Vulnerabilities (CVE)

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Filtered by vendor Openvpn Subscribe
Total 43 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2021-3547 1 Openvpn 1 Openvpn 2022-10-27 5.8 MEDIUM 7.4 HIGH
OpenVPN 3 Core Library version 3.6 and 3.6.1 allows a man-in-the-middle attacker to bypass the certificate authentication by issuing an unrelated server certificate using the same hostname found in the verify-x509-name option in a client configuration.
CVE-2020-36382 1 Openvpn 1 Openvpn Access Server 2022-09-20 5.0 MEDIUM 7.5 HIGH
OpenVPN Access Server 2.7.3 to 2.8.7 allows remote attackers to trigger an assert during the user authentication phase via incorrect authentication token data in an early phase of the user authentication resulting in a denial of service.
CVE-2022-0547 3 Debian, Fedoraproject, Openvpn 3 Debian Linux, Fedora, Openvpn 2022-09-09 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-2020-15078 4 Canonical, Debian, Fedoraproject and 1 more 4 Ubuntu Linux, Debian Linux, Fedora and 1 more 2022-08-05 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-2020-15077 1 Openvpn 1 Openvpn Access Server 2022-08-05 3.5 LOW 5.3 MEDIUM
OpenVPN Access Server 2.8.7 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-2022-33738 1 Openvpn 1 Openvpn Access Server 2022-07-15 5.0 MEDIUM 7.5 HIGH
OpenVPN Access Server before 2.11 uses a weak random generator used to create user session token for the web portal
CVE-2022-33737 1 Openvpn 1 Openvpn Access Server 2022-07-14 5.0 MEDIUM 7.5 HIGH
The OpenVPN Access Server installer creates a log file readable for everyone, which from version 2.10.0 and before 2.11.0 may contain a random generated admin password
CVE-2021-4234 1 Openvpn 1 Openvpn Access Server 2022-07-14 5.0 MEDIUM 7.5 HIGH
OpenVPN Access Server 2.10 and prior versions are susceptible to resending multiple packets in a response to a reset packet sent from the client which the client again does not respond to, resulting in a limited amplification attack.
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-2020-15074 1 Openvpn 1 Openvpn Access Server 2021-11-23 5.0 MEDIUM 7.5 HIGH
OpenVPN Access Server older than version 2.8.4 and version 2.9.5 generates new user authentication tokens instead of reusing exiting tokens on reconnect making it possible to circumvent the initial token expiry timestamp.
CVE-2021-3824 1 Openvpn 1 Openvpn Access Server 2021-09-29 4.3 MEDIUM 6.1 MEDIUM
OpenVPN Access Server 2.9.0 through 2.9.4 allow remote attackers to inject arbitrary web script or HTML via the web login page URL.
CVE-2021-3613 1 Openvpn 1 Connect 2021-07-09 4.4 MEDIUM 7.8 HIGH
OpenVPN Connect 3.2.0 through 3.3.0 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 (OpenVPNConnect.exe).
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-2020-15076 1 Openvpn 1 Private Tunnel 2021-06-02 7.2 HIGH 7.8 HIGH
Private Tunnel installer for macOS version 3.0.1 and older versions may corrupt system critical files it should not have access via symlinks in /tmp.
CVE-2020-15075 1 Openvpn 1 Connect 2021-04-06 3.6 LOW 7.1 HIGH
OpenVPN Connect installer for macOS version 3.2.6 and older may corrupt system critical files it should not have access via symlinks in /tmp.
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-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-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-2005-3409 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.