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CVE-2022-21679— Authorization Policy bypass 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 1.12.0 和 1.12.1版本存在授权问题漏洞，攻击者可利用该漏洞绕过主机和NOTHOST的授权策略，或执行拒绝服务攻击。

CVSS 6.8 · Medium EPSS 1.07% · P62

Possible ATT&CK Techniques 2 AI

T1530.001 T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2022-21679

Vulnerability Information
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Vulnerability Title
Authorization Policy bypass in Istio
Source: CVE Program / CVE List V5
Vulnerability Description
Istio is an open platform to connect, manage, and secure microservices. In Istio 1.12.0 and 1.12.1 The authorization policy with hosts and notHosts might be accidentally bypassed for ALLOW action or rejected unexpectedly for DENY action during the upgrade from 1.11 to 1.12.0/1.12.1. Istio 1.12 supports the hosts and notHosts fields in authorization policy with a new Envoy API shipped with the 1.12 data plane. A bug in the 1.12.0 and 1.12.1 incorrectly uses the new Envoy API with the 1.11 data plane. This will cause the hosts and notHosts fields to be always matched regardless of the actual value of the host header when mixing 1.12.0/1.12.1 control plane and 1.11 data plane. Users are advised to upgrade or to not mix the 1.12.0/1.12.1 control plane with 1.11 data plane if using hosts or notHosts field in authorization policy.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
控制流实现总是不正确
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 1.12.0 和 1.12.1版本存在授权问题漏洞，攻击者可利用该漏洞绕过主机和NOTHOST的授权策略，或执行拒绝服务攻击。
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 >= 1.12.0, < 1.12.2 -

II. Public POCs for CVE-2022-21679

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III. Intelligence Information for CVE-2022-21679

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Vendor Advisories for CVE-2022-21679 (1)

Other References for CVE-2022-21679 (1)

IV. Related Vulnerabilities

Same product: istio
Same vendor: istio
Same weakness: CWE-670

V. Comments for CVE-2022-21679

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