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CVE-2022-23635— Unauthenticated control plane denial of service attack in Istio

Quick assessment

Affected
istio istio
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Istio是一套连接、管理和保护微服务的开放平台。 Istio 存在授权问题漏洞，该漏洞源于在受影响的版本中，Istio控制平面“istiod”很容易出现请求处理错误。攻击者可利用该漏洞发送一个特别设计的消息，导致控制平面崩溃。

CVSS 7.5 · High EPSS 1.66% · P75
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I. Basic Information for CVE-2022-23635

Vulnerability Information
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Vulnerability Title
Unauthenticated control plane denial of service attack in Istio
Source: CVE Program / CVE List V5
Vulnerability Description
Istio is an open platform to connect, manage, and secure microservices. In affected versions the Istio control plane, `istiod`, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing. This endpoint is served over TLS port 15012, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially [multicluster](https://istio.io/latest/docs/setup/install/multicluster/primary-remote/) topologies, this port is exposed over the public internet. There are no effective workarounds, beyond upgrading. Limiting network access to Istiod to the minimal set of clients can help lessen the scope of the vulnerability to some extent.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Istio 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Istio是一套连接、管理和保护微服务的开放平台。 Istio 存在授权问题漏洞，该漏洞源于在受影响的版本中，Istio控制平面“istiod”很容易出现请求处理错误。攻击者可利用该漏洞发送一个特别设计的消息，导致控制平面崩溃。
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
istio istio >= 1.13.0, < 1.13.1 -

II. Public POCs for CVE-2022-23635

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III. Intelligence Information for CVE-2022-23635

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Patches & Fixes for CVE-2022-23635 (1)

Vendor Advisories for CVE-2022-23635 (1)

Other References for CVE-2022-23635 (1)

IV. Related Vulnerabilities

Same product: istio
Same vendor: istio
Same weakness: CWE-287

V. Comments for CVE-2022-23635

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