CVE-2005-2531 Affecting openvpn package, versions <2.0.2-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
1.97% (78th percentile)

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  • Snyk IDSNYK-ECHOLATEST-OPENVPN-18860372
  • published16 Aug 2026
  • disclosed24 Aug 2005

Introduced: 24 Aug 2005

CVE-2005-2531  (opens in a new tab)

How to fix?

Upgrade Echo:latest openvpn to version 2.0.2-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openvpn package and not the openvpn package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers to cause a denial of service (client disconnection) via a large number of failed authentication attempts.

CVSS Base Scores

version 3.1