CVE-2019-14899

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.

• CWE-300

• http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2020/Jul/23Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2020/Jul/24Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2020/Jul/25Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2020/Nov/20Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2020/08/13/2Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2020/10/07/3Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/07/05/1Mailing List, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899Issue Tracking, Third Party Advisory
• https://openvpn.net/security-advisory/no-flaws-found-in-openvpn-software/Third Party Advisory
• https://support.apple.com/kb/HT211288Third Party Advisory
• https://support.apple.com/kb/HT211289Third Party Advisory
• https://support.apple.com/kb/HT211290Third Party Advisory
• https://support.apple.com/kb/HT211850Third Party Advisory
• https://support.apple.com/kb/HT211931Third Party Advisory
• http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2020/Jul/23Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2020/Jul/24Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2020/Jul/25Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2020/Nov/20Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2020/08/13/2Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2020/10/07/3Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/07/05/1Mailing List, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899Issue Tracking, Third Party Advisory
• https://openvpn.net/security-advisory/no-flaws-found-in-openvpn-software/Third Party Advisory
• https://support.apple.com/kb/HT211288Third Party Advisory
• https://support.apple.com/kb/HT211289Third Party Advisory
• https://support.apple.com/kb/HT211290Third Party Advisory
• https://support.apple.com/kb/HT211850Third Party Advisory
• https://support.apple.com/kb/HT211931Third Party Advisory

Published

Dec 11, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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