Vulnerability in Openvpn
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 allows remote attackers to cause a denial of service (client disconnection) via a large number of failed authentication attempts.
EPSS: 0.020 (78.3th percentile) — read the EPSS interpretation.
Affected products
- Openvpn — versions 2.0, 2.0.1_rc1, 2.0.1_rc2
- N/a — versions n/a
Public proof-of-concept exploits
References
- cve@mitre.org (vdb-entry, x_refsource_BID)
- cve@mitre.org (x_refsource_SECUNIA, third-party-advisory)
- cve@mitre.org (x_refsource_CONFIRM)
- cve@mitre.org (vendor-advisory, Patch, x_refsource_MANDRIVA, Vendor Advisory)
- cve@mitre.org (vendor-advisory, x_refsource_SUSE)
- cve@mitre.org (vendor-advisory, x_refsource_DEBIAN)
- cve@mitre.org (x_refsource_SECUNIA, third-party-advisory)
Frequently asked questions
- What is CVE-2005-2531?
- CVE-2005-2531 is a vulnerability in Openvpn. Published 2005-08-24.
- Is CVE-2005-2531 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.