CVE-2025-54870

Description

VTun-ng is a Virtual Tunnel over TCP/IP network. In versions 3.0.17 and below, failure to initialize encryption modules might cause reversion to plaintext due to insufficient error handling. The bug was first introduced in VTun-ng version 3.0.12. This is fixed in version 3.0.18. To workaround this issue, avoid blowfish-256.

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Weakness Type (CWE)

CWE-636 CWE-636

References

Other References

https://github.com/leakingmemory/vtun-ng/commit/8c63982b6c487c52db1d56ab94c266f0bc857140 https://github.com/leakingmemory/vtun-ng/security/advisories/GHSA-m3jc-27c6-2wrf

Frequently Asked Questions

What is CVE-2025-54870? +

VTun-ng is a Virtual Tunnel over TCP/IP network. In versions 3.0.17 and below, failure to initialize encryption modules might cause reversion to plaintext due to insufficient error handling. The bug was first introduced in VTun-ng version 3.0.12. This is fixed in version 3.0.18. To workaround this issue, avoid blowfish-256.

How do I check if I'm vulnerable to CVE-2025-54870? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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