CVE-2025-52570

Published June 24th, 2025

View on NVD ↗

CVSS v3

N/A

CVSS v2

N/A

Affected

PROJECT

Description

Letmein is an authenticating port knocker. Prior to version 10.2.1, The connection limiter is implemented incorrectly. It allows an arbitrary amount of simultaneously incoming connections (TCP, UDP and Unix socket) for the services letmeind and letmeinfwd. Therefore, the command line option num-connections is not effective and does not limit the number of simultaneously incoming connections. This issue has been patched in version 10.2.1.

mbuesch/letmein

Authenticated port/firewall knocking - In Rust

GitHub