CVE-2022-23606— Crash when a cluster is deleted in Envoy
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I. Basic Information for CVE-2022-23606
Vulnerability Information
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Vulnerability Title
Crash when a cluster is deleted in Envoy
Source: NVD (National Vulnerability Database)
Vulnerability 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 upgrade.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的递归
Source: NVD (National Vulnerability Database)
Vulnerability Title
Envoy 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Envoy是一款开源的分布式代理服务器。 Envoy 存在安全漏洞，该漏洞源于当通过集群发现服务 (CDS) 删除集群时，与该集群中的端点建立的所有空闲连接都将断开连接。 在断开空闲连接的过程中引入了递归，当集群有大量空闲连接时，可能导致堆栈耗尽和进程异常终止。 这种无限递归导致 Envoy 崩溃。 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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| envoyproxy | envoy | >= 1.20.0, < 1.20.2 | - |
II. Public POCs for CVE-2022-23606
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|---|
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- https://github.com/envoyproxy/envoy/security/advisories/GHSA-9vp2-4cp7-vvxfx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2022-23606
Same Patch Batch · envoyproxy · 2022-02-22 · 8 CVEs total
| CVE-2021-43826 | 7.5 HIGH | Crash when tunneling TCP over HTTP in Envoy |
| CVE-2022-21655 | 7.5 HIGH | Incorrect handling of internal redirects results in crash in Envoy |
| CVE-2021-43824 | 7.5 HIGH | Null pointer dereference in envoy |
| CVE-2022-21654 | 7.4 HIGH | Incorrect configuration handling allows TLS session re-use without re-validation in Envoy |
| CVE-2022-21656 | 7.4 HIGH | X.509 subjectAltName matching bypass in Envoy |
| CVE-2022-21657 | 6.8 MEDIUM | X.509 Extended Key Usage and Trust Purposes bypass in Envoy |
| CVE-2021-43825 | 6.1 MEDIUM | Use-after-free in Envoy |
IV. Related Vulnerabilities
Same product: envoy
- CVE-2026-6994
Envoy Query Parameter header_mutation.cc params.add injectio - CVE-2026-26330
Envoy global rate limit may crash when the response phase li - CVE-2026-26311
Envoy HTTP: filter chain execution on reset streams causing - CVE-2026-26310
Crash for scoped ip address in Envoy during DNS - CVE-2026-26309
Envoy has an off-by-one write in JsonEscaper::escapeString()
Same vendor: envoyproxy
- CVE-2026-26330
Envoy global rate limit may crash when the response phase li - CVE-2026-26311
Envoy HTTP: filter chain execution on reset streams causing - CVE-2026-26310
Crash for scoped ip address in Envoy during DNS - CVE-2026-26309
Envoy has an off-by-one write in JsonEscaper::escapeString() - CVE-2026-26308
Envoy has an RBAC Header Validation Bypass via Multi-Value H
Same weakness: CWE-674
V. Comments for CVE-2022-23606
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