CVE-2021-36371
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.
Emissary-Ingress是开源的一个用于 Envoy 代理构建的微服务的 Kubernetes 原生 API 网关。 Emissary-Ingress 存在安全漏洞，该漏洞源于通过1.13.9版本的Emissary-Ingress定义了多个TLSContext且至少存在一个不需要客户端证书认证的配置。攻击者可利用该漏洞绕过后端上游户端证书要求(即需要mTLS证书)。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-36371
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Emissary-Ingress (formerly Ambassador API Gateway) through 1.13.9 allows attackers to bypass client certificate requirements (i.e., mTLS cert_required) on backend upstreams when more than one TLSContext is defined and at least one configuration exists that does not require client certificate authentication. The attacker must send an SNI specifying an unprotected backend and an HTTP Host header specifying a protected backend. (2.x versions are unaffected. 1.x versions are unaffected with certain configuration settings involving prune_unreachable_routes and a wildcard Host resource.)
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
Emissary-Ingress 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Emissary-Ingress是开源的一个用于 Envoy 代理构建的微服务的 Kubernetes 原生 API 网关。 Emissary-Ingress 存在安全漏洞，该漏洞源于通过1.13.9版本的Emissary-Ingress定义了多个TLSContext且至少存在一个不需要客户端证书认证的配置。攻击者可利用该漏洞绕过后端上游户端证书要求(即需要mTLS证书)。
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 | - |
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II. Public POCs for CVE-2021-36371
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-36371 (2)
-
https://github.com/emissary-ingress/emissary/releases/tag/v2.0.0-ea x_refsource_MISC
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https://github.com/emissary-ingress/emissary/issues/3340 x_refsource_MISC
Same Patch Batch · n/a · 2021-07-09 · 48 CVEs total
| CVE-2021-30116 | 10.0 CRITICAL | Unauthenticated credential leak and business logic flaw in Kaseya VSA <= v9.5.6 |
| CVE-2021-30120 | 9.9 CRITICAL | 2FA bypass in Kaseya VSA <= v9.5.6 |
| CVE-2021-30118 | 9.8 CRITICAL | Unauthenticated Remote Code Execution in Kaseya VSA < v9.5.5 |
| CVE-2021-30117 | 9.8 CRITICAL | Authenticated SQL injection in Kaseya VSA < v9.5.6 |
| CVE-2021-23405 | 8.3 HIGH | SQL Injection |
| CVE-2021-30201 | 7.5 HIGH | Unauthenticated XML External Entity vulnerability in Kaseya VSA < v9.5.6 |
| CVE-2021-30121 | 6.5 MEDIUM | (Semi-)Authenticated local file inclusion in Kaseya VSA < v9.5.6 |
| CVE-2021-30119 | 5.4 MEDIUM | Authenticated Authenticated reflective XSS in Kaseya VSA <= v9.5.6 |
| CVE-2020-25875 | Codoforum 跨站脚本漏洞 | |
| CVE-2020-21333 | PublicCMS 跨站脚本漏洞 | |
| CVE-2020-25876 | Codoforum 跨站脚本漏洞 | |
| CVE-2020-25394 | moziloCMS 跨站脚本漏洞 | |
| CVE-2020-35987 | Rukovoditel 跨站脚本漏洞 | |
| CVE-2021-35358 | Dotcms dotCMS 跨站脚本漏洞 | |
| CVE-2021-35361 | Dotcms dotCMS 跨站脚本漏洞 | |
| CVE-2021-35360 | Dotcms dotCMS 跨站脚本漏洞 | |
| CVE-2021-33214 | Hms Networks eCatcher 安全漏洞 | |
| CVE-2021-33792 | Foxit Reader 和 Foxit PhantomPDF 缓冲区错误漏洞 | |
| CVE-2021-33795 | Foxit Reader和Foxit PhantomPDF 安全漏洞 | |
| CVE-2021-27037 | Autodesk Design Review 资源管理错误漏洞 |
Showing top 20 of 48 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
V. Comments for CVE-2021-36371
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