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CVE-2025-54870

Good to know:

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Date: August 4, 2025

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.

Severity Score

Related Resources (4)

https://github.com/leakingmemory/vtun-ng/commit/8c63982b6c487c52db1d56ab94c266f0bc857140
https://github.com/leakingmemory/vtun-ng/security/advisories/GHSA-m3jc-27c6-2wrf
https://nvd.nist.gov/vuln/detail/CVE-2025-54870
https://www.mend.io/vulnerability-database/CVE-2025-54870

Severity Score

Weakness Type (CWE)

Not Failing Securely ('Failing Open')

CWE-636

Top Fix

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Upgrade Version

Upgrade to version https://github.com/leakingmemory/vtun-ng.git - v3.0.17

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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): HIGH
Integrity (I): NONE
Availability (A): NONE

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