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I. Basic Information for CVE-2021-3773
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw in netfilter could allow a network-connected attacker to infer openvpn connection endpoint information for further use in traditional network attacks.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
netfilter 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
netfilter是一款使用在Linux系统中的数据包过滤框架。 netfilter 中存在信息泄露漏洞。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
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
VendorProductAffected VersionsCPESubscribe
-kernel kernel 5.14.0-49.el9, kernel 5.15.15-100.fc34, kernel 5.15.15-200.fc35 -
II. Public POCs for CVE-2021-3773
#POC DescriptionSource LinkShenlong Link
1This script exploits the "Port Shadow" vulnerability (CVE-2021-3773) in OpenVPN servers using Netfilter for NAT.https://github.com/d0rb/CVE-2021-3773POC Details
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III. Intelligence Information for CVE-2021-3773
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IV. Related Vulnerabilities
Same product: kernel
Same vendor: n/a
Same weakness: CWE-200
V. Comments for CVE-2021-3773

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