CVE-2022-36109

Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where supplementary groups are not set up properly. If an attacker has direct access to a container and manipulates their supplementary group access, they may be able to use supplementary group access to bypass primary group restrictions in some cases, potentially gaining access to sensitive information or gaining the ability to execute code in that container. This bug is fixed in Moby (Docker Engine) 20.10.18. Running containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade, this problem can be worked around by not using the "USER $USERNAME" Dockerfile instruction. Instead by calling ENTRYPOINT ["su", "-", "user"] the supplementary groups will be set up properly.

Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where supplementary groups are not set up properly. If an attacker has direct access to a container and manipulates their supplementary group access, they may be able to use supplementary group access to bypass primary group restrictions in some cases, potentially gaining access to sensitive information or gaining the ability to execute code in that container. This bug is fixed in Moby (Docker Engine) 20.10.18. Users should update to this version when it is available. Running containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade, this problem can be worked around by not using the "USER $USERNAME" Dockerfile instruction. Instead by calling ENTRYPOINT ["su", "-", "user"] the supplementary groups will be set up properly.

Thanks to Steven Murdoch for reporting this issue.

Impact

If an attacker has direct access to a container and manipulates their supplementary group access, they may be able to use supplementary group access to bypass primary group restrictions in some cases, potentially gaining access to sensitive information or gaining the ability to execute code in that container.

Patches

This bug is fixed in Moby (Docker Engine) 20.10.18. Users should update to this version when it is available.

Workarounds

This problem can be worked around by not using the "USER $USERNAME" Dockerfile instruction. Instead by calling ENTRYPOINT ["su", "-", "user"] the supplementary groups will be set up properly.

References

https://www.benthamsgaze.org/2022/08/22/vulnerability-in-linux-containers-investigation-and-mitigation/

For more information

If you have any questions or comments about this advisory:

• Open an issue
• Email us at [email protected]

Docker is an open source project to build, ship and run any application as a lightweight container.

Security Fix(es):

Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where supplementary groups are not set up properly. If an attacker has direct access to a container and manipulates their supplementary group access, they may be able to use supplementary group access to bypass primary group restrictions in some cases, potentially gaining access to sensitive information or gaining the ability to execute code in that container. This bug is fixed in Moby (Docker Engine) 20.10.18. Running containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade, this problem can be worked around by not using the "USER $USERNAME" Dockerfile instruction. Instead by calling ENTRYPOINT ["su", "-", "user"] the supplementary groups will be set up properly.(CVE-2022-36109)

Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where supplementary groups are not set up properly. If an attacker has direct access to a container and manipulates their supplementary group access, they may be able to use supplementary group access to bypass primary group restrictions in some cases, potentially gaining access to sensitive information or gaining the ability to execute code in that container. This bug is fixed in Moby (Docker Engine) 20.10.18. Running containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade, this problem can be worked around by not using the "USER $USERNAME" Dockerfile instruction. Instead by calling ENTRYPOINT ["su", "-", "user"] the supplementary groups will be set up properly.

Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where supplementary groups are not set up properly. If an attacker has direct access to a container and manipulates their supplementary group access, they may be able to use supplementary group access to bypass primary group restrictions in some cases, potentially gaining access to sensitive information or gaining the ability to execute code in that container. This bug is fixed in Moby (Docker Engine) 20.10.18. Running containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade, this problem can be worked around by not using the "USER $USERNAME" Dockerfile instruction. Instead by calling ENTRYPOINT ["su", "-", "user"] the supplementary groups will be set up properly.

Docker supplementary group permissions not set up properly, allowing attackers to bypass primary group restrictions in github.com/docker/docker

Server side request forgery (CVE-2022-29153)

Bypass primary group restrictions due to a flaw in the supplementary group access setup (CVE-2022-36109)

Imported Nodes/Services Information leak in moby-engine. (CVE-2022-3920)

These are all security issues fixed in the docker-20.10.23_ce-2.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the docker-stable-24.0.9_ce-15.1 package on the GA media of openSUSE Tumbleweed.

This update for docker fixes the following issues:

Docker was updated to 20.10.23-ce.

