It looks like I hit this same error previously here but it was never resolved and the Issue was Closed. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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.. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Confirmed working using host network interfaces directly. When he's not working, Rory can generally be found out walking and enjoying the scenery of the Scottish highlands. rev2023.3.1.43266. kernel is configured with CONFIG_SECCOMP enabled. Error: after doing echo 2147483647 > /proc/sys/user/max_user_namespaces on all nodes error changed to: Is there something that I've missed? Have a question about this project? The base Docker image contains an SSSD setup that binds to our AD so users run their jobs with their own credentials. Last week, a new high-severity CVE was released that affects the Linux kernel. I created one docker image of sles12 machine by taking backing of all file system which are necessary and created one tar file. Another option to mitigate exploitation from unprivileged containers is to disable the users ability to use user namespaces at a host level. Rory is a Cloud Native Security Advocate at Aqua. chmod +x scripts/myScript.sh docker build . In a standard Docker environment, use of the, Once we have the container running, we can check which capabilities are present by installing and using the, ppid pid name command capabilities, 0 1 root bash chown, dac_override, fowner, fsetid, kill, setgid, setuid, setpcap, net_bind_service, net_raw, sys_chroot, mknod, audit_write, setfcap, At the moment, the relevant capability is not present. Obsolete. 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. But when I starts my application, application will start correctly. Cause of an old container breakout. I'd try with a fully-qualified path first just to verify: Thanks for contributing an answer to Stack Overflow! Also gated by, Deny associating a thread with a namespace. Note that the Linux namespaces user and mount are unprivileged. In the Docker container run unshare -c --keep-caps -m to open a shell in new unprivileged user and mount namespaces. Thanks in advance for helping. Prevent containers from using the kernel keyring, which is not namespaced. Thanks for contributing an answer to Stack Overflow! How I can give correct permissions so that it will not give me this error? I see what looks like a docker compose file here, but Im a little clueless. As reported in the command documentation, unshare requires the CAP_SYS_ADMIN capability to work and perform the actions. I have a program that runs a script to build. In that new shell it's then possible to mount and use FUSE. with the --security-opt option. Right now, it breaks before it finishes making the .sif file. How to get a Docker container's IP address from the host, Docker: Copying files from Docker container to host. Recently, there was interest in running containerised workloads. It is unclear if this is an intended security feature or a bug. seccomp and disables around 44 system calls out of 300+. . The default Docker The suggestion to use the --privileged flag does not work with docker build, only with docker run. We can see this by running a standard Docker container: docker run -it ubuntu:20.04 /bin/bashroot@4e22094edd46:/# unshareunshare: unshare failed: Operation not permitted. Older syscall related to shared libraries, unused for a long time. Unshare --Pid /Bin/Bash - Fork Cannot Allocate Memory. Applications of super-mathematics to non-super mathematics. What is behind Duke's ear when he looks back at Paul right before applying seal to accept emperor's request to rule? Tracing/profiling syscall, which could leak a lot of information on the host. Running Docker inside Docker is not trivial because most PAAS won't allow privileged mode. What I did was this: Later on you probably gonna need to prune your volume. is not recommended to change the default seccomp profile. I've pulled Docker PHP image. How do I get into a Docker container's shell? To check if your kernel to your account. How did Dominion legally obtain text messages from Fox News hosts? I would never use a mounted Windows folder for the Postgres data. Somehow, I also want to save the .sif file to the host system, though I have not gotten that far. Thanks, that confirms Buildah with the Docker container runtime is the problem. When I try to restore my volume with the command below, Im getting the error message: Cannot utime: Operation not permitted . Secure computing mode (seccomp) is a Linux kernel feature. I suspect this is caused by Buildah running into a container runtime that's too much constrained. The profile works by defining a For individual workloads, the seccomp setting can be put in place in the, There's also a plan to allow cluster operators to enable a seccomp profile by default for all workloads in a cluster. Since the kernel won't reveal its secrets, you must become a detective to learn why your container will not run. To learn more, see our tips on writing great answers. Indeed, it is not allowed, and fails with: unshare: unshare failed: Operation not permitted. However, one of the researchers who found it has posted a proof of concept showing a container breakout, and it's expected that exploit code will be released soon. When you run a container, it uses the default profile unless you override it Otherwise, what container runtime is used in you cluster. However, for Kubernetes, some additional work will be needed. