CVE ID:	CVE-2019-14899
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.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2019-14899 20200717 APPLE-SA-2020-07-15-1 iOS 13.6 and iPadOS 13.6 http://seclists.org/fulldisclosure/2020/Jul/23 20200717 APPLE-SA-2020-07-15-2 macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra http://seclists.org/fulldisclosure/2020/Jul/24 20200717 APPLE-SA-2020-07-15-3 tvOS 13.4.8 http://seclists.org/fulldisclosure/2020/Jul/25 20201115 APPLE-SA-2020-11-13-3 Additional information for APPLE-SA-2020-09-16-1 iOS 14.0 and iPadOS 14.0 http://seclists.org/fulldisclosure/2020/Nov/20 20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1 http://seclists.org/fulldisclosure/2020/Dec/32 [oss-security] 20200813 Blind in/on-path attacks against VPN-tunneled connections (CVE-2019-14899 follow-up) http://www.openwall.com/lists/oss-security/2020/08/13/2 [oss-security] 20201007 Re: [CVE-2019-14899] Inferring and hijacking VPN-tunneled TCP connections. http://www.openwall.com/lists/oss-security/2020/10/07/3 [oss-security] 20210704 Re: Blind in/on-path attacks against VPN-tunneled connections (CVE-2019-14899 follow-up) http://www.openwall.com/lists/oss-security/2021/07/05/1 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899 https://openvpn.net/security-advisory/no-flaws-found-in-openvpn-software/ https://openvpn.net/security-advisory/no-flaws-found-in-openvpn-software/ https://support.apple.com/kb/HT211288 https://support.apple.com/kb/HT211288 https://support.apple.com/kb/HT211289 https://support.apple.com/kb/HT211289 https://support.apple.com/kb/HT211290 https://support.apple.com/kb/HT211290 https://support.apple.com/kb/HT211850 https://support.apple.com/kb/HT211850 https://support.apple.com/kb/HT211931 https://support.apple.com/kb/HT211931