Total
33 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2022-0547 | 3 Debian, Fedoraproject, Openvpn | 3 Debian Linux, Fedora, Openvpn | 2025-04-23 | 7.5 HIGH | 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-2017-7521 | 1 Openvpn | 1 Openvpn | 2025-04-20 | 4.3 MEDIUM | 5.9 MEDIUM |
| 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-2017-7478 | 1 Openvpn | 1 Openvpn | 2025-04-20 | 5.0 MEDIUM | 7.5 HIGH |
| 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-2017-7520 | 1 Openvpn | 1 Openvpn | 2025-04-20 | 4.0 MEDIUM | 7.4 HIGH |
| 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-2017-7508 | 1 Openvpn | 1 Openvpn | 2025-04-20 | 5.0 MEDIUM | 7.5 HIGH |
| OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service when receiving malformed IPv6 packet. | |||||
| CVE-2017-7479 | 1 Openvpn | 1 Openvpn | 2025-04-20 | 4.0 MEDIUM | 6.5 MEDIUM |
| 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-2017-7522 | 1 Openvpn | 1 Openvpn | 2025-04-20 | 4.0 MEDIUM | 6.5 MEDIUM |
| 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-2016-6329 | 1 Openvpn | 1 Openvpn | 2025-04-20 | 4.3 MEDIUM | 5.9 MEDIUM |
| 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-2017-12166 | 2 Debian, Openvpn | 2 Debian Linux, Openvpn | 2025-04-20 | 6.8 MEDIUM | 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-2014-8104 | 5 Canonical, Debian, Mageia and 2 more | 6 Ubuntu Linux, Debian Linux, Mageia and 3 more | 2025-04-12 | 6.8 MEDIUM | 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-2014-5455 | 2 Openvpn, Privatetunnel | 2 Openvpn, Privatetunnel | 2025-04-12 | 6.9 MEDIUM | 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 | 2.6 LOW | 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 | 7.6 HIGH | 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-2005-3409 | 1 Openvpn | 2 Openvpn, Openvpn Access Server | 2025-04-03 | 5.0 MEDIUM | N/A |
| OpenVPN 2.x before 2.0.4, when running in TCP mode, allows remote attackers to cause a denial of service (segmentation fault) by forcing the accept function call to return an error status, which leads to a null dereference in an exception handler. | |||||
| CVE-2005-2531 | 1 Openvpn | 1 Openvpn | 2025-04-03 | 5.0 MEDIUM | N/A |
| OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers to cause a denial of service (client disconnection) via a large number of failed authentication attempts. | |||||
| CVE-2005-2533 | 1 Openvpn | 1 Openvpn | 2025-04-03 | 2.1 LOW | N/A |
| OpenVPN before 2.0.1, when running in "dev tap" Ethernet bridging mode, allows remote authenticated clients to cause a denial of service (memory exhaustion) via a flood of packets with a large number of spoofed MAC addresses. | |||||
| CVE-2005-2532 | 1 Openvpn | 1 Openvpn | 2025-04-03 | 5.0 MEDIUM | 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. | |||||
| CVE-2006-1629 | 1 Openvpn | 2 Openvpn, Openvpn Access Server | 2025-04-03 | 9.0 HIGH | N/A |
| OpenVPN 2.0 through 2.0.5 allows remote malicious servers to execute arbitrary code on the client by using setenv with the LD_PRELOAD environment variable. | |||||
| CVE-2005-3393 | 1 Openvpn | 2 Openvpn, Openvpn Access Server | 2025-04-03 | 7.5 HIGH | 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-2005-2534 | 1 Openvpn | 1 Openvpn | 2025-04-03 | 2.6 LOW | 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. | |||||