CVE-2005-2531
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…
Does this matter?
Lower severity and a low EPSS score (1.97%). Track it; it rarely justifies an emergency change on its own.
Description
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 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
- EPSS
- 1.97% probability · 79th percentile
- CISA KEV
- Not listed
- Affected
- openvpn/openvpn
- Source
- cve@mitre.org
References
- http://openvpn.net/changelog.html
- http://secunia.com/advisories/16463
- http://secunia.com/advisories/17103
- http://www.debian.org/security/2005/dsa-851
- http://www.mandriva.com/security/advisories?name=MDKSA-2005:145Patch, Vendor Advisory
- http://www.novell.com/linux/security/advisories/2005_20_sr.html
- http://www.securityfocus.com/bid/14605
- http://openvpn.net/changelog.html
- http://secunia.com/advisories/16463
- http://secunia.com/advisories/17103
- http://www.debian.org/security/2005/dsa-851
- http://www.mandriva.com/security/advisories?name=MDKSA-2005:145Patch, Vendor Advisory
- http://www.novell.com/linux/security/advisories/2005_20_sr.html
- http://www.securityfocus.com/bid/14605
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.