CVE-2005-2534

Severity: low (CVSS 2.6 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2005-08-24 · updated 2026-06-16

Description

Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.

Affected products

OpenVPN: 2.0, 2.0.1_rc1, 2.0.1_rc2, 2.0.1_rc3, 2.0.1_rc4, 2.0.1_rc5 (+68)

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-2005:145
http://www.securityfocus.com/bid/14610
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-2005:145
http://www.securityfocus.com/bid/14610

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