VULNERABILITY INTELLIGENCE

CVE-2019-14899

CVSS score7.4 HIGH
EPSS probability0.84%
CISA KEVNot currently listed
Published2019-12-11
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

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 classification

  • CWE-300: Channel Accessible by Non-Endpoint

Primary references