CVE-2025-52570 (GCVE-0-2025-52570)
Vulnerability from cvelistv5
Published
2025-06-24 03:13
Modified
2025-06-24 14:42
Severity ?
1.7 (Low) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
CWE
  • CWE-799 - Improper Control of Interaction Frequency
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Summary
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.
References
security-advisories@github.comhttps://github.com/mbuesch/letmein/commit/43207cd77580410d97165d1e3c07361ba6f3558c
security-advisories@github.comhttps://github.com/mbuesch/letmein/security/advisories/GHSA-jpv7-p47h-f43j
Impacted products
Vendor Product Version
mbuesch letmein Version: < 10.2.1
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