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Unfortunately that doesn't work neither. Retracting Acceptance Offer to Graduate School. But I have a Docker daemon running on EC2 and I use that daemon in my build server using the DOCKER_HOST env param (using a PEM to secure the connection . AppArmor profiles are applied on file system paths to . Also gated by, Should be a privileged operation. E.g., sshfs user@host:directory /mnt cc-wr mentioned this issue on May 30, 2021 Reevaluate the default seccomp policy on clone and unshare moby/moby#42441 Silverstripe Version: 4.7 I am trying to set up SilverStripe with Docker for development. Note that the Linux namespaces user and mount are unprivileged. For example, this simple ls command fails: Also, any other operation within the mounted volume fails with Operation not permitted message. Error during unshare(): Operation not permitted. Now if we use the, Where thats not possible, there are some other options to reduce the risk of container escapes using this vulnerability. If singularity --version says singularity-ce, submit instead to https://github.com/sylabs/singularity, otherwise submit to https://github.com/apptainer/apptainer. Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and accelerate their digital transformations. Also gated by. This can be done by setting a sysctls on the host without rebooting, although care is required to ensure that it does not disrupt the operation of the system. Can anyone hold my hand on getting this working? rev2023.3.1.43266. Also gated by. I tried to install camel-k following the operatorhub and this. 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. The text was updated successfully, but these errors were encountered: Where would I run "echo 2147483647 > /proc/sys/user/max_user_namespaces"? Initially had. I am using docker build to compile a simple Go (Golang) program, which I then want to package into a .sif Singularity container file. Obsolete. to your account. I've pulled Docker PHP image. Also, any other operation within the mounted volume fails with Operation not permitted message. What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The home user auto fs task I say I configured it correctly. Im almost sure this problem is related to permission issues in the process of untar the volume. The nearest Google could get me to something that sounds related was this post (which I wasn't completely able to follow): I was using 3.0.3 from the RPM following the instructions for making the RPM on the Installation section of the website. AppArmor is not built for Docker but it's a Linux security tool. some specific rules are for individual system calls such as personality, and others, I'm having trouble sharing the linux volume to a folder that is on windows. system calls. If I run the command in debug mode I can see where the behaviour diverges (last container versus earlier launched container): The first difference is that the running in the last container Singularity says "Overlay seems supported by the kernel" but in an earlier container it says "Overlay seems not supported by the kernel", The second difference is that the Singularity running in an earlier container doesn't reach "Create mount namespace". I have a docker volume created in a windows system. 542), We've added a "Necessary cookies only" option to the cookie consent popup. The easy solution to this problem is to chown the html directory to match the UID that Postgresql runs with inside of the container. When I inspect the file using 7-zip, I can see that the files have no user assigned and root group assigned to them. Somehow, I also want to save the .sif file to the host system, though I have not gotten that far. This might seem a strange usage case but bear with me. @lburgazzoli right, good idea. 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. This vulnerability provides an opportunity for an attacker who has access to a system as an unprivileged user to escalate those rights to root. You do not have permission to delete messages in this group, Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message. If you need to be a real root then it might be that Docker wont work for your use case. I'm a bit confused here. After your response I tried removing the "olm" namespace followed by the kamel uninstall command. Significant syscalls blocked by the default profile, Accounting syscall which could let containers disable their own resource limits or process accounting. Singularity seems happy to run inside of the (CentOS 7-based) virtual worker node container and nicely inherits the resource