CVE-2021-44273
Quick assessment
Affected
n/a n/a
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
e2guardian是一个Web内容过滤器，可以在代理，透明或icap服务器模式下工作。 e2guardian 存在信任管理问题漏洞，该漏洞源于 e2guardian v5.4.x <= v5.4.3r 受 SSL MITM 引擎中缺少 SSL 证书验证的影响。 在独立模式下（即充当代理或透明代理），启用 SSL MITM 的情况下，e2guardian（如果使用 OpenSSL v1.1.x 构建）不会验证其连接的 Web 服务器证书中的主机名，因此 本身容易受到 MITM 攻击。
Possible ATT&CK Techniques 1 AI
T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2021-44273
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
e2guardian v5.4.x <= v5.4.3r is affected by missing SSL certificate validation in the SSL MITM engine. In standalone mode (i.e., acting as a proxy or a transparent proxy), with SSL MITM enabled, e2guardian, if built with OpenSSL v1.1.x, did not validate hostnames in certificates of the web servers that it connected to, and thus was itself vulnerable to MITM attacks.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
e2guardian 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
e2guardian是一个Web内容过滤器，可以在代理，透明或icap服务器模式下工作。 e2guardian 存在信任管理问题漏洞，该漏洞源于 e2guardian v5.4.x <= v5.4.3r 受 SSL MITM 引擎中缺少 SSL 证书验证的影响。 在独立模式下（即充当代理或透明代理），启用 SSL MITM 的情况下，e2guardian（如果使用 OpenSSL v1.1.x 构建）不会验证其连接的 Web 服务器证书中的主机名，因此 本身容易受到 MITM 攻击。
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 |
|---|---|---|---|---|
| - | n/a | n/a | - |
|
II. Public POCs for CVE-2021-44273
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2021-44273 (2)
Other References for CVE-2021-44273 (1)
Same Patch Batch · n/a · 2021-12-23 · 22 CVEs total
| CVE-2021-45462 | 7.5 HIGH | Open5Gs 输入验证错误漏洞 |
| CVE-2020-35398 | Nch Software UTI Mutual fund 安全漏洞 | |
| CVE-2021-3621 | SSSD 操作系统命令注入漏洞 | |
| CVE-2021-45470 | cve-search 安全漏洞 | |
| CVE-2021-3622 | hivex 资源管理错误漏洞 | |
| CVE-2021-27006 | Netapp StorageGRID 安全漏洞 | |
| CVE-2021-3584 | Foreman 操作系统命令注入漏洞 | |
| CVE-2021-27007 | NetApp Virtual Desktop Service 安全漏洞 | |
| CVE-2021-4024 | Podman 访问控制错误漏洞 | |
| CVE-2021-44543 | Privoxy 跨站脚本漏洞 | |
| CVE-2021-44542 | Privoxy 输入验证错误漏洞 | |
| CVE-2021-44541 | Privoxy 输入验证错误漏洞 | |
| CVE-2021-44540 | Privoxy 输入验证错误漏洞 | |
| CVE-2021-20318 | Red Hat Jboss Enterprise Application Platform 7 代码问题漏洞 | |
| CVE-2021-45469 | Linux kernel 缓冲区错误漏洞 | |
| CVE-2021-40161 | Autodesk Navisworks 缓冲区错误漏洞 | |
| CVE-2021-40160 | Autodesk Navisworks 缓冲区错误漏洞 | |
| CVE-2021-44526 | Zoho ManageEngine SupportCenter Plus 授权问题漏洞 | |
| CVE-2021-44600 | Simple Online Mens Salon Management SystemSQL注入漏洞 | |
| CVE-2021-44599 | Online Enrollment Management System SQL注入漏洞 |
Showing top 20 of 22 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
V. Comments for CVE-2021-44273
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