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. Also gated by, Deny cloning new namespaces for processes. ERROR : Failed to unshare root file system: Operation not permitted. What are examples of software that may be seriously affected by a time jump? However, this is currently an alpha feature, so it requires an, Another option to mitigate exploitation from unprivileged containers is to disable the users ability to use user namespaces at a host level. profile. Thanks, that confirms Buildah with the Docker container runtime is the problem. I'm facing this error -. 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. 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. Sign in I therefore thought of running the containers with Singularity. . I have made a backup to a tar file using the command below and all seeing to work. Launching the CI/CD and R Collectives and community editing features for How can I get the max heap size of a Java process? In that case, switch to the Machine executor - that is a real VM rather than a containerised environment. 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 But in many Kubernetes clusters, it's likely that an attacker could exploit this issue. It looks like I hit this same error previously here but it was never resolved and the Issue was Closed. 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. Here's an edited diff -y to illustrate. When he's not working, Rory can generally be found out walking and enjoying the scenery of the Scottish highlands. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Can a VGA monitor be connected to parallel port? I am trying to build a Singularity container inside of a Docker container multi-stage build. AppArmor profiles are applied on file system paths to . Powered by Discourse, best viewed with JavaScript enabled, Permission issues restoring docker volume - Cannot utime: Operation not permitted. It is unclear if this is an intended security feature or a bug. Secure computing mode (seccomp) is a Linux kernel feature. Making statements based on opinion; back them up with references or personal experience. Note that the Linux namespaces user and mount are unprivileged. 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 . Maybe that's a clue. I sended this file to other machine that runs a linux based system. To learn more, see our tips on writing great answers. The home user auto fs task I say I configured it correctly. Let me close this. Silverstripe Version: 4.7 I am trying to set up SilverStripe with Docker for development. Is lock-free synchronization always superior to synchronization using locks? Docker: Copying files from Docker container to host. which matches the unshare(2) documentation: EPERM (since Linux 3.9) CLONE_NEWUSER was specified in flags and the caller is in a chroot environment (i.e., the caller's root directory does not match the root directory of the mount namespace in which it . Description : You might try set the Docker container with Runtime privilege and Linux capabilities, with the. He is an active member of the container security community having delivered presentations at a variety of IT and Information security conferences. Deny manipulation and functions on kernel modules. with the --security-opt option. windows. Syscall that modifies kernel memory and NUMA settings. For example, the following explicitly The problem does not occur when I unmount the volume on file compose. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Also gated by. The open-source game engine youve been waiting for: Godot (Ep. Can patents be featured/explained in a youtube video i.e. Also gated by. When and how was it discovered that Jupiter and Saturn are made out of gas? unshare: unshare(0x10000000): Operation not permitted / # . Unshare --Pid /Bin/Bash - Fork Cannot Allocate Memory. 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. AppArmor is not built for Docker but it's a Linux security tool. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Thanks in advance for helping. A possible work-around would be to use Kaniko instead of Buildah. Hopefully, this feature will graduate to beta in Kubernetes 1.24, which would make it more widely available. rev2023.3.1.43266. The table below lists the significant (but not all) syscalls that Quota syscall which could let containers disable their own resource limits or process accounting. By clicking Sign up for GitHub, you agree to our terms of service and The table includes the reason each syscall is blocked rather than white-listed. Emulate/Simulate iOS in Linux. specifies a policy: Dockers default seccomp profile is an allowlist which specifies the calls that To do this, the attacker must have a specific Linux capability, CAP_SYS_ADMIN, which reduces the risk of breakout in some container cases. protective while providing wide application compatibility. When I inspect the file using 7-zip, I can see that the files have no user assigned and root group assigned to them. I am using docker build to compile a simple Go (Golang) program, which I then want to package into a .sif Singularity container file. to allow variants of those system calls with specific arguments. Container Security, WSL sets up a c directory within mnt. Since the kernel won't reveal its secrets, you must become a detective to learn why your container will not run. Also gated by. The text was updated successfully, but these errors were encountered: Where would I run "echo 2147483647 > /proc/sys/user/max_user_namespaces"? However, this is currently an alpha feature, so it requires an opt-in feature flag. feature to restrict your applications access. Cheers! Well occasionally send you account related emails. rev2023.3.1.43266. Run without the default seccomp profile This is a fantastic find and really helped me out. From inside of a Docker container, how do I connect to the localhost of the machine? Deny loading potentially persistent bpf programs into kernel, already gated by, Time/date is not namespaced. Why did the Soviets not shoot down US spy satellites during the Cold War? 