CVE-2021-3773
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2021-3773
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | 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 Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | This script exploits the "Port Shadow" vulnerability (CVE-2021-3773) in OpenVPN servers using Netfilter for NAT. | https://github.com/d0rb/CVE-2021-3773 | POC Details |
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2021-3773
请登录查看更多情报信息。
- https://bugzilla.redhat.com/show_bug.cgi?id=2004949x_refsource_MISC
- https://www.oracle.com/security-alerts/cpujul2022.htmlx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-3773
Same Patch Batch · n/a · 2022-02-16 · 50 CVEs total
| CVE-2021-23682 | 7.3 HIGH | Prototype Pollution |
| CVE-2022-22853 | Sourcecodester Hospital Patient Records Management System 跨站脚本漏洞 | |
| CVE-2022-25265 | Linux kernel 安全漏洞 | |
| CVE-2022-24984 | JqueryForm.com Jquery Form Builder 安全漏洞 | |
| CVE-2022-24985 | JqueryForm.com Jquery Form Builder 安全漏洞 | |
| CVE-2022-22880 | Jeecg-boot 安全漏洞 | |
| CVE-2022-22881 | Jeecg-Boot SQL注入漏洞 | |
| CVE-2022-22885 | Hutool 安全漏洞 | |
| CVE-2022-24983 | JqueryForm.com Jquery Form Builder 安全漏洞 | |
| CVE-2021-3578 | Sourceforge mbsync 代码问题漏洞 | |
| CVE-2021-3760 | Linux kernel 资源管理错误漏洞 | |
| CVE-2021-3752 | Linux kernel 竞争条件问题漏洞 | |
| CVE-2022-22945 | VMware NSX-T 操作系统命令注入漏洞 | |
| CVE-2022-23804 | KiCad Eda 缓冲区错误漏洞 | |
| CVE-2022-23803 | KiCad Eda 缓冲区错误漏洞 | |
| CVE-2021-21966 | Texas Instruments Cc3200 SimpleLink Solution Nwp 环境问题漏洞 | |
| CVE-2021-21958 | Hancom Office 缓冲区错误漏洞 | |
| CVE-2021-39300 | Hp Uefi 安全漏洞 | |
| CVE-2021-39299 | Hp Uefi 安全漏洞 | |
| CVE-2021-39301 | Hp Uefi 安全漏洞 |
Showing top 20 of 50 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: kernel
- CVE-2025-26604
Possibility to retrieve bot token by malicious module develo - CVE-2021-35000
OpenBSD Kernel Multicast Routing Uninitialized Memory Inform - CVE-2021-34999
OpenBSD Kernel Multicast Routing Uninitialized Memory Inform - CVE-2021-34981
Linux Kernel Bluetooth CMTP Module Double Free Privilege Esc - CVE-2024-24898
Information Leakage in kernel
Same vendor: n/a
- CVE-2026-8276
bettercap MySQL Server mysql_server.go integer coercion - CVE-2026-8275
bettercap zerogod IPP Service zerogod_ipp_primitives.go ippR - CVE-2026-8270
Open5GS SMF ogs_nas_parse_qos_rules denial of service - CVE-2026-8269
Open5GS SMF smf_nsmf_handle_create_sm_context denial of serv - CVE-2026-8268
Open5GS SMF OpenAPI_list_create denial of service
Same weakness: CWE-200
- CVE-2026-42333
quarkus-openapi-generator has overly broad path-parameter ma - CVE-2026-8198
Activity Logs, User Activity Tracking, Multisite Activity Lo - CVE-2026-42456
AnythingLLM: Cross-User TTS Audio Disclosure via Chat ID (ID - CVE-2026-41520
Cillium exposes sensitive information included in the cilium - CVE-2026-25199
Apache CloudStack: Proxmox Extension Allows Unauthorized Cro
V. Comments for CVE-2021-3773
No comments yet