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Fencer Vulns
medium 6.5

CVE-2017-7479 json

OpenVPN versions before 2.3.15 and before 2.4.2 are vulnerable to reachable assertion when packet-ID counter rolls over resulting into Deni…

published 2017-05-15 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-16500

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

OpenVPN versions before 2.3.15 and before 2.4.2 are vulnerable to reachable assertion when packet-ID counter rolls over resulting into Denial of Service of server by authenticated attacker.

Patch / fix

  • openvpn Debian 14, Debian 13, Debian 12 2.4.0-5

debian advisories DEBIAN-CVE-2017-7479

  • openvpn Ubuntu 14.04 LTS 2.3.2-7ubuntu3.2
  • openvpn Ubuntu 16.04 LTS 2.3.10-1ubuntu2.1

ubuntu advisories UBUNTU-CVE-2017-7479

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openvpn SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 2.0.9-143.47.3.1
  • openvpn-openssl1 SLES 11-SECURITY 2.3.2-0.9.1
  • openvpn SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 2.3.8-16.14.1

suse advisories SUSE-SU-2017:2838-1SUSE-SU-2017:1718-1SUSE-SU-2017:1622-1

  • openvpn Alpine 3.5 2.3.15-r0
  • openvpn Alpine 3.6 2.4.2-r0

alpine advisories ALPINE-CVE-2017-7479

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openvpn Arch Linux 2.4.2-1

arch linux advisories AVG-271

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-7479 updated cvss 5.3

openvpn: DoS due to exhaustion of packet-ID counter

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.85% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Affected products

  • OpenVPN Technologies, Inc openvpn

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.