Cyber Resilience

CVE-2022-21655

High

Published: 22 February 2022

Published
22 February 2022
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0016 37.1th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2022-21655 is a high-severity Always-Incorrect Control Flow Implementation (CWE-670) vulnerability in Envoyproxy Envoy. Its CVSS base score is 7.5 (High).

Operationally, ranked at the 37.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Envoy is an open source edge and service proxy, designed for cloud-native applications. The envoy common router will segfault if an internal redirect selects a route configured with direct response or redirect actions. This will result in a denial of…

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service. As a workaround turn off internal redirects if direct response entries are configured on the same listener.

CWE(s)
CWE-670

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

envoyproxy
envoy
≤ 1.18.6 · 1.19.0 — 1.19.3 · 1.20.0 — 1.20.2

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References