CVE-2022-23606 — Uncontrolled Recursion in Envoy

CWE-674 — Uncontrolled Recursion CWE-770 — Allocation of Resources Without Limits or Throttling2 documents2 sources

Severity

6.5MEDIUMNVD

EPSS

0.1%

top 73.01%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Envoyproxy Envoy

Timeline

PublishedFeb 22

Description

Envoy is an open source edge and service proxy, designed for cloud-native applications. When a cluster is deleted via Cluster Discovery Service (CDS) all idle connections established to endpoints in that cluster are disconnected. A recursion was introduced in the procedure of disconnecting idle connections that can lead to stack exhaustion and abnormal process termination when a cluster has a large number of idle connections. This infinite recursion causes Envoy to crash. Users are advised to up…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages2 packages

▶NVDenvoyproxy/envoy1.20.0 — 1.20.2+1

▶CVEListV5envoyproxy/envoy>= 1.20.0, < 1.20.2, >= 1.21.0, < 1.21.1+1

Patches

Patch: github.com ↗Patch: github.com ↗

📋Vendor Advisories

Red Hat

envoy: Stack exhaustion when a cluster is deleted via Cluster Discovery Service↗2022-02-22

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