CVE-2021-20230
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I. Basic Information for CVE-2021-20230
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
证书验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Stunnel 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MichałTrojnara Stunnel是 MichałTrojnara开源的一个应用软件。提供TLS加密功能添加到现有客户端和服务器，而无需更改程序代码。 Stunnel 存在信任管理问题漏洞，该漏洞源于使用重定向和verifyChain选项时，客户端证书没有正确验证。以下产品和版本受到影响：stunnel before 5.57
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 |
|---|---|---|---|---|
| - | stunnel | stunnel 5.57 | - |
II. Public POCs for CVE-2021-20230
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://bugzilla.redhat.com/show_bug.cgi?id=1925226x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-20230
Same Patch Batch · n/a · 2021-02-23 · 56 CVEs total
| CVE-2020-28429 | 7.3 HIGH | Command Injection |
| CVE-2021-22882 | UniFi Protect 资源管理错误漏洞 | |
| CVE-2021-3405 | Matroska libebml 缓冲区错误漏洞 | |
| CVE-2021-3410 | libcaca 输入验证错误漏洞 | |
| CVE-2021-3407 | artifex mupdf 资源管理错误漏洞 | |
| CVE-2021-20182 | Red Hat openshift4/ose-docker-builder 安全漏洞 | |
| CVE-2021-20252 | Red Hat scale API Management Platform 输入验证错误漏洞 | |
| CVE-2021-20247 | Sourceforge mbsync 路径遍历漏洞 | |
| CVE-2020-27782 | Red Hat Undertow 资源管理错误漏洞 | |
| CVE-2020-8297 | Nextcloud Deck 安全漏洞 | |
| CVE-2021-22112 | Vmware VMware Spring Security 权限许可和访问控制问题漏洞 | |
| CVE-2020-28587 | SoftMaker Office PlanMaker 缓冲区错误漏洞 | |
| CVE-2020-7120 | Aruba ClearPass Policy Manager 安全漏洞 | |
| CVE-2021-26677 | Aruba ClearPass Policy Manager 安全漏洞 | |
| CVE-2021-26679 | Aruba ClearPass Policy Manager 命令注入漏洞 | |
| CVE-2021-26680 | Aruba ClearPass Policy Manager 命令注入漏洞 | |
| CVE-2021-27582 | MITREid Connect 安全漏洞 | |
| CVE-2021-26678 | Aruba ClearPass Policy Manager Prior 跨站脚本漏洞 | |
| CVE-2021-22651 | Luxion KeyShot 路径遍历漏洞 | |
| CVE-2021-20198 | Red Hat OpenShift Container Platform 访问控制错误漏洞 |
Showing top 20 of 56 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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-295
V. Comments for CVE-2021-20230
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