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Total
29 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2023-46849 | 3 Debian, Fedoraproject, Openvpn | 4 Debian Linux, Fedora, Openvpn and 1 more | 2023-11-29 | N/A | 7.5 HIGH |
| Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service. | |||||
| CVE-2023-46850 | 3 Debian, Fedoraproject, Openvpn | 4 Debian Linux, Fedora, Openvpn and 1 more | 2023-11-29 | N/A | 9.8 CRITICAL |
| Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer. | |||||
| CVE-2020-20813 | 1 Openvpn | 1 Openvpn | 2023-08-25 | N/A | 7.5 HIGH |
| Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet. | |||||
| CVE-2020-15078 | 4 Canonical, Debian, Fedoraproject and 1 more | 4 Ubuntu Linux, Debian Linux, Fedora and 1 more | 2022-05-12 | 5.0 MEDIUM | 7.5 HIGH |
| OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks. | |||||
| CVE-2020-11810 | 3 Debian, Fedoraproject, Openvpn | 3 Debian Linux, Fedora, Openvpn | 2022-05-12 | 4.3 MEDIUM | 3.7 LOW |
| 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. | |||||
| CVE-2017-12166 | 2 Debian, Openvpn | 2 Debian Linux, Openvpn | 2022-05-12 | 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-2022-0547 | 2 Fedoraproject, Openvpn | 2 Fedora, Openvpn | 2022-05-03 | 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-2021-3606 | 2 Microsoft, Openvpn | 2 Windows, Openvpn | 2021-07-09 | 4.4 MEDIUM | 7.8 HIGH |
| OpenVPN before version 2.5.3 on Windows allows local users to load arbitrary dynamic loadable libraries via an OpenSSL configuration file if present, which allows the user to run arbitrary code with the same privilege level as the main OpenVPN process (openvpn.exe). | |||||
| CVE-2014-5455 | 2 Openvpn, Privatetunnel | 2 Openvpn, Privatetunnel | 2020-06-01 | 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 | 2020-05-12 | 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-2005-3409 | 1 Openvpn | 2 Openvpn, Openvpn Access Server | 2020-05-12 | 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-2014-8104 | 5 Canonical, Debian, Mageia and 2 more | 6 Ubuntu Linux, Debian Linux, Mageia and 3 more | 2020-05-12 | 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-2005-3393 | 1 Openvpn | 2 Openvpn, Openvpn Access Server | 2020-05-12 | 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-2006-2229 | 1 Openvpn | 2 Openvpn, Openvpn Access Server | 2020-05-12 | 4.0 MEDIUM | 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-2006-1629 | 1 Openvpn | 2 Openvpn, Openvpn Access Server | 2020-05-12 | 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-2017-7479 | 1 Openvpn | 1 Openvpn | 2019-10-03 | 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-2017-7508 | 1 Openvpn | 1 Openvpn | 2019-10-03 | 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-2017-7520 | 1 Openvpn | 1 Openvpn | 2019-10-03 | 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-2017-7521 | 1 Openvpn | 1 Openvpn | 2019-10-03 | 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-2016-6329 | 1 Openvpn | 1 Openvpn | 2019-07-09 | 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-2018-9336 | 2 Openvpn, Slackware | 2 Openvpn, Slackware Linux | 2018-06-13 | 4.6 MEDIUM | 7.8 HIGH |
| 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. | |||||
| CVE-2018-7544 | 1 Openvpn | 1 Openvpn | 2018-04-10 | 6.4 MEDIUM | 9.1 CRITICAL |
| ** DISPUTED ** 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. | |||||
| CVE-2017-7478 | 1 Openvpn | 1 Openvpn | 2017-08-16 | 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-2008-3459 | 1 Openvpn | 1 Openvpn | 2017-08-08 | 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-2017-7522 | 1 Openvpn | 1 Openvpn | 2017-07-07 | 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-2005-2531 | 1 Openvpn | 1 Openvpn | 2008-09-05 | 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-2005-2534 | 1 Openvpn | 1 Openvpn | 2008-09-05 | 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. | |||||
| CVE-2005-2533 | 1 Openvpn | 1 Openvpn | 2008-09-05 | 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 | 2008-09-05 | 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. | |||||