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CVE-2022-21701— Privileged Escalation 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版本存在权限许可和访问控制问题漏洞，攻击者可利用该漏洞升级权限以创建他们可能无权访问的其他资源。

CVSS 5.0 · Medium EPSS 0.77% · P53

Possible ATT&CK Techniques 1 AI

T1611 · Escape to Host
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I. Basic Information for CVE-2022-21701

Vulnerability Information
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Vulnerability Title
Privileged Escalation in Istio
Source: CVE Program / CVE List V5
Vulnerability Description
Istio is an open platform to connect, manage, and secure microservices. In versions 1.12.0 and 1.12.1 Istio is vulnerable to a privilege escalation attack. Users who have `CREATE` permission for `gateways.gateway.networking.k8s.io` objects can escalate this privilege to create other resources that they may not have access to, such as `Pod`. This vulnerability impacts only an Alpha level feature, the Kubernetes Gateway API. This is not the same as the Istio Gateway type (gateways.networking.istio.io), which is not vulnerable. Users are advised to upgrade to resolve this issue. Users unable to upgrade should implement any of the following which will prevent this vulnerability: Remove the gateways.gateway.networking.k8s.io CustomResourceDefinition, set PILOT_ENABLE_GATEWAY_API_DEPLOYMENT_CONTROLLER=true environment variable in Istiod, or remove CREATE permissions for gateways.gateway.networking.k8s.io objects from untrusted users.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Istio 权限许可和访问控制问题漏洞
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版本存在权限许可和访问控制问题漏洞，攻击者可利用该漏洞升级权限以创建他们可能无权访问的其他资源。
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-2022-21701

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III. Intelligence Information for CVE-2022-21701

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Vendor Advisories for CVE-2022-21701 (1)

Other References for CVE-2022-21701 (1)

IV. Related Vulnerabilities

Same product: istio
Same vendor: istio
Same weakness: CWE-863

V. Comments for CVE-2022-21701

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