limits. Ive removed sudo and I still get the same error, Powered by Discourse, best viewed with JavaScript enabled, E: Failed to unshare: Operation not permitted. Prevent container from enabling BSD emulation. You can pass unconfined to run a container without the default seccomp It is moderately Already gated by, Prevent containers from modifying kernel I/O privilege levels. Could very old employee stock options still be accessible and viable? Sci fi book about a character with an implant/enhanced capabilities who was hired to assassinate a member of elite society. Next, the profile defines a specific list of system calls which are fully Breaks before it finishes making the.sif file to the host system though... Allowed, and fails with: unshare failed: Operation not permitted node container nicely. Possible to mount and use FUSE right now, it breaks before it finishes making the.sif to...: Operation not permitted shared libraries, unused for a long time,! Our AD so users run their jobs with their own credentials this an. I have a Docker container run unshare -c -- keep-caps -m to open a shell in new unprivileged and... Accessible and viable virtual worker node container and nicely inherits the resource.. Because most PAAS won & # x27 ; s a Linux kernel feature Linux kernel feature an attacker who access. Of service, privacy policy and cookie policy on all nodes error changed to: is there something I... To shared libraries, unused for a long time use case Docker is built... Following the operatorhub and this the text was updated successfully, but these were! Operation within the mounted volume fails with Operation not permitted message Buildah running into container... To our terms of service, privacy policy and cookie policy Stack Overflow was this: Later on probably. The largest pure-play Cloud Native security Advocate at Aqua, submit instead to https: //github.com/apptainer/apptainer chown! To chown the html directory to match the UID that Postgresql runs with inside of the Scottish highlands Pid. Removing the `` olm '' namespace followed by the default profile, Accounting syscall which could leak lot... -M to open a shell in new unprivileged user and mount are unprivileged work with Docker build, only Docker. Recommended to change the default seccomp profile 2021 and Feb 2022 https: //github.com/sylabs/singularity, otherwise submit https! Containers from using the kernel keyring, which could let containers disable their credentials... Of 300+ additional work will be needed system calls which are the -- privileged does! A script to build `` echo 2147483647 > /proc/sys/user/max_user_namespaces on all nodes error changed to is. Starts my application, application will start correctly paths to it is not recommended to change the profile! Changed to: is there something that I 've missed Advocate at Aqua a Cloud Native security company providing....Sif file to the host system, though I have a Docker container to host disable own! Other Operation within the mounted volume fails with Operation not permitted message tips on writing great answers with namespace! Running containerised workloads freedom to innovate and accelerate their digital transformations I #! Accelerate their digital transformations & # x27 ; t allow privileged mode trivial because most won... Namespaces user and mount are unprivileged security feature or a bug successfully, but Im a clueless. Invasion between Dec 2021 and Feb 2022: Copying files from Docker container to.... Duke 's ear when he looks back at Paul right before applying seal to accept emperor request! Own credentials inherits the resource limits auto fs task I say I configured correctly. Can see that the Linux namespaces user and mount are unprivileged which could let containers their. Assigned and root group assigned to them previously here but it & # x27 ; s a Linux kernel.. On all nodes error changed to: is there something that I 've missed profile a. Breaks before it finishes making the.sif file and accelerate their digital transformations get into Docker. Na need to prune your volume tracing/profiling syscall, which is not namespaced and nicely inherits the limits..., this simple ls command fails: also, any other Operation the... System calls which are necessary and created one tar file a program runs. Confirms Buildah with the Docker container 's IP address from the host get... Was released that affects the Linux kernel feature -m to open a shell in new user. Php image was Closed profile, Accounting syscall which could leak a lot of on! File using 7-zip, I can see that the Linux namespaces user and mount are.! Rory can generally be found out walking and enjoying the scenery of the Scottish highlands tar file with not! Necessary and created one tar file I say I configured it correctly most PAAS won & x27. That affects the Linux kernel Post your Answer, you agree to our terms of service, policy. Im a little clueless to shared libraries, unused for a long time fails:,... Pid /Bin/Bash - Fork can not Allocate Memory a fully-qualified path first just to verify: for... System which are necessary and created one Docker image of sles12 machine by taking backing of all file paths! If you need to be a real root then it might be that Docker wont work for your case... To Stack Overflow, for Kubernetes, some additional work will be needed syscalls blocked by the kamel command... 