mailcow is a dockerized email package, with multiple containers linked in one bridged network. A security vulnerability has been identified in mailcow affecting versions < 2024-01c. This vulnerability potentially allows attackers on the same subnet to connect to exposed ports of a Docker container, even when the port is bound to 127.0.0.1. The vulnerability has been addressed by implementing additional iptables/nftables rules. These rules drop packets for Docker containers on ports 3306, 6379, 8983, and 12345, where the input interface is not br-mailcow and the output interface is br-mailcow.
The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mailcow:_dockerized | Mailcow | * | 2024-01c (excluding) |