CVE-2005-2531 describes a denial-of-service vulnerability in OpenVPN versions prior to 2.0.1. When configured with "verb 0" and without TLS authentication, the server fails to properly flush the OpenSSL error queue after failed client certificate authentication attempts, leading to errors being processed by incorrect clients. This allows remote attackers to disconnect legitimate clients through a high volume of failed authentication attempts. The vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity and no authentication required, resulting in partial availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
2.0CPE matchmatch criteria | cpe:2.3:a:openvpn:openvpn:2.0:*:*:*:*:*:*:* | ||
2.0.1_rc1CPE matchmatch criteria | cpe:2.3:a:openvpn:openvpn:2.0.1_rc1:*:*:*:*:*:*:* | ||
2.0.1_rc2CPE matchmatch criteria | cpe:2.3:a:openvpn:openvpn:2.0.1_rc2:*:*:*:*:*:*:* | ||
2.0.1_rc3CPE matchmatch criteria | cpe:2.3:a:openvpn:openvpn:2.0.1_rc3:*:*:*:*:*:*:* | ||
2.0.1_rc4CPE matchmatch criteria | cpe:2.3:a:openvpn:openvpn:2.0.1_rc4:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P
No social media mentions found for this CVE.
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.