CVE-2021-43826

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub_MCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVEADP
---
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CISA-ADPADP
---
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Base Score
CVSS 3.x
EPSS Score
Percentile: 26%
VendorProductVersion
envoyproxyenvoy
𝑥
< 1.18.6
envoyproxyenvoy
1.19.0 ≤
𝑥
< 1.19.3
envoyproxyenvoy
1.20.0 ≤
𝑥
< 1.20.2
envoyproxyenvoy
1.21.0 ≤
𝑥
< 1.21.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145
https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf
https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145
https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf