CVE-2005-3409

CVE-2005-3409 is a medium-severity vulnerability in Openvpn with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

OpenVPN 2.x before 2.0.4, when running in TCP mode, allows remote attackers to cause a denial of service (segmentation fault) by forcing the accept function call to return an error status, which leads to a null dereference in an exception handler.

Frequently asked questions

What is CVE-2005-3409?
OpenVPN 2.x before 2.0.4, when running in TCP mode, allows remote attackers to cause a denial of service (segmentation fault) by forcing the accept function call to return an error status, which leads to a null dereference in an exception handler.
How severe is CVE-2005-3409?
CVE-2005-3409 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2005-3409 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-3409?
CVE-2005-3409 primarily affects Openvpn. In total, 78 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-3409?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-3409 published?
CVE-2005-3409 was published on 2005-11-02 and last updated on 2026-06-16.

References

Affected products (78)

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