openvpn: Multiple security issues fixed in OpenVPN 2.4.3 and 2.3.17
Published Jun 27, 2017
7.5
HIGHCVSS 3.0
EPSS 3.38%
Description
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service and/or possibly sensitive memory leak triggered by man-in-the-middle attacker.
Affected products
-
- Version before 2.3.17StatusaffectedConstraints-
- Version before 2.4.3StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OpenVPN Technologies, Inc | OpenVPN | n/a |
|
- ≤ 2.3.16
- 2.4.0
- 2.4.0
- 2.4.0
- 2.4.0
- 2.4.0
- 2.4.0
- 2.4.1
- 2.4.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect Red Hat Enterprise Linux 5, 6 and 7 as OpenVPN is not included in any of Red Hat's supported products.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:H/Au:N/C:P/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.38% (0.03380) | 88.38th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.38% (0.03380) | 87.18th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.50% (0.00500) | 76.56th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.50% (0.00500) | 75.64th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.50% (0.00500) | 72.66th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v1 |
| Jan 6, 2022 | 1.04% (0.01040) | 27.69th | v1 |
| Sep 1, 2021 | 1.04% (0.01040) | 64.49th | v1 |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (9)
- http://www.debian.org/security/2017/dsa-3900 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/99230 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038768 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2017-7520 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1463642 Issue Tracking
- https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243 x_refsource_CONFIRMVendor Advisory
- https://guidovranken.wordpress.com/2017/06/21/the-openvpn-post-audit-bug-bonanza/
- https://nvd.nist.gov/vuln/detail/CVE-2017-7520
- https://www.cve.org/CVERecord?id=CVE-2017-7520
| Link | Providers | Tags |
|---|---|---|
| http://www.debian.org/security/2017/dsa-3900 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securityfocus.com/bid/99230 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1038768 | vdb-entryx_refsource_SECTRACK | |
| https://access.redhat.com/security/cve/CVE-2017-7520 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1463642 | Issue Tracking | |
| https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243 | x_refsource_CONFIRMVendor Advisory | |
| https://guidovranken.wordpress.com/2017/06/21/the-openvpn-post-audit-bug-bonanza/ | ||
| https://nvd.nist.gov/vuln/detail/CVE-2017-7520 | ||
| https://www.cve.org/CVERecord?id=CVE-2017-7520 |
Change history (0)
No recorded changes yet.