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.
Published 2005-08-24 04:00:00
Updated 2008-09-05 20:52:00
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Denial of service

Products affected by CVE-2005-2531

Exploit prediction scoring system (EPSS) score for CVE-2005-2531

1.72%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 87 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2005-2531

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
NIST
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