[botty-mcbottington]

This PR contains the following updates:

Package	Change	Age	Confidence
github.com/docker/docker	v28.3.2+incompatible → v28.3.3+incompatible

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Moby firewalld reload makes published container ports accessible from remote hosts

CVE-2025-54388 / GHSA-x4rx-4gw3-53p4

More information

Details

Moby is an open source container framework developed by Docker Inc. that is distributed as Docker Engine, Mirantis Container Runtime, and various other downstream projects/products. The Moby daemon component (dockerd), which is developed as moby/moby is commonly referred to as Docker, or Docker Engine.

Firewalld is a daemon used by some Linux distributions to provide a dynamically managed firewall. When Firewalld is running, Docker uses its iptables backend to create rules, including rules to isolate containers in one bridge network from containers in other bridge networks.

Impact

The iptables rules created by Docker are removed when firewalld is reloaded using, for example "firewall-cmd --reload", "killall -HUP firewalld", or "systemctl reload firewalld".

When that happens, Docker must re-create the rules. However, in affected versions of Docker, the iptables rules that prevent packets arriving on a host interface from reaching container addresses are not re-created.

Once these rules have been removed, a remote host configured with a route to a Docker bridge network can access published ports, even when those ports were only published to a loopback address. Unpublished ports remain inaccessible.

For example, following a firewalld reload on a Docker host with address 192.168.0.10 and a bridge network with subnet 172.17.0.0/16, running the following command on another host in the local network will give it access to published ports on container addresses in that network: ip route add 172.17.0.0/16 via 192.168.0.10.

Containers running in networks created with --internal or equivalent have no access to other networks. Containers that are only connected to these networks remain isolated after a firewalld reload.

Where Docker Engine is not running in the host's network namespace, it is unaffected. Including, for example, Rootless Mode, and Docker Desktop.

Patches

Moby releases older than 28.2.0 are not affected. A fix is available in moby release 28.3.3.

Workarounds

After reloading firewalld, either:

• Restart the docker daemon,
• Re-create bridge networks, or
• Use rootless mode.

References

https://firewalld.org/
https://firewalld.org/documentation/howto/reload-firewalld.html

Severity

• CVSS Score: 5.1 / 10 (Medium)
• Vector String: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

References

• https://github.com/moby/moby/security/advisories/GHSA-x4rx-4gw3-53p4
• https://github.com/moby/moby/pull/50506
• https://github.com/moby/moby/commit/bea959c7b793b32a893820b97c4eadc7c87fabb0
• https://nvd.nist.gov/vuln/detail/CVE-2025-54388
• https://github.com/advisories/GHSA-x4rx-4gw3-53p4

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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Release Notes

docker/docker (github.com/docker/docker)

v28.3.3+incompatible

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.48%. Comparing base (0904962) to head (e1925dc).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #486   +/-   ##
=======================================
  Coverage   63.48%   63.48%           
=======================================
  Files          58       58           
  Lines        3185     3185           
=======================================
  Hits         2022     2022           
  Misses        906      906           
  Partials      257      257           

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