Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openvpn | Openvpn | 2.0 |
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-2005:145PatchVendor 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-2005:145PatchVendor Advisory
- http://www.novell.com/linux/security/advisories/2005_20_sr.html
- http://www.securityfocus.com/bid/14605
FAQ
What is CVE-2005-2531?
CVE-2005-2531 is a vulnerability with a CVSS score of 5.0 (MEDIUM). 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...
How severe is CVE-2005-2531?
CVE-2005-2531 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2005-2531?
Check the references section above for vendor advisories and patch information. Affected products include: Openvpn Openvpn.