CVE-2021-3547
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I. Basic Information for CVE-2021-3547
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用基本弱点进行的认证绕过
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenVPN 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenVPN是美国OpenVPN公司的一个用于创建虚拟专用网络（VPN）加密通道的软件包，它使用OpenSSL库来加密数据与控制信息，并允许创建的VPN使用公开密钥、电子证书或者用户名/密码来进行身份验证。 OpenVPN 中存在信任管理问题漏洞，该漏洞源于当用户配置为verify-x509-name选项时，客户端未验证服务端证书的有效性，攻击者可通过修改主机名绕过证书认证模拟服务端与客户端进行交互。以下产品及版本受到影响：OpenVPN 3.6 版本、 OpenVPN 3.6.1 版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | OpenVPN 3 Core Library | 3.6 and 3.6.1 | - |
II. Public POCs for CVE-2021-3547
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-3547 (2)
- https://community.openvpn.net/openvpn/wiki/SecurityAnnouncementsx_refsource_MISC
- https://community.openvpn.net/openvpn/wiki/CVE-2021-3547x_refsource_MISC
Same Patch Batch · n/a · 2021-07-12 · 27 CVEs total
| CVE-2021-23389 | 9.8 CRITICAL | Arbitrary Code Execution |
| CVE-2021-23390 | 9.8 CRITICAL | Arbitrary Code Execution |
| CVE-2021-36382 | 2.6 LOW | Devolutions Server 信任管理问题漏洞 |
| CVE-2021-33807 | Cartadis Gespage 路径遍历漏洞 | |
| CVE-2021-22916 | Brave 安全漏洞 | |
| CVE-2021-22917 | Brave Browser Tor Window 安全漏洞 | |
| CVE-2021-27293 | RestSharp 安全漏洞 | |
| CVE-2021-35037 | JAMF Jamf Pro 输入验证错误漏洞 | |
| CVE-2021-35064 | VIAware 安全漏洞 | |
| CVE-2021-36377 | Fossil 信任管理问题漏洞 | |
| CVE-2020-21131 | Metinfo MetInfo SQL注入漏洞 | |
| CVE-2020-21132 | Metinfo MetInfo SQL注入漏洞 | |
| CVE-2020-21133 | Metinfo MetInfo SQL注入漏洞 | |
| CVE-2021-36383 | Xen 安全漏洞 | |
| CVE-2020-18979 | Halo 跨站脚本漏洞 | |
| CVE-2020-18544 | WMS SQL注入漏洞 | |
| CVE-2020-18980 | Halo 安全漏洞 | |
| CVE-2020-19204 | Lightning Wire Labs IPFire 跨站脚本漏洞 | |
| CVE-2020-19203 | pfSense 跨站脚本漏洞 | |
| CVE-2021-36381 | Edifecs Transaction Management 注入漏洞 |
Showing top 20 of 27 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: OpenVPN 3 Core Library
Same vendor: n/a
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JeecgBoot SysUser userEdit user.getUsername access control - CVE-2026-9572
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Same weakness: CWE-305
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Devolutions Server 多因素认证绕过漏洞 - CVE-2026-41054
Missing exit out of permission check in haveged could lead t - CVE-2026-6334
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