CVE-2017-7478

Openvpn vulnerability

CVSS

7.5

EPSS

13.9%

EPSS pct

96th

Exploited

No known

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.

Affected vendor

Openvpn

Affected product

Openvpn

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness type (CWE)

CWE-617 — Reachable Assertion
CWE-20 — Improper Input Validation

Published

2017-05-15

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 13.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2017-7478

Confirm whether Openvpn Openvpn is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2017-7478.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-7478

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-7478 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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