UpHeron
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Servers and applications

CVE-2017-7478

OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet. Note that this issue is fixed in 2.3.15 and 2.4.2.

Severity
High 7.5
Published
15 May 2017
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
14% in the next 30 daysHigher than 96% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
CWE-617Improper input validation (CWE-20)
Attack
Over the network · No login needed · No user action needed
Attacker can
Take it down
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Sources
NVD

Affected software

SoftwareAffected versions
OpenVPNServers and applications · cpe:a:openvpn:openvpn
  • Version 2.4.1
  • Version 2.4.0
  • Version 2.4.0-rc2
  • Version 2.4.0-rc1
All 10 release lines
  • Version 2.3.12
  • Version 2.3.13
  • Version 2.3.14
  • Version 2.4.0-alpha2
  • Version 2.4.0-beta1
  • Version 2.4.0-beta2
  • Version 2.4.0-rc1
  • Version 2.4.0-rc2
  • Version 2.4.0
  • Version 2.4.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-7478
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-7478