CVE-2024-32473Moby IPv6 enabled on IPv4-only network interfaces

Official description

Moby is an open source container framework that is a key component of Docker Engine, Docker Desktop, and other distributions of container tooling or runtimes. In 26.0.0, IPv6 is not disabled on network interfaces, including those belonging to networks where `--ipv6=false`. An container with an `ipvlan` or `macvlan` interface will normally be configured to share an external network link with the host machine. Because of this direct access, (1) Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses, (2) if router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses, and (3) the interface will be a member of IPv6 multicast groups. This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface. The issue is patched in 26.0.2. To completely disable IPv6 in a container, use `--sysctl=net.ipv6.conf.all.disable_ipv6=1` in the `docker create` or `docker run` command. Or, in the service configuration of a `compose` file.

Affected packages & fixed versions

Affected products (as reported)

References

• https://github.com/moby/moby/security/advisories/GHSA-x84c-p2g9-rqv9 x_refsource_CONFIRM
• https://github.com/moby/moby/commit/7cef0d9cd1cf221d8c0b7b7aeda69552649e0642 x_refsource_MISC