UpHeron
All vulnerabilities

Servers and applications

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.

Severity
Medium 5.0
Published
2 Nov 2005
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
2.5% in the next 30 daysHigher than 84% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
OpenVPNServers and applications · cpe:a:openvpn:openvpn
  • Version 2.0.3_rc1
  • Version 2.0.2_rc1
  • Version 2.0.1_rc7
  • Version 2.0.1_rc6
All 76 release lines
  • Version 2.0_beta1
  • Version 2.0_beta2
  • Version 2.0_beta3
  • Version 2.0_beta4
  • Version 2.0_beta5
  • Version 2.0_beta6
  • Version 2.0_beta7
  • Version 2.0_beta8
  • Version 2.0_beta9
  • Version 2.0_beta10
  • Version 2.0_beta11
  • Version 2.0_beta12
  • Version 2.0_beta13
  • Version 2.0_beta15
  • Version 2.0_beta16
  • Version 2.0_beta17
  • Version 2.0_beta18
  • Version 2.0_beta19
  • Version 2.0_beta20
  • Version 2.0_beta28
  • Version 2.0_rc1
  • Version 2.0_rc2
  • Version 2.0_rc3
  • Version 2.0_rc4
  • Version 2.0_rc5
  • Version 2.0_rc6
  • Version 2.0_rc7
  • Version 2.0_rc8
  • Version 2.0_rc9
  • Version 2.0_rc10
  • Version 2.0_rc11
  • Version 2.0_rc12
  • Version 2.0_rc13
  • Version 2.0_rc14
  • Version 2.0_rc15
  • Version 2.0_rc16
  • Version 2.0_rc17
  • Version 2.0_rc18
  • Version 2.0_rc19
  • Version 2.0_rc20
  • Version 2.0_rc21
  • Version 2.0
  • Version 2.0_test1
  • Version 2.0_test2
  • Version 2.0_test3
  • Version 2.0_test5
  • Version 2.0_test6
  • Version 2.0_test7
  • Version 2.0_test8
  • Version 2.0_test9
  • Version 2.0_test10
  • Version 2.0_test11
  • Version 2.0_test12
  • Version 2.0_test14
  • Version 2.0_test15
  • Version 2.0_test16
  • Version 2.0_test17
  • Version 2.0_test18
  • Version 2.0_test19
  • Version 2.0_test20
  • Version 2.0_test21
  • Version 2.0_test22
  • Version 2.0_test23
  • Version 2.0_test24
  • Version 2.0_test26
  • Version 2.0_test27
  • Version 2.0_test29
  • Version 2.0.1_rc1
  • Version 2.0.1_rc2
  • Version 2.0.1_rc3
  • Version 2.0.1_rc4
  • Version 2.0.1_rc5
  • Version 2.0.1_rc6
  • Version 2.0.1_rc7
  • Version 2.0.2_rc1
  • Version 2.0.3_rc1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2005-3409
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2005-3409