OpenVPN Open source VPN

OpenVPN Connect version 3.0 through 3.4.6 on macOS

CVE-2023-7224 7.8 - High - January 08, 2024

OpenVPN Connect version 3.0 through 3.4.6 on macOS allows local users to execute code in external third party libraries using the DYLD_INSERT_LIBRARIES environment variable

Code Injection

Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6

CVE-2023-46849 7.5 - High - November 11, 2023

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.

Divide By Zero

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir

CVE-2023-46850 9.8 - Critical - November 11, 2023

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.

Dangling pointer

OpenVPN Connect versions before 3.4.0.4506 (macOS) and OpenVPN Connect before 3.4.0.3100 (Windows)

CVE-2022-3761 5.9 - Medium - October 17, 2023

OpenVPN Connect versions before 3.4.0.4506 (macOS) and OpenVPN Connect before 3.4.0.3100 (Windows) allows man-in-the-middle attackers to intercept configuration profile download requests which contains the users credentials

Improper Certificate Validation

Control Channel in OpenVPN 2.4.7 and earlier

CVE-2020-20813 7.5 - High - August 22, 2023

Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.

OpenVPN Access Server 2.10 and prior versions are susceptible to resending multiple packets in a response to a reset packet sent

CVE-2021-4234 7.5 - High - July 06, 2022

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.

The OpenVPN Access Server installer creates a log file readable for everyone, which

CVE-2022-33737 7.5 - High - July 06, 2022

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

Insertion of Sensitive Information into Log File

OpenVPN Access Server before 2.11 uses a weak random generator used to create user session token for the web portal

CVE-2022-33738 7.5 - High - July 06, 2022

OpenVPN Access Server before 2.11 uses a weak random generator used to create user session token for the web portal

PRNG

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

CVE-2022-0547 9.8 - Critical - March 18, 2022

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.

authentification

OpenVPN Access Server 2.9.0 through 2.9.4

CVE-2021-3824 6.1 - Medium - September 23, 2021

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.

XSS

OpenVPN 3 Core Library version 3.6 and 3.6.1

CVE-2021-3547 7.4 - High - July 12, 2021

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.

Improper Certificate Validation

OpenVPN Connect 3.2.0 through 3.3.0

CVE-2021-3613 7.8 - High - July 02, 2021

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).

DLL preloading

OpenVPN Access Server 2.8.7 and earlier versions

CVE-2020-15077 5.3 - Medium - June 04, 2021

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.

authentification

OpenVPN Access Server 2.7.3 to 2.8.7

CVE-2020-36382 7.5 - High - June 04, 2021

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.

assertion failure

Private Tunnel installer for macOS version 3.0.1 and older versions may corrupt system critical files it should not have access

CVE-2020-15076 7.8 - High - May 26, 2021

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.

insecure temporary file

OpenVPN 2.5.1 and earlier versions

CVE-2020-15078 7.5 - High - April 26, 2021

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.

Missing Authentication for Critical Function

OpenVPN Connect installer for macOS version 3.2.6 and older may corrupt system critical files it should not have access

CVE-2020-15075 7.1 - High - March 30, 2021

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.

insecure temporary file

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-2020-15074 7.5 - High - July 14, 2020

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.

Insufficient Session Expiration

An issue was discovered in OpenVPN Access Server before 2.7.0 and 2.8.x before 2.8.3

CVE-2020-11462 7.5 - High - May 04, 2020

An issue was discovered in OpenVPN Access Server before 2.7.0 and 2.8.x before 2.8.3. With the full featured RPC2 interface enabled, it is possible to achieve a temporary DoS state of the management interface when sending an XML Entity Expansion (XEE) payload to the XMLRPC based RPC2 interface. The duration of the DoS state depends on available memory and CPU speed. The default restricted mode of the RPC2 interface is NOT vulnerable.

XEE

An issue was discovered in OpenVPN 2.4.x before 2.4.9

CVE-2020-11810 3.7 - Low - April 27, 2020

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.

Race Condition