CVSS: 4.3EPSS: 0%CPEs: 6EXPL: 1CVE-2020-11810
https://notcve.org/view.php?id=CVE-2020-11810
An issue was discovered in OpenVPN 2.4.x before 2.4.9. An attacker can inject a data channel v2 (P_DATA_V2) packet using a victim's peer-id. Normally such packets are dropped, but if this packet arrives before the data channel crypto parameters have been initialized, the victim's connection will be dropped. This requires careful timing due to the small time window (usually within a few seconds) between the victim client connection starting and the server PUSH_REPLY response back to the client. This attack will only work if Negotiable Cipher Parameters (NCP) is in use. • https://bugzilla.suse.com/show_bug.cgi?id=1169925 https://community.openvpn.net/openvpn/ticket/1272 https://github.com/OpenVPN/openvpn/commit/37bc691e7d26ea4eb61a8a434ebd7a9ae76225ab https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FGHHV4YZANZW45KZTJJGVGPFMSXYRCKZ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JII7RYYYRBPQNEGGVSOXCM7JUZ43T3VH https://patchwork.openvpn.net/patch/ • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 9.8EPSS: 0%CPEs: 1EXPL: 0CVE-2020-8953
https://notcve.org/view.php?id=CVE-2020-8953
OpenVPN Access Server 2.8.x before 2.8.1 allows LDAP authentication bypass (except when a user is enrolled in two-factor authentication). OpenVPN Access Server versiones 2.8.x anteriores a 2.8.1, permite una omisión de autenticación LDAP (excepto cuando un usuario está inscrito en autenticación de dos factores). • https://openvpn.net/security-advisories • CWE-287: Improper Authentication •
CVSS: 7.8EPSS: 0%CPEs: 6EXPL: 1CVE-2018-9336
https://notcve.org/view.php?id=CVE-2018-9336
openvpnserv.exe (aka the interactive service helper) in OpenVPN 2.4.x before 2.4.6 allows a local attacker to cause a double-free of memory by sending a malformed request to the interactive service. This could cause a denial-of-service through memory corruption or possibly have unspecified other impact including privilege escalation. openvpnserv.exe (también conocido como interactive service helper) en OpenVPN en versiones 2.4.x anteriores a la 2.4.6 permite que un atacante local provoque una doble liberación (double free) de memoria enviando una petición mal formada al servicio interactivo. Esto podría provocar una denegación de servicio (DoS) al corromper la memoria o, posiblemente, otro impacto no especificado, incluyendo el escalado de privilegios. • http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761 https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24 https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6 https://www.tenable.com/security/research/tra-2018-09 • CWE-415: Double Free •
CVSS: 9.1EPSS: 0%CPEs: 1EXPL: 1CVE-2018-7544
https://notcve.org/view.php?id=CVE-2018-7544
A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a "signal SIGTERM" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning ** EN DISPUTA ** Se ha descubierto un problema en la interfaz de gestión en OpenVPN hasta la versión 2.4.5. • http://blog.0xlabs.com/2018/03/openvpn-remote-information-disclosure.html • CWE-134: Use of Externally-Controlled Format String •
CVSS: 9.8EPSS: 0%CPEs: 3EXPL: 0CVE-2017-12166
https://notcve.org/view.php?id=CVE-2017-12166
OpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow vulnerability when key-method 1 is used, possibly resulting in code execution. OpenVPN en versiones anteriores a la 2.3.3 y en versiones 2.4.x anteriores a la 2.4.4 es vulnerable a undesbordamiento de búfer cuando se utiliza key-method 1, lo que puede provocar la ejecución de código. • http://www.securityfocus.com/bid/101153 http://www.securitytracker.com/id/1039470 https://community.openvpn.net/openvpn/wiki/CVE-2017-12166 https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html • CWE-787: Out-of-bounds Write •