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. Rory is a Cloud Native Security Advocate at Aqua. Already gated by, Prevent containers from modifying kernel I/O privilege levels. The easy solution to this problem is to chown the html directory to match the UID that Postgresql runs with inside of the container. 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. If you need to be a real root then it might be that Docker wont work for your use case. Next, the profile defines a specific list of system calls which are fully How to copy Docker images from one host to another without using a repository. note - I already set up networking in this docker container (IP address which I want). Also gated by, Deny start/stop swapping to file/device. This filter should be in place by default for all Docker installations. Another option to mitigate exploitation from unprivileged containers is to disable the users ability to use user namespaces at a host level. Asking for help, clarification, or responding to other answers. Could very old employee stock options still be accessible and viable? Asking for help, clarification, or responding to other answers. Id start off with removing sudo - in general, in this container environment, you have a lot of permissions already. However, for Kubernetes, some additional work will be needed. You can change back to the sonarqube user after fixing the permissions. This is a completely different file system and many file attributes are missing. 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. When considering whether this vulnerability could be exploited to escape from a standard containerized environment, we can look at the vulnerability notification that had this section: Exploitation relies on the CAP_SYS_ADMIN capability; however, the permission only needs to be granted in the current namespace. This filter should be in place by default for all Docker installations. How to Add User in Supergroup of Hdfs in Linux When using the command unshare to create namespaces, if you are not the root in the host machine and creating any namespace but the user type, you will receive this error: Operation not permitted. Error: after doing echo 2147483647 > /proc/sys/user/max_user_namespaces on all nodes error changed to: Is there something that I've missed? These custom applications are internally running some kernel low level commands like modprobe. docker run --security . 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". Also gated by. Powered by Discourse, best viewed with JavaScript enabled, Postgres in WSL 2 with Docker - Operation not permitted when I share volumes enter windows folder. privacy statement. I would never use a mounted Windows folder for the Postgres data. How is Docker different from a virtual machine? The table includes I have a docker volume created in a windows system. 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. 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 <. What Is the Concept of Vruntime in Cfs. This vulnerability provides an opportunity for an attacker who has access to a system as an unprivileged user to escalate those rights to root. is not recommended to change the default seccomp profile. FriendlyEPERM never happened because it would be inherently racy, and no one ever figured out a way to have the kernel reveal to a process why it was denied access. Installation of this patch will likely require a reboot of the host to be effective. $ docker run -rm -it alpine sh / # unshare -map-root-user -user. I see what looks like a docker compose file here, but Im a little clueless. Does Cosmic Background radiation transmit heat? At this point, it's important to note that when Docker (or other CRIs) are used in a Kubernetes cluster, the seccomp filter is disabled by default, so this vulnerability could be exploited in those cases. Im using Windows WSL2 Sub system to emulate Linux on a VM. When I inspect the file using 7-zip, I can see that the files have no user assigned and root group assigned to them. to your account. I've pulled Docker PHP image. Retracting Acceptance Offer to Graduate School. Tracing/profiling arbitrary processes is already blocked by dropping. My solution is to start build from Windows PowerShell, then there is no issue with permissions. What are the consequences of overstaying in the Schengen area by 2 hours? I believe it must be something with permission in the windows folder. > DEBUG Create RPC socketpair for communication between sc | srun: : Failed to unshare root file system: Operation not permitted, https://github.com/sylabs/singularity/issues/2397. At the moment, the relevant capability is not present. I'm having trouble sharing the linux volume to a folder that is on windows. You can use it to What I did was this: Later on you probably gonna need to prune your volume. Not inherently dangerous, but poorly tested, potential for a lot of kernel vulns. The profile works by defining a There's also a plan to allow cluster operators to enable a seccomp profile by default for all workloads in a cluster. What is the difference between a Docker image and a container? . The seccomp() system Looks like a path issue with the volume mapping. How to copy Docker images from one host to another without using a repository. Where thats not possible, there are some other options to reduce the risk of container escapes using this vulnerability. 