Filtered by vendor Openvpn Subscriptions
Total 52 CVE
CVE Vendors Products Updated CVSS v3.1
CVE-2022-0547 3 Debian, Fedoraproject, Openvpn 3 Debian Linux, Fedora, Openvpn 2025-04-23 9.8 Critical
OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials.
CVE-2017-7479 1 Openvpn 1 Openvpn 2025-04-20 N/A
OpenVPN versions before 2.3.15 and before 2.4.2 are vulnerable to reachable assertion when packet-ID counter rolls over resulting into Denial of Service of server by authenticated attacker.
CVE-2017-7521 1 Openvpn 1 Openvpn 2025-04-20 N/A
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service due to memory exhaustion caused by memory leaks and double-free issue in extract_x509_extension().
CVE-2017-5868 1 Openvpn 1 Openvpn Access Server 2025-04-20 N/A
CRLF injection vulnerability in the web interface in OpenVPN Access Server 2.1.4 allows remote attackers to inject arbitrary HTTP headers and consequently conduct session fixation attacks and possibly HTTP response splitting attacks via "%0A" characters in the PATH_INFO to __session_start__/.
CVE-2017-12166 2 Debian, Openvpn 2 Debian Linux, Openvpn 2025-04-20 9.8 Critical
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.
CVE-2017-7522 1 Openvpn 1 Openvpn 2025-04-20 N/A
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service by authenticated remote attacker via sending a certificate with an embedded NULL character.
CVE-2017-7508 1 Openvpn 1 Openvpn 2025-04-20 N/A
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service when receiving malformed IPv6 packet.
CVE-2017-7478 1 Openvpn 1 Openvpn 2025-04-20 N/A
OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet. Note that this issue is fixed in 2.3.15 and 2.4.2.
CVE-2016-6329 1 Openvpn 1 Openvpn 2025-04-20 N/A
OpenVPN, when using a 64-bit block cipher, makes it easier for remote attackers to obtain cleartext data via a birthday attack against a long-duration encrypted session, as demonstrated by an HTTP-over-OpenVPN session using Blowfish in CBC mode, aka a "Sweet32" attack.
CVE-2017-7520 1 Openvpn 1 Openvpn 2025-04-20 N/A
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service and/or possibly sensitive memory leak triggered by man-in-the-middle attacker.
CVE-2014-8104 5 Canonical, Debian, Mageia and 2 more 6 Ubuntu Linux, Debian Linux, Mageia and 3 more 2025-04-12 N/A
OpenVPN 2.x before 2.0.11, 2.1.x, 2.2.x before 2.2.3, and 2.3.x before 2.3.6 allows remote authenticated users to cause a denial of service (server crash) via a small control channel packet.
CVE-2014-9104 1 Openvpn 1 Openvpn Access Server 2025-04-12 N/A
Multiple cross-site request forgery (CSRF) vulnerabilities in the XML-RPC API in the Desktop Client in OpenVPN Access Server 1.5.6 and earlier allow remote attackers to hijack the authentication of administrators for requests that (1) disconnecting established VPN sessions, (2) connect to arbitrary VPN servers, or (3) create VPN profiles and execute arbitrary commands via crafted API requests.
CVE-2013-2692 1 Openvpn 1 Openvpn Access Server 2025-04-12 N/A
Cross-site request forgery (CSRF) vulnerability in the Admin web interface in OpenVPN Access Server before 1.8.5 allows remote attackers to hijack the authentication of administrators for requests that create administrative users.
CVE-2014-5455 2 Openvpn, Privatetunnel 2 Openvpn, Privatetunnel 2025-04-12 N/A
Unquoted Windows search path vulnerability in the ptservice service prior to PrivateTunnel version 3.0 (Windows) and OpenVPN Connect version 3.1 (Windows) allows local users to gain privileges via a crafted program.exe file in the %SYSTEMDRIVE% folder.
CVE-2013-2061 2 Opensuse, Openvpn 3 Opensuse, Openvpn, Openvpn Access Server 2025-04-11 N/A
The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on the CBC mode cipher.
CVE-2008-3459 1 Openvpn 1 Openvpn 2025-04-09 N/A
Unspecified vulnerability in OpenVPN 2.1-beta14 through 2.1-rc8, when running on non-Windows systems, allows remote servers to execute arbitrary commands via crafted (1) lladdr and (2) iproute configuration directives, probably related to shell metacharacters.
CVE-2006-2229 1 Openvpn 2 Openvpn, Openvpn Access Server 2025-04-03 N/A
OpenVPN 2.0.7 and earlier, when configured to use the --management option with an IP that is not 127.0.0.1, uses a cleartext password for TCP sessions to the management interface, which might allow remote attackers to view sensitive information or cause a denial of service.
CVE-2005-2534 1 Openvpn 1 Openvpn 2025-04-03 N/A
Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.
CVE-2005-3393 1 Openvpn 2 Openvpn, Openvpn Access Server 2025-04-03 N/A
Format string vulnerability in the foreign_option function in options.c for OpenVPN 2.0.x allows remote clients to execute arbitrary code via format string specifiers in a push of the dhcp-option command option.
CVE-2005-2532 1 Openvpn 1 Openvpn 2025-04-03 N/A
OpenVPN before 2.0.1 does not properly flush the OpenSSL error queue when a packet can not be decrypted by the server, which allows remote authenticated attackers to cause a denial of service (client disconnection) via a large number of packets that can not be decrypted.