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Vuln ID | Summary | CVSS Severity |
---|---|---|
CVE-2020-20813 |
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet. Published: August 22, 2023; 3:16:08 PM -0400 |
V4.0:(not available) V3.1: 7.5 HIGH V2.0:(not available) |
CVE-2022-0547 |
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. Published: March 18, 2022; 2:15:12 PM -0400 |
V4.0:(not available) V3.1: 9.8 CRITICAL V2.0: 7.5 HIGH |
CVE-2021-3606 |
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). Published: July 02, 2021; 9:15:07 AM -0400 |
V4.0:(not available) V3.1: 7.8 HIGH V2.0: 4.4 MEDIUM |
CVE-2020-15078 |
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. Published: April 26, 2021; 10:15:08 AM -0400 |
V4.0:(not available) V3.1: 7.5 HIGH V2.0: 5.0 MEDIUM |
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. Published: April 27, 2020; 11:15:12 AM -0400 |
V4.0:(not available) V3.1: 3.7 LOW V2.0: 4.3 MEDIUM |
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. Published: May 01, 2018; 2:29:00 PM -0400 |
V4.0:(not available) V3.0: 7.8 HIGH V2.0: 4.6 MEDIUM |
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 Published: March 16, 2018; 11:29:00 AM -0400 |
V4.0:(not available) V3.0: 9.1 CRITICAL V2.0: 6.4 MEDIUM |
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. Published: October 03, 2017; 9:29:02 PM -0400 |
V4.0:(not available) V3.1: 9.8 CRITICAL V2.0: 6.8 MEDIUM |
CVE-2017-7522 |
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. Published: June 27, 2017; 9:29:00 AM -0400 |
V4.0:(not available) V3.0: 6.5 MEDIUM V2.0: 4.0 MEDIUM |
CVE-2017-7521 |
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(). Published: June 27, 2017; 9:29:00 AM -0400 |
V4.0:(not available) V3.0: 5.9 MEDIUM V2.0: 4.3 MEDIUM |
CVE-2017-7520 |
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. Published: June 27, 2017; 9:29:00 AM -0400 |
V4.0:(not available) V3.0: 7.4 HIGH V2.0: 4.0 MEDIUM |
CVE-2017-7508 |
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service when receiving malformed IPv6 packet. Published: June 27, 2017; 9:29:00 AM -0400 |
V4.0:(not available) V3.0: 7.5 HIGH V2.0: 5.0 MEDIUM |
CVE-2017-7479 |
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. Published: May 15, 2017; 2:29:00 PM -0400 |
V4.0:(not available) V3.0: 6.5 MEDIUM V2.0: 4.0 MEDIUM |
CVE-2017-7478 |
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. Published: May 15, 2017; 2:29:00 PM -0400 |
V4.0:(not available) V3.0: 7.5 HIGH V2.0: 5.0 MEDIUM |