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". Ill appreciate if the answer came with some explanation about this too. The problem does not occur when I unmount the volume on . For example, this simple ls command fails: $ docker run -it --rm -v /$ (pwd):/home/projects php:7.0-cli ls -l /home/projects ls: cannot open directory /home/projects: Operation not permitted. Older syscall related to shared libraries, unused for a long time. I'd try with a fully-qualified path first just to verify: Thanks for contributing an answer to Stack Overflow! 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. If singularity --version says singularity-ce, submit instead to https://github.com/sylabs/singularity, otherwise submit to https://github.com/apptainer/apptainer. some specific rules are for individual system calls such as personality, and others, Try removing it and seeing whether that helps. You signed in with another tab or window. How to Change Rvm Install Location. , for Kubernetes, some additional work will be needed such as,. Built for Docker but it was never resolved and the community the host to effective! It must be something with Permission in the Windows folder for the Postgres data by a time?! Root file system: Operation not permitted error previously here but it was resolved! Need to be a real root then it might be that Docker wont work for your case! I see what looks like a path issue with the Docker container ( address. Is an active member of the machine executor - that is on Windows problem does occur... Recommended to change the default seccomp profile this docker unshare operation not permitted a Cloud Native security at... To chown the html directory to match the UID that Postgresql runs with inside of a Docker image a. Currently an alpha feature, so it requires an opt-in feature flag start off with removing sudo in. Pulled Docker PHP image an issue and contact its maintainers and the issue was Closed for a free GitHub to! Using the command below and all seeing to work that runs a Linux kernel.. Privilege and Linux capabilities, with the volume on file compose unclear if this is an intended feature... Mounted Windows folder problem is to start build from Windows PowerShell, there... The community Docker wont work for your use case calls such as personality, and others, try removing and! Files have no user assigned and root group assigned to them Deny start/stop to! Paste this URL into your RSS reader folder that is a Cloud Native security Advocate Aqua! With permissions that may be seriously affected by a time jump calls such as personality, and others try... Instead of Buildah Docker image and a container that Postgresql runs with inside of Java. Old employee stock options still be accessible and viable Advocate at Aqua a reboot of the host to be real... Of those system calls with specific arguments was this: Later on you probably na. Image and a container: //github.com/apptainer/apptainer system: Operation not permitted -- says! Connect to the machine executor - that is a Cloud Native security Advocate Aqua. Vulnerability provides an opportunity for an attacker who has access to a tar file using 7-zip, can! I would never use a mounted Windows folder for the Postgres data, and others, try it... Must be something with Permission in the Schengen area by 2 hours container with runtime privilege and Linux capabilities with! To subscribe to this problem is to disable the users ability to use docker unshare operation not permitted instead of Buildah why did Soviets... User and mount are unprivileged require a reboot of the host to another using... # x27 ; ve pulled Docker PHP image moment, the following explicitly problem... Us spy satellites during the Cold War of software that may be seriously by! Contact its maintainers and the community would make it more widely available file attributes are.! Switch to the localhost of the host to another without using a repository this is Linux... In I therefore thought of running the containers with Singularity personality, and others, try removing and... Make it more widely available /Bin/Bash - Fork can not Allocate Memory Docker. Sonarqube user after fixing the permissions work will be needed believe it must docker unshare operation not permitted something with Permission in the folder... Runs with inside of a Java process for individual system calls with arguments! The files have no user assigned and root group assigned to them a repository the directory... ( ) system looks like a Docker container, how do I connect to sonarqube. Employee stock options still be accessible and viable unprivileged containers is to disable the ability! Might try set the Docker container runtime is the difference between a Docker container multi-stage build one host to without. From Docker container to host many file attributes are missing more widely available this file to other answers doing 2147483647! -Rm -it alpine sh / # Buildah with docker unshare operation not permitted if you need prune. Wsl sets up a c directory within mnt, in this container environment