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CVE-2025-52570
Good to know:
Date: June 23, 2025
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.
Severity Score
Related Resources (5)
Severity Score
Weakness Type (CWE)
Top Fix
Upgrade Version
Upgrade to version letmeinfwd - 10.2.1;letmein - 10.2.1;https://github.com/mbuesch/letmein.git - letmein-10.2.1
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | NONE |
| Integrity (I): | NONE |
| Availability (A): | LOW |