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CVE-2023-34091— Kyverno 安全漏洞

一分钟漏洞结论

影响对象
kyverno kyverno
利用判断
尚无明确在野利用证据,仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本;无法立即升级时,限制受影响服务暴露并加强监测。

Kyverno是Kyverno开源的一个为 Kubernetes 设计的策略引擎。 Kyverno 1.10.0之前版本存在安全漏洞,该漏洞源于deletionTimestamp字段的资源可以绕过验证、生成或改变现有策略。

CVSS 6.5 · Medium EPSS 0.50% · P41
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一、 漏洞 CVE-2023-34091 基础信息

漏洞信息

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Vulnerability Title
Kyverno resource with a deletionTimestamp may allow policy circumvention
来源: CVE Program / CVE List V5
Vulnerability Description
Kyverno is a policy engine designed for Kubernetes. In versions of Kyverno prior to 1.10.0, resources which have the `deletionTimestamp` field defined can bypass validate, generate, or mutate-existing policies, even in cases where the `validationFailureAction` field is set to `Enforce`. This situation occurs as resources pending deletion were being consciously exempted by Kyverno, as a way to reduce processing load as policies are typically not applied to objects which are being deleted. However, this could potentially result in allowing a malicious user to leverage the Kubernetes finalizers feature by setting a finalizer which causes the Kubernetes API server to set the `deletionTimestamp` and then not completing the delete operation as a way to explicitly to bypass a Kyverno policy. Note that this is not applicable to Kubernetes Pods but, as an example, a Kubernetes Service resource can be manipulated using an indefinite finalizer to bypass policies. This is resolved in Kyverno 1.10.0. There is no known workaround.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
来源: CVE Program / CVE List V5
Vulnerability Title
Kyverno 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Kyverno是Kyverno开源的一个为 Kubernetes 设计的策略引擎。 Kyverno 1.10.0之前版本存在安全漏洞,该漏洞源于deletionTimestamp字段的资源可以绕过验证、生成或改变现有策略。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
kyverno kyverno < 1.10.0 -

二、漏洞 CVE-2023-34091 的公开POC

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三、漏洞 CVE-2023-34091 的情报信息

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CVE-2023-34091 厂商安全公告 (1)

IV. Related Vulnerabilities

V. Comments for CVE-2023-34091

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