CVE-2005-2531

Summary

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.

Affected Software

Weaknesses

• n/a

ADP Enrichment

CVE Program Container

Additional References

• http://www.securityfocus.com/bid/14605
• http://secunia.com/advisories/17103
• http://openvpn.net/changelog.html
• http://www.mandriva.com/security/advisories?name=MDKSA-2005:145
• http://www.novell.com/linux/security/advisories/2005_20_sr.html
• http://www.debian.org/security/2005/dsa-851
• http://secunia.com/advisories/16463

References

• http://www.securityfocus.com/bid/14605
• http://secunia.com/advisories/17103
• http://openvpn.net/changelog.html
• http://www.mandriva.com/security/advisories?name=MDKSA-2005:145
• http://www.novell.com/linux/security/advisories/2005_20_sr.html
• http://www.debian.org/security/2005/dsa-851
• http://secunia.com/advisories/16463

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