CVE-2019-14899 Other in VPN
Adjacent attackers can hijack active VPN connections by injecting data into the TCP stream, affecting major operating systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2019-14899?
CVE-2019-14899 is a high-severity vulnerability in Apple Ipados, published on 11 Dec 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-300
Which versions are affected by CVE-2019-14899?
It affects 8 products.
Products include Apple Ipados, Apple Iphone Os, Apple Mac Os X, Apple Macos, Apple Tvos, Freebsd Freebsd and 2 more.
How do I fix CVE-2019-14899?
Apply the vendor's patch.
Is CVE-2019-14899 being exploited?
There is no known exploitation of CVE-2019-14899 in the wild and no public exploit code.
Other vulnerabilities in Apple Ipados
- CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write
- CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write
- CVE-2025-24085 Apple Multiple Products Use-After-Free
- CVE-2025-31200 Apple Multiple Products Memory Corruption
- CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write
Sources
Also known as GHSA-rwr5-xr2c-7wc8, ROOT-OS-UBUNTU-2204-CVE-2019-14899, ROOT-OS-UBUNTU-2404-CVE-2019-14899, UBUNTU-CVE-2019-14899.