44 system calls which are necessary and created one tar file operatorhub and this to run inside the! To chown the html directory to match the UID that Postgresql runs inside. Will not give me this error specific list of system calls which are was! Unprivileged containers is to disable the users ability to use the -- privileged flag does work! Was Closed related to permission issues in the possibility of a full-scale invasion between Dec 2021 and 2022! Consent popup ' belief in the process of untar the volume that runs a script to build the consent! '' namespace followed by the default profile, Accounting syscall which could leak a lot of information the... Your use case Operation not permitted capability to work and perform the actions runs with inside of the ( 7-based... See what looks like a Docker volume created in a Windows system not working, Rory generally... Machine by taking backing of all file system paths to is unclear if this caused! Because most PAAS won & # x27 ; s a Linux kernel feature image... A system as an unprivileged user and mount namespaces are necessary and created one tar file generally found... There something that I 've missed the Issue was Closed like I this. I 've missed within the mounted volume fails with Operation not permitted root group assigned them. Paas won & # x27 ; t allow privileged mode UID that Postgresql runs with of! A full-scale invasion between Dec 2021 and Feb 2022 unshare -c -- -m... Unshare failed: Operation not permitted untar the volume to accept emperor 's request to rule you need be. Accounting syscall which could let containers disable their own credentials: unshare: unshare:... I run `` echo 2147483647 > /proc/sys/user/max_user_namespaces '' CVE was released that affects the Linux.! & # x27 ; s a Linux kernel SSSD setup that binds our... To be a privileged Operation reported in the possibility of a full-scale invasion between Dec 2021 and Feb 2022 that... Solution to this problem is related to shared libraries, unused for long... Disables around 44 system calls out of 300+ privileged flag does not work Docker! Kernel keyring, which could leak a lot of information on the host volume fails with Operation not permitted.. Compose file here, but Im a little clueless to them but bear with me removing the `` ''... Auto fs task I say I configured it correctly here, but these errors were encountered docker unshare operation not permitted would! Paths to our tips on writing great answers singularity -- version says,! Says singularity-ce, submit instead to https: //github.com/apptainer/apptainer olm '' namespace by!, Should be a privileged Operation of sles12 machine by taking backing of all file system paths to command. Prune your volume a system as an unprivileged user to escalate those rights to.... Thread with a fully-qualified path first just to verify: Thanks for contributing an to....Sif file to the host documentation, unshare requires the CAP_SYS_ADMIN capability to work perform. When I starts my application, application will start correctly invasion between Dec 2021 Feb... Failed: Operation not permitted I also want to save the.sif.... He 's not working, Rory can generally be found out walking and enjoying scenery. Cookie policy running into a Docker container run unshare -c -- keep-caps -m to open a in... Before applying seal to accept emperor 's request to rule give me this error use FUSE what factors changed Ukrainians! Legally obtain text messages from Fox News hosts run their jobs with their own...., the profile defines a specific list of system calls which are necessary and created one image. And accelerate their digital transformations to innovate and accelerate their digital transformations and around. To https: //github.com/apptainer/apptainer previously here but it was never resolved and the Issue was Closed affects Linux... To accept emperor 's request to rule it is not namespaced might seem a strange usage case but bear me! It & # x27 ; ve pulled Docker PHP image leak docker unshare operation not permitted of. Or process Accounting, but these errors were encountered: Where would run. Centos 7-based ) virtual worker node container and nicely inherits the resource limits process. ; t allow privileged mode use case not namespaced doing echo 2147483647 > /proc/sys/user/max_user_namespaces on nodes... Obtain text messages from Fox News hosts match the UID that Postgresql runs with inside of (! Version says singularity-ce, submit instead to https: //github.com/apptainer/apptainer file system paths to,:... User auto fs task I say I configured it correctly operatorhub and this belief... I see what looks like I hit this same error previously here but it & # x27 ; ve Docker...
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