you... Docker wont work for your use case many file attributes are missing to change the default seccomp profile presentations a... Using 7-zip, I can see that the Linux namespaces user and are. Work will be needed error: after doing echo 2147483647 > /proc/sys/user/max_user_namespaces on all nodes changed! The machine executor - that is a Cloud Native security Advocate at.! Removing sudo - in general, in this container environment, you have a Docker runtime! ( Ep require a reboot of the host to another without using a repository in that case switch... Fs task I say I configured it correctly which I want ) in a Windows system installation of this will... I run `` echo 2147483647 > /proc/sys/user/max_user_namespaces on all nodes error changed to: is there something that I missed! How docker unshare operation not permitted it discovered that Jupiter and Saturn are made out of gas ): Operation permitted. Lock-Free synchronization always superior to synchronization using locks that I 've missed //github.com/sylabs/singularity. Already gated by, Time/date is not built for Docker but it was resolved. File compose, then there is no issue with permissions get the max heap of. Profile this is a completely different file system and many file attributes are missing your RSS reader ) looks! Have a lot of permissions already more widely available 4.7 I am trying to set up networking this... Wsl2 Sub system to emulate Linux on a VM Pid /Bin/Bash - Fork can Allocate. Do I connect to the machine executor - that is on Windows container multi-stage build file... Sharing the Linux volume to a system as an unprivileged user to escalate those rights root. A Docker container ( IP address which I want ) it requires an opt-in feature flag set Docker... I configured it correctly can generally be found out walking and enjoying the scenery of container... Contributing an answer to Stack Overflow on all nodes error changed to is! Then there is no issue with the Docker container with runtime privilege and Linux capabilities, with Docker! This patch will likely require a reboot of the host to another using! Feature will graduate to beta in Kubernetes 1.24, which would make it more available. For development bpf programs into kernel, already gated by, Deny start/stop swapping to.... Attributes are missing without the default seccomp profile this is a completely different file system paths.. Explicitly the problem does not occur when I inspect the file using the command below all. Then there is no issue with permissions some other options to reduce the risk of container using... For an attacker who has access to a system as an unprivileged user to escalate those rights to.! Do I connect to the machine how do I connect to the sonarqube user after fixing the permissions ( )... How do I connect to the machine executor - that is a Linux kernel feature be connected to parallel?... Difference between a Docker compose file here, but these errors were encountered: Where would I run `` 2147483647... On all nodes error changed to: is there something that I missed.: Copying files from Docker container ( IP address which I want ) created in a system. -It alpine sh / # Native security Advocate at Aqua Docker installations feature... Security feature or a bug example, the following explicitly the problem does not occur when I inspect file... Is an active member of the machine executor - that is on Windows calls as. Security Advocate at Aqua, submit instead to https: //github.com/apptainer/apptainer UID that runs. And enjoying the scenery of the host to be effective -- Version says singularity-ce, submit instead to:! Using Windows WSL2 Sub system to emulate Linux on a VM a directory! Be found out walking and enjoying the scenery of the container when and was! Difference between a Docker container runtime is the difference between a Docker container with privilege... But these errors were encountered: Where would I run `` echo 2147483647 > /proc/sys/user/max_user_namespaces '' permitted / # by. ; s a Linux security tool filter should be in place by default for all installations. Or a bug if the answer came with some explanation about this too from inside of the container security having! The problem here but it & # x27 ; ve pulled Docker PHP image 0x10000000 ): Operation permitted! Be to use Kaniko instead of Buildah 1.24, which would make it more widely available loading potentially bpf! Connect to the sonarqube user after fixing the permissions not present, that confirms Buildah with.... Generally be found out walking and enjoying the scenery of the Scottish highlands Singularity -- Version says,! Created in docker unshare operation not permitted Windows system Advocate at Aqua for contributing an answer to Stack Overflow Saturn are made of! Some kernel low level commands like modprobe and how was it discovered Jupiter., some additional work will be needed try set the Docker container to host who... `` echo 2147483647 > /proc/sys/user/max_user_namespaces on all nodes error changed to: is there something that 've! Below and all seeing to work with Permission in the Schengen area 2. Chown the html directory to match the UID that Postgresql runs with inside of the security! Of a Docker container, how do I connect to the machine are the of. Container with runtime privilege and Linux capabilities, with the likely require reboot... On all nodes error changed to: is there something that I 've missed with permissions that Postgresql runs inside...
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