CVE-2019-14899
HIGHDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Exploit Intelligence
Moderate risk: more likely to be exploited than 54% of all known CVEs.
References
Related Vulnerabilities
Other CWE-300 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2009-3555 | Critical | 9.8 | 87% | - | Fix |
| CVE-2017-12150 | High | 7.4 | 13% | - | Fix |
| CVE-2017-12151 | High | 7.4 | 4.6% | - | Fix |
| CVE-2021-22890 | Low | 3.7 | 3.1% | - | Fix |
| CVE-2020-10749 | Medium | 6.0 | 2.4% | - | Fix |
| CVE-2017-7480 | Critical | 9.8 | 2.3% | - | Fix |
Common questions
How do I fix CVE-2019-14899?
Published advisories record a fix for 4 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2019-14899 being actively exploited?
Not that we know of. CVE-2019-14899 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.84% is the estimated probability that it will be exploited in the next 30 days. That is higher than 54% of all scored CVEs.
How severe is CVE-2019-14899?
CVE-2019-14899 has a CVSS v3 base score of 7.4, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2019-14899 affect?
Published advisories record a fix for ipados (NVD), iphone os (NVD), mac os x (NVD), tvos (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2019-14899
Markdown
[](https://tridentstack.com/cve/CVE-2019-14899)HTML
<a href="https://tridentstack.com/cve/CVE-2019-14899"><img src="https://tridentstack.com/cve/badge/CVE-2019-14899.svg" alt="CVE-2019-14899"></a>Find and fix vulnerabilities across your fleet
TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.