CVE-2005-2531 - CVE House
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Status published Medium CVE-2005-2531

OpenVPN before 2.0.1, when running with "verb 0" and without...

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

openvpn
Vulnerable Versions:
2.0, 2.0.1_rc1, 2.0.1_rc2, 2.0.1_rc3, 2.0.1_rc4, 2.0.1_rc5, 2.0.1_rc6, 2.0.1_rc7, 2.0_beta1, 2.0_beta2, 2.0_beta3, 2.0_beta4, 2.0_beta5, 2.0_beta6, 2.0_beta7, 2.0_beta8, 2.0_beta9, 2.0_beta10, 2.0_beta11, 2.0_beta12, 2.0_beta13, 2.0_beta15, 2.0_beta16, 2.0_beta17, 2.0_beta18, 2.0_beta19, 2.0_beta20, 2.0_beta28, 2.0_rc1, 2.0_rc2, 2.0_rc3, 2.0_rc4, 2.0_rc5, 2.0_rc6, 2.0_rc7, 2.0_rc8, 2.0_rc9, 2.0_rc10, 2.0_rc11, 2.0_rc12, 2.0_rc13, 2.0_rc14, 2.0_rc15, 2.0_rc16, 2.0_rc17, 2.0_rc18, 2.0_rc19, 2.0_rc20, 2.0_rc21, 2.0_test1, 2.0_test2, 2.0_test3, 2.0_test5, 2.0_test6, 2.0_test7, 2.0_test8, 2.0_test9, 2.0_test10, 2.0_test11, 2.0_test12, 2.0_test14, 2.0_test15, 2.0_test16, 2.0_test17, 2.0_test18, 2.0_test19, 2.0_test20, 2.0_test21, 2.0_test22, 2.0_test23, 2.0_test24, 2.0_test26, 2.0_test27, 2.0_test29

Timeline

Official Publish: August 24th, 2005
Last Modified: August 7th, 2024
Added to House: July 18th, 2026

CVSS Vectors

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.