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I. Basic Information for CVE-2021-43826
Vulnerability Information

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Vulnerability Title
Crash when tunneling TCP over HTTP in Envoy
Source: NVD (National Vulnerability Database)
Vulnerability Description
Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions of Envoy a crash occurs when configured for :ref:`upstream tunneling <envoy_v3_api_field_extensions.filters.network.tcp_proxy.v3.TcpProxy.tunneling_config>` and the downstream connection disconnects while the the upstream connection or http/2 stream is still being established. There are no workarounds for this issue. Users are advised to upgrade.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
释放后使用
Source: NVD (National Vulnerability Database)
Vulnerability Title
Envoy 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Envoy是一款开源的分布式代理服务器。 Envoy 存在资源管理错误漏洞,该漏洞源于当为上游隧道配置envoy_v3_api_field_extensions.filters.network.tcp_proxy.v3.TcpProxy.tunneling_config时发生崩溃,并且下游连接断开,而上游连接或 http/2 流仍然存在。 没有解决此问题的方法。 建议用户升级。
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 < 1.18.6 -
II. Public POCs for CVE-2021-43826
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III. Intelligence Information for CVE-2021-43826
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IV. Related Vulnerabilities
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