See upstream changelog at https://docs.docker.com/engine/release-notes/#201023

Docker was updated to 20.10.21-ce (bsc#1206065)

See upstream changelog at https://docs.docker.com/engine/release-notes/#201021

Security issues fixed:

• CVE-2022-36109: Fixed supplementary group permissions bypass (bsc#1205375)

• Fix wrong After: in docker.service, fixes bsc#1188447

• Add apparmor-parser as a Recommends to make sure that most users will end up with it installed even if they are primarily running SELinux.

• Allow to install container-selinux instead of apparmor-parser.

• Change to using systemd-sysusers

This update for docker fixes the following issues:

Docker was updated to 20.10.23-ce.

See upstream changelog at https://docs.docker.com/engine/release-notes/#201023

Docker was updated to 20.10.21-ce (bsc#1206065)

See upstream changelog at https://docs.docker.com/engine/release-notes/#201021

Security issues fixed:

• CVE-2022-36109: Fixed supplementary group permissions bypass (bsc#1205375)

• Fix wrong After: in docker.service, fixes bsc#1188447

• Add apparmor-parser as a Recommends to make sure that most users will end up with it installed even if they are primarily running SELinux.

• Allow to install container-selinux instead of apparmor-parser.

• Change to using systemd-sysusers

This update for docker fixes the following issues:

• CVE-2022-36109: Fixed a supplementary group permissions bypass (bsc#1205375).

Update to 20.10.23-ce (https://docs.docker.com/engine/release-notes/#201023).

• drop kubic flavor as kubic is EOL.

Update to Docker 20.10.21-ce (https://docs.docker.com/engine/release-notes/#201021 bsc#1206065).

• Fix wrong After: in docker.service, fixes bsc#1188447
• Build with Go 1.18.

This update for docker-stable fixes the following issues:

• Include historical changelog data from before the docker-stable fork. The initial changelog entry did technically provide all the necessary information, but our CVE tracking tools do not understand how the package is forked and so it seems that this package does not include fixes for ~12 years of updates. So, include a copy of the original package's changelog up until the fork point. (bsc#1250596)

• Remove git-core recommends on SLE. Most SLE systems have installRecommends=yes by default and thus end up installing git with Docker. bsc#1250508

  This feature is mostly intended for developers ('docker build git://') so most users already have the dependency installed, and the error when git is missing is fairly straightforward (so they can easily figure out what they need to install).

• Backport https://github.com/moby/moby/pull/48517. bsc#1247362

• Update to docker-buildx v0.25.0. Upstream changelog: https://github.com/docker/buildx/releases/tag/v0.25.0

• Do not try to inject SUSEConnect secrets when in Rootless Docker mode, as Docker does not have permission to access the host zypper credentials in this mode (and unprivileged users cannot disable the feature using /etc/docker/suse-secrets-enable.) bsc#1240150

• Initial docker-stable fork, forked from Docker 24.0.7-ce release (packaged on 2024-02-14). The original changelog is included below for historical reference.

This update for docker-stable fixes the following issues:

Note this update contains a already fixed references mostly.

• Remove git-core recommends on SLE to avoid pulling it in unnecessary. (bsc#1250508)

  This feature is mostly intended for developers ('docker build git://') so most users already have the dependency installed, and the error when git is missing is fairly straightforward (so they can easily figure out what they need to install).

• Include historical changelog data from before the docker-stable fork. The initial changelog entry did technically provide all the necessary information, but our CVE tracking tools do not understand how the package is forked and so it seems that this package does not include fixes for ~12 years of updates. So, include a copy of the original package's changelog up until the fork point. bsc#1250596

• Update to docker-buildx v0.25.0. Upstream changelog: https://github.com/docker/buildx/releases/tag/v0.25.0

• Update to Go 1.23 for building now that upstream has switched their 23.0.x LTSS to use Go 1.23.

• Do not try to inject SUSEConnect secrets when in Rootless Docker mode, as Docker does not have permission to access the host zypper credentials in this mode (and unprivileged users cannot disable the feature using /etc/docker/suse-secrets-enable.) bsc#1240150

• Initial docker-stable fork, forked from Docker 24.0.7-ce release (packaged on 2024-02-14). The original changelog is included below for historical reference.