CVE-2025-12106: Buffer Over-read

Insufficient argument validation in OpenVPN 2.7alpha1 through 2.7rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses...

OpenVPN 安全漏洞

OpenVPN is a software package for creating encrypted tunnels for virtual private networks VPNs from US-based OpenVPN, which uses the OpenSSL library to encrypt data and control information and allows the created VPN to be authenticated using a public key, an electronic certificate, or a...

OESA-2025-2742 openvpn security update

OpenVPN is a full-featured open source SSL VPN solution that accommodates a wide range of configurations, including remote access, site-to-site VPNs, Wi-Fi security, and enterprise-scale remote access solutions with load balancing, failover, and fine-grained access-controls. Starting with the...

Ubuntu: Security Advisory (USN-7898-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2025 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

PT-2025-48947

Name of the Vulnerable Software and Affected Versions OpenVPN versions 2.5.0 through 2.7 rc2 Description A local authenticated user can connect to the interactive service agent and trigger an error, resulting in a local denial of service. Recommendations Update to a version later than 2.7 rc2...

USN-7898-1 openvpn vulnerability

Joshua Rogers discovered that OpenVPN incorrectly handled HMAC verification checks. A remote attacker could possibly use this issue to bypass source IP address validation...

USN-7898-1: OpenVPN vulnerability

Joshua Rogers discovered that OpenVPN incorrectly handled HMAC verification checks. A remote attacker could possibly use this issue to bypass source IP address validation...

Improper Input Validation

OpenVPN is vulnerable to Improper Input Validation. The vulnerability is due to improper validation of source IP addresses during session handling, which allows an attacker to open a session from a different IP address than the one that initiated the connection and cause a denial of service for t...

The vulnerability of the memcmp() function in OpenVPN software allows a hacker to gain unauthorized access to protected information.

The vulnerability of the memcmp function in OpenVPN software is related to the use of a cryptographic algorithm that has vulnerabilities when processing HMAC requests. Exploiting this vulnerability can allow an unauthorized attacker to gain unauthorized access to protected information...

Slackware: Security Advisory (SSA:2025-323-01)

The remote host is missing an update for the SPDX-FileCopyrightText: 2025 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

OpenVPN HMAC Verification Vulnerability Bypass (Nov 2025) - Windows

OpenVPN is prone to a hmac bypass verification vulnerability. SPDX-FileCopyrightText: 2025 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only CPE = "cpe:/a:openvpn:openvpn";...

TencentOS Server 4: openvpn (TSSA-2025:0278)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2025:0278 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:...

[slackware-security] openvpn

New openvpn packages are available for Slackware 15.0 and -current to fix security issues. Here are the details from the Slackware 15.0 ChangeLog: patches/packages/openvpn-2.6.16-i586-1slack15.0.txz: Upgraded. This update fixes a security issue: Fix memcmp check for the hmac verification in the...

Slackware Linux 15.0 / current openvpn Vulnerability (SSA:2025-323-01)

The version of openvpn installed on the remote host is prior to 2.6.16. It is, therefore, affected by a vulnerability as referenced in the SSA:2025-323-01 advisory. New openvpn packages are available for Slackware 15.0 and -current to fix security issues. Tenable has extracted the preceding...

FreeBSD : OpenVPN -- HMAC verification on source IP address ineffective (17a40d76-c3fd-11f0-b513-0da7be77c170)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 17a40d76-c3fd-11f0-b513-0da7be77c170 advisory. Arne Schwabe reports: Fix memcmp check for the hmac verification in the 3way handshake being inverted...

FreeBSD : OpenVPN -- avoid buffer overread parsing routes or endpoints (50a0c266-c3ff-11f0-b513-0da7be77c170)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 50a0c266-c3ff-11f0-b513-0da7be77c170 advisory. Mikhail Khachaiants reports: socket: reject mismatched address family in getaddrgeneric. Add a family...

PT-2025-47577

Name of the Vulnerable Software and Affected Versions OpenVPN versions prior to 2.6.16 Description The memcmp function in OpenVPN has an issue related to the use of a cryptographic algorithm with flaws when processing HMAC requests. Successful exploitation could allow a remote attacker to gain...

CVE-2025-34304

IPFire versions prior to 2.29 Core Update 198 contain a SQL injection vulnerability that allows an authenticated attacker to manipulate the SQL query used when viewing OpenVPN connection logs via the CONNECTIONNAME parameter. When viewing a range of OpenVPN connection logs, the application issues...

The vulnerability of the --dns-updown component of the OpenVPN software allows a hacker to execute arbitrary code.

The vulnerability of the --dns-updown component of the OpenVPN software is related to the lack of measures taken to neutralize special elements during the processing of arguments --dns and --dhcp-option. Exploiting this vulnerability allows a remote attacker to execute arbitrary code...

EUVD-2025-36510

IPFire versions prior to 2.29 Core Update 198 contain a SQL injection vulnerability that allows an authenticated attacker to manipulate the SQL query used when viewing OpenVPN connection logs via the CONNECTIONNAME parameter. When viewing a range of OpenVPN connection logs, the application issues...