FedoraOperating system · Fedoraproject

CVE-2022-24769

MEDIUM · 5.9 CVSS v3.1 Published 2022-03-24
Fix available
A fix is available. Upgrade to 1.1.2 / 20.10.14 or later.
See remediation →
64/100
Remediation priority · Elevated
No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-732

A sensitive file, directory, or resource is created with permissions more open than it needs, so unintended users can read or modify it. Attackers look for exactly these loose defaults. Remediation is assigning the minimum permissions required and verifying them at install time and at runtime.

General guidance for the incorrect permission assignment class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
FedoraOperating system
Affected:= 34= 35= 36
Debian LinuxOperating system
Affected:= 11.0
MobyApplication
Affected:< 20.10.14
RuncApplication
Affected:< 1.1.2

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 1.1.2 / 20.10.14 or later
Fixed in 1.1.220.10.14
Vendor patch github.com →
Recommended fix High confidence

Moby (Docker Engine) 20.10.14 (or later); Runc 1.1.2 (or later)

  1. Upgrade Moby (Docker Engine) to version 20.10.14 or later. If using a distribution package (e.g., Fedora, Debian), update via your package manager (e.g., `dnf upgrade`, `apt upgrade`, or `apt-get upgrade`).
  2. If using Runc directly, upgrade Runc to version 1.1.2 or later.
  3. After upgrading Moby/Docker Engine, stop all running containers: `docker stop $(docker ps -aq)`
  4. Delete all existing containers to reset their inheritable capabilities: `docker rm $(docker ps -aq)`
  5. Recreate containers as needed. The new containers will start with empty inheritable capabilities (the fixed behavior).
Caveat This is a security patch release with behavior change - containers now start with empty inheritable capabilities instead of non-empty. Applications relying on the previous buggy behavior may need adjustment.

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-24769 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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