What’s Vulnerable › Vulnerabilities

CVE-2024-24760: Mailcow Docker Container Exposure to Local Network

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-02 · updated 2026-06-17
• Weakness: CWE-610

Description

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`.

Affected products

• mailcow-dockerized: before 2024-01c — fixed in 2024-01c

How to fix

Upgrade to a fixed version: mailcow-dockerized 2024-01c. Check the vendor advisory for mitigations.

References

• https://github.com/mailcow/mailcow-dockerized/commit/087481ac12bfa5dd715f3630f0b1697be94f7e88
• https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-gmpj-5xcm-xxx6
• https://github.com/mailcow/mailcow-dockerized/commit/087481ac12bfa5dd715f3630f0b1697be94f7e88
• https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-gmpj-5xcm-xxx6

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