Vulnerability Report

CVE-2005-3409

Title: OpenVPN TCP mode accept() error leads to crash/DoS

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2005-3409.

CWE Category NVD-CWE-noinfo

Published Date Nov 02, 2005

Modified Date Jun 16, 2026

Exploit Status Not Found

Score 5.0 CVSS v2.0

Exploit Probability (EPSS)

2.49%

Vulnerability Summary

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.

Impacted Vendors

openvpn 2

aviatrix 1

Reference Links

http://openvpn.net/changelog.html http://secunia.com/advisories/17376 http://secunia.com/advisories/17447 http://secunia.com/advisories/17452 http://secunia.com/advisories/17480 http://www.debian.org/security/2005/dsa-885 http://www.gentoo.org/security/en/glsa/glsa-200511-07.xml http://www.novell.com/linux/security/advisories/2005_25_sr.html http://www.osvdb.org/20416 http://www.securityfocus.com/archive/1/415487 http://www.securityfocus.com/bid/15270 http://openvpn.net/changelog.html http://secunia.com/advisories/17376 http://secunia.com/advisories/17447 http://secunia.com/advisories/17452 http://secunia.com/advisories/17480 http://www.debian.org/security/2005/dsa-885 http://www.gentoo.org/security/en/glsa/glsa-200511-07.xml http://www.novell.com/linux/security/advisories/2005_25_sr.html http://www.osvdb.org/20416 http://www.securityfocus.com/archive/1/415487 http://www.securityfocus.com/bid/15270

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

5.0

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2005-3409 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 03, 2025 MODIFIED

Vulnerability data or affected products updated.

November 02, 2005 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


                                    AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected Stack

No specific products linked.