Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/mbuesch/letmein/commit/43207cd77580410d97165d1e3c07361ba6f355
- https://github.com/mbuesch/letmein/security/advisories/GHSA-jpv7-p47h-f43j
FAQ
What is CVE-2025-52570?
CVE-2025-52570 is a documented vulnerability. 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 an...
How severe is CVE-2025-52570?
CVSS scoring is not yet available for CVE-2025-52570. Check NVD for updates.
Is there a patch for CVE-2025-52570?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.