A vulnerability was discovered in Linux, FreeBSD, OpenBSD, MacOS, iOS, and Android that…
Priority LOW 34CWE-300Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A vulnerability was discovered in Linux, FreeBSD, OpenBSD, MacOS, iOS, and Android that allows a malicious access point, or an adjacent user, to determine if a connected user is using a VPN, make positive inferences about the websites they are visiting, and determine the correct sequence and acknowledgement numbers in use, allowing the bad actor to inject data into the TCP stream. This provides everything that is needed for an attacker to hijack active connections inside the VPN tunnel.
Why it matters now
EPSS 0.00838 58th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | VPN | all versions | — | No fix listed | CNA |
- VPN VendorRed Hat Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:freebsd:freebsd:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | FreeBSD |
| cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Linux |
| cpe:2.3:o:openbsd:openbsd:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | OpenBSD |
| cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* | before 13.6 | Vulnerable | Apple |
| cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* | before 13.6 | Vulnerable | Apple |
| cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* | before 10.15.6 | Vulnerable | Apple |
| cpe:2.3:o:apple:macos:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | Apple |
| cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* | before 13.4.8 | Vulnerable | Apple |
- cpe:2.3:o:freebsd:freebsd:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·FreeBSD
- cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Linux
- cpe:2.3:o:openbsd:openbsd:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·OpenBSD
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 13.6 Vulnerable ·Apple
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 13.6 Vulnerable ·Apple
- cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions before 10.15.6 Vulnerable ·Apple
- cpe:2.3:o:apple:macos:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Apple
- cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 13.4.8 Vulnerable ·Apple
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2019-14899
- 2026-10-03 Alias added: GHSA-rwr5-xr2c-7wc8
References
Advisory 15
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899
- https://openvpn.net/security-advisory/no-flaws-found-in-openvpn-software/
- https://support.apple.com/kb/HT211288
- https://support.apple.com/kb/HT211290
- https://support.apple.com/kb/HT211289
- 20200717 APPLE-SA-2020-07-15-3 tvOS 13.4.8
- 20200717 APPLE-SA-2020-07-15-2 macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra
- 20200717 APPLE-SA-2020-07-15-1 iOS 13.6 and iPadOS 13.6
- [oss-security] 20200813 Blind in/on-path attacks against VPN-tunneled connections (CVE-2019-14899 follow-up)
- https://support.apple.com/kb/HT211850
- [oss-security] 20201007 Re: [CVE-2019-14899] Inferring and hijacking VPN-tunneled TCP connections.
- https://support.apple.com/kb/HT211931
- 20201115 APPLE-SA-2020-11-13-3 Additional information for APPLE-SA-2020-09-16-1 iOS 14.0 and iPadOS 14.0
- 20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1
- [oss-security] 20210704 Re: Blind in/on-path attacks against VPN-tunneled connections (CVE-2019-14899 follow-up)
More Red Hat vulnerabilities
- TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
- TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
- TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
- TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
- TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
- TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2019-14899 · CVE Program
- CVE-2019-14899 · NVD
- FIRST EPSS
- GHSA-rwr5-xr2c-7wc8 · GitHub Advisory Database · CC BY 4.0
- CVE-2019-14899 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences