CVE-2019-14899 Information

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.

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Reference

http://seclists.org/fulldisclosure/2020/Jul/23 http://seclists.org/fulldisclosure/2020/Jul/24 http://seclists.org/fulldisclosure/2020/Jul/25 http://www.openwall.com/lists/oss-security/2020/08/13/2 http://www.openwall.com/lists/oss-security/2020/10/07/3 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/HT211289 https://support.apple.com/kb/HT211290 https://support.apple.com/kb/HT211931

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.4