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CVE-2017-7478· NVD / CVE Program· CNA redhat

OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet.

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.

HighCVSS 7.5 · v3.0—Proof of concept Fix available
Published
May 15, 2017
Updated
Jun 16, 2026
EPSS
13.8% · 96th percentile
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Report tools

JSON

Action score

34

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
4 / 30 · 13.8%

Affected systems

VendorProduct
openvpnopenvpn

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • openvpn openvpn2.3.12
  • openvpn openvpn2.3.13
  • openvpn openvpn2.3.14
  • openvpn openvpn2.4.0
  • openvpn openvpn2.4.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • OpenVPN Technologies, Inc openvpn

    • 2.3.12 and neweraffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.5openvpnbefore 2.3.15-r02.3.15-r0
Alpine:v3.6openvpnbefore 2.4.2-r02.4.2-r0
Debian:12openvpnbefore 2.4.0-52.4.0-5
SUSE:Linux Enterprise Desktop 12 SP2openvpnbefore 2.3.8-16.14.12.3.8-16.14.1
SUSE:Linux Enterprise Point of Sale 11 SP3openvpnbefore 2.0.9-143.47.3.12.0.9-143.47.3.1
SUSE:Linux Enterprise Server 11-SECURITYopenvpn-openssl1before 2.3.2-0.9.12.3.2-0.9.1

Same product

openvpn: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-27903OpenVPN plug-ins on Windows with OpenVPN 2.6.9 and earlier could be loaded from any directory, which allows an attacker to load an arbitrary
    42Plan
  • CVE-2023-46850Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending net
    40Plan
  • CVE-2022-0547OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes u
    40Plan
  • CVE-2017-12166OpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow vulnerability when key-method 1 is used, possibly r
    40Plan
  • CVE-2025-10680OpenVPN 2.7_alpha1 through 2.7_beta1 on POSIX based platforms allows a remote authenticated server to inject shell commands via DNS variable
    37Monitor
  • CVE-2018-7544A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5.
    37Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
OpenVPN Technologies, Inc openvpn2.3.15 · descriptionVendor (CNA)
alpine:openvpn2.3.15-r0 · Alpine:v3.5Package registry (OSV)
debian:openvpn2.4.0-5 · Debian:12Package registry (OSV)
suse:openvpn2.3.8-16.14.1 · SUSE:Linux Enterprise Desktop 12 SP2Package registry (OSV)
suse:openvpn-openssl12.3.2-0.9.1 · SUSE:Linux Enterprise Server 11-SECURITYPackage registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrydos2017-05-11

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-5 d
  2. Published
  3. TodaySep 30, 2026+3425 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-617 · Reachable Assertion

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records