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.
CVE-2017-7479
MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence
Score 6.5 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 6.5; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 2%CVSS: 6.5Exploit: NoneExposed: 0
A fix is available — apply it.
- CVSS v3
- 6.5
- EG Score
- 6.5(medium)
- EPSS
- 76.8%
- KEV
- Not listed
Published
May 15, 2017
Last Modified
May 13, 2026
References (8)
- secalert@redhathttp://www.debian.org/security/2017/dsa-3900
- secalert@redhathttp://www.securityfocus.com/bid/98443
- secalert@redhathttp://www.securitytracker.com/id/1038473
- secalert@redhathttps://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits
- af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2017/dsa-3900
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/98443
- af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1038473
- af854a3a-2127-422b-91ae-364da2661108https://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits
Patch Availability(2)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | openvpn (2.4.0-4ubuntu1.3) @ zesty | 2026-05-22 | ubuntu |
| ubuntu | openvpn (2.4.0-4ubuntu1.2) @ zesty | 2026-05-22 | ubuntu |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Frequently asked(5)
What is CVE-2017-7479?
CVE-2017-7479 is a medium vulnerability published on May 15, 2017. 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.
When was CVE-2017-7479 disclosed?
CVE-2017-7479 was first published in the National Vulnerability Database on May 15, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-7479 actively exploited?
CVE-2017-7479 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 76.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-7479?
CVE-2017-7479 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2017-7479?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-7479, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2017-7479
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