Security
Headlines
HeadlinesLatestCVEs

Headline

GHSA-2mm7-x5h6-5pvq: Moby (Docker Engine) started with non-empty inheritable Linux process capabilities

Impact

A bug was found in Moby (Docker Engine) 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.

Patches

This bug has been fixed in Moby (Docker Engine) 20.10.14. Users should update to this version as soon as possible. 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. Refer to capabilities(7) for a description of how capabilities work. Note that permitted file capabilities continue to allow for privileges to be raised up to the container’s bounding set and that processes may add capabilities to their own inheritable set up to the container’s bounding set per the rules described in the manual page. In all cases the container’s bounding set provides an upper bound on the capabilities that can be assumed and provides for the container security sandbox.

Workarounds

The entrypoint of a container can be modified to use a utility like capsh(1) to drop inheritable capabilities prior to the primary process starting.

Credits

The Moby project would like to thank Andrew G. Morgan for responsibly disclosing this issue in accordance with the Moby security policy.

For more information

If you have any questions or comments about this advisory:

ghsa
#vulnerability#linux#git#docker

Navigation Menu

Skip to content

    • Actions

      Automate any workflow

    • Packages

      Host and manage packages

    • Security

      Find and fix vulnerabilities

    • Codespaces

      Instant dev environments

    • Copilot

      Write better code with AI

    • Code review

      Manage code changes

    • Issues

      Plan and track work

    • Discussions

      Collaborate outside of code

    • GitHub Sponsors

      Fund open source developers

*   The ReadME Project
    
    GitHub community articles
  • Pricing

Provide feedback

Saved searches****Use saved searches to filter your results more quickly

Sign up

  1. GitHub Advisory Database
  2. GitHub Reviewed
  3. CVE-2022-24769

Moby (Docker Engine) started with non-empty inheritable Linux process capabilities

Moderate severity GitHub Reviewed Published Mar 24, 2022 in moby/moby • Updated Apr 22, 2024

Package

gomod github.com/docker/docker (Go)

Affected versions

< 20.10.14

Patched versions

20.10.14

gomod github.com/moby/moby (Go)

Description

Published to the GitHub Advisory Database

Apr 22, 2024

Last updated

Apr 22, 2024

Related news

Gentoo Linux Security Advisory 202401-31

Gentoo Linux Security Advisory 202401-31 - Multiple vulnerabilities have been found in containerd, the worst of which could result in privilege escalation. Versions greater than or equal to 1.6.14 are affected.

CVE-2023-0628: Docker Desktop release notes

Docker Desktop before 4.17.0 allows an attacker to execute an arbitrary command inside a Dev Environments container during initialization by tricking an user to open a crafted malicious docker-desktop:// URL.

Ubuntu Security Notice USN-5776-1

Ubuntu Security Notice 5776-1 - It was discovered that containerd incorrectly handled memory when receiving certain faulty Exec or ExecSync commands. A remote attacker could possibly use this issue to cause a denial of service or crash containerd. It was discovered that containerd incorrectly set up inheritable file capabilities. An attacker could possibly use this issue to escalate privileges inside a container. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.

Red Hat Security Advisory 2022-1357-01

Red Hat Security Advisory 2022-1357-01 - Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.10.10.

RHSA-2022:2265: Red Hat Security Advisory: OpenShift Container Platform 4.6.58 security and extras update

Red Hat OpenShift Container Platform release 4.6.58 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-24769: moby: Default inheritable capabilities for linux container should be empty

RHSA-2022:1699: Red Hat Security Advisory: OpenShift Container Platform 4.7.50 security update

Red Hat OpenShift Container Platform release 4.7.50 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.7 Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-24769: moby: Default inheritable capabilities for linux container should be empty

CVE-2022-24769: Merge pull request from GHSA-2mm7-x5h6-5pvq · moby/moby@2bbc786

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 directl...

CVE-2021-21285: Docker Engine release notes

In Docker before versions 9.03.15, 20.10.3 there is a vulnerability in which pulling an intentionally malformed Docker image manifest crashes the dockerd daemon. Versions 20.10.3 and 19.03.15 contain patches that prevent the daemon from crashing.

ghsa: Latest News

GHSA-49cc-xrjf-9qf7: SFTPGo allows administrators to restrict command execution from the EventManager