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I. Basic Information for CVE-2023-27491
Vulnerability Information

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Vulnerability Title
Envoy forwards invalid Http2/Http3 downstream headers
Source: NVD (National Vulnerability Database)
Vulnerability Description
Envoy is an open source edge and service proxy designed for cloud-native applications. Compliant HTTP/1 service should reject malformed request lines. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, There is a possibility that non compliant HTTP/1 service may allow malformed requests, potentially leading to a bypass of security policies. This issue is fixed in versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Envoy 环境问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Envoy是一款开源的分布式代理服务器。 Envoy存在环境问题漏洞,该漏洞源于不兼容的 HTTP/1 服务允许格式错误的请求,从而导致安全策略被绕过。以下是受影响的版本:1.26.0之前版本,1.25.3之前版本,1.24.4之前版本,1.23.6之前版本,1.22.9之前版本。
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
envoyproxyenvoy >= 1.25.0, < 1.25.3 -
II. Public POCs for CVE-2023-27491
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III. Intelligence Information for CVE-2023-27491
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IV. Related Vulnerabilities
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