Moby is an open-source project created by Docker to enable and accelerate software containerization. A bug was found in Moby (Docker Engine) prior to version 20.10.14 where containers were incorrectly started with non-empty inheritable Linux process capabilities, creating an atypical Linux environment and enabling programs with inheritable file capabilities to elevate those capabilities to the permitted set during `execve(2)`. Normally, when executable programs have specified permitted file capabilities, otherwise unprivileged users and processes can execute those programs and gain the specified file capabilities up to the bounding set. Due to this bug, containers which included executable programs with inheritable file capabilities allowed otherwise unprivileged users and processes to additionally gain these inheritable file capabilities up to the container's bounding set. Containers which use Linux users and groups to perform privilege separation inside the container are most directly impacted. This bug did not affect the container security sandbox as the inheritable set never contained more capabilities than were included in the container's bounding set. This bug has been fixed in Moby (Docker Engine) 20.10.14. Running containers should be stopped, deleted, and recreated for the inheritable capabilities to be reset. This fix changes Moby (Docker Engine) behavior such that containers are started with a more typical Linux environment. As a workaround, the entry point of a container can be modified to use a utility like `capsh(1)` to drop inheritable capabilities prior to the primary process starting.
CVSS Details
- CVSS 3.1 Base Score: 5.9
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade containerdUpgrade docker | Aug 22, 2024 | Mar 24, 2022 |
| Amazon Linux Ami 2 | — | Upgrade dockerUpgrade docker-debuginfoUpgrade runcUpgrade runc-debuginfoUpgrade containerd-stressUpgrade containerdUpgrade containerd-debuginfoUpgrade ecs-init | Jul 4, 2022 | Mar 24, 2022 |
| Amazon_linux | — | Upgrade containerdUpgrade docker | Apr 29, 2022 | Mar 24, 2022 |
| Amazon_linux_2023 | — | Upgrade containerd-stress-debuginfoUpgrade containerd-stressUpgrade containerdUpgrade containerd-debuginfoUpgrade containerd-debugsource | Feb 17, 2025 | Mar 23, 2022 |
| Debian | — | Upgrade containerd | Nov 7, 2022 | Mar 24, 2022 |
| Dell Powerstore Dsa2023129 | — | Upgrade Dell PowerStoreOS to the latest version | Jan 13, 2026 | Apr 4, 2023 |
| Gentoo Linux | — | Upgrade app-containers/containerd. | Feb 1, 2024 | Mar 24, 2022 |
| Huawei Euleros 2_0_sp10 | — | Upgrade docker-engine | Aug 2, 2022 | Mar 24, 2022 |
| Huawei Euleros 2_0_sp5 | — | Upgrade docker-engineUpgrade docker-engine-selinux | Jun 17, 2022 | Mar 24, 2022 |
| Huawei Euleros 2_0_sp8 | — | Upgrade docker-engine-selinuxUpgrade docker-engine | Jun 22, 2022 | Mar 24, 2022 |
| Huawei Euleros 2_0_sp9 | — | Upgrade docker-engine | Jul 11, 2022 | Mar 24, 2022 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Mar 24, 2022 |
| Suse | — | Upgrade docker-kubic-zsh-completionUpgrade containerd-ctrUpgrade docker-kubic-kubeadm-criconfigUpgrade docker-kubic-bash-completionUpgrade docker-zsh-completionUpgrade docker-kubic-fish-completionUpgrade docker-bash-completionUpgrade dockerUpgrade docker-fish-completionUpgrade docker-kubicUpgrade containerdUpgrade containerd-devel | Oct 26, 2022 | Mar 24, 2022 |
| Ubuntu | — | Upgrade containerd | Dec 13, 2022 | Mar 24, 2022 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Mar 24, 2022 |
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