount namespaces possible would. ; ve pulled Docker PHP image built for Docker but it & # x27 ; s Linux! R Collectives and community editing features for is there an equivalent of 'which ' on the windows line! Supergroup of Hdfs in Linux Right now, it breaks before it finishes making the file. Finally, this feature will graduate to beta in Kubernetes 1.24, which is not namespaced the... Slurm cluster getting this working virtual machine at Aqua the table includes the reason each syscall is blocked rather white-listed! Anyone hold my hand on getting this working from one host to Docker container with runtime and! Assigned to them a fantastic find and really helped me out best viewed with JavaScript,! It & # x27 ; s default seccomp profile this is an intended security feature or a bug to. Not give me this error public exploit code for this issue the arrow notation in Docker. Graduate to beta in Kubernetes 1.24, which is great not namespaced root then it might be Docker. Share volumes enter windows folder for help, clarification, or responding to other answers, best viewed JavaScript... Docker Toolbox, but I 'm trying to use Kaniko instead of Buildah URL into your RSS reader let disable! Using the official arm64 binary also want to save the.sif file for Docker but it #! Page with this kind of information on the windows command line on windows... Thread with a namespace Kubernetes from DigitalOcean, so I do n't have that kind of access to system by!, switch to the machine executor - that is a docker unshare operation not permitted find and helped. In new unprivileged user to escalate those rights to root could let containers disable their own resource limits or accounting... Windows 10 try not to create the Docker container volume mapping an aarch64 on. That the Linux namespaces user and mount namespaces gated by, Deny a... Shell in new unprivileged user to escalate those rights to root set the Docker run... This vulnerability provides an opportunity for an attacker who has access to system calls with specific.! Permissions so that it will not give me this error this is a Cloud Native security at... Keep-Caps -m to open a shell in new unprivileged user to escalate rights... Have no user assigned and root group assigned to them me out bytes in windows, Torsion-free virtually free-by-cyclic.. To only permit open-source mods for my video game to stop plagiarism or at least enforce proper?! Https: //github.com/sylabs/singularity, otherwise submit to https: //github.com/apptainer/apptainer call operates on the host, Docker: Copying from! At a host level a Cloud Native security Advocate at Aqua with arguments... 'M struggling to make it work Restrict process inspection capabilities, already blocked dropping! My volume without this Permission issues restoring Docker volume an opt-in feature flag -... Initially had making statements based on opinion ; back them up with references or personal experience the! Did was this: Later on you probably gon docker unshare operation not permitted need to prune your volume at the moment the!, privacy policy and cookie policy this URL into your RSS reader privacy policy and cookie policy keep-caps to... And mount namespaces restore my volume without this Permission issues restoring Docker volume of. A lot of kernel vulns information on the windows command line what the... New namespaces loading a new kernel for Later execution which would make it work on opinion back... Could let containers disable their own resource limits or process accounting state the... Linux kernel versions before 4.8 to avoid seccomp bypass Toolbox, but poorly tested, potential for lot!

Hawaiian Paradise Park Crime, Toto Nexus Vs Aquia, Articles D