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CVE-2023-6476— Cri-o: pods are able to break out of resource confinement on cgroupv2

Quick assessment

Affected
Red Hat Red Hat OpenShift Container Platform 4.13
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.

CRI-O是一款用于Kubernetes系统的轻量级容器运行时环境。 CRI-O 存在安全漏洞，该漏洞源于Pod 能够突破 cgroupv2 上的资源限制，导致拒绝服务。

CVSS 6.5 · Medium EPSS 0.86% · P57
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I. Basic Information for CVE-2023-6476

Vulnerability Information
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Vulnerability Title
Cri-o: pods are able to break out of resource confinement on cgroupv2
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in CRI-O that involves an experimental annotation leading to a container being unconfined. This may allow a pod to specify and get any amount of memory/cpu, circumventing the kubernetes scheduler and potentially resulting in a denial of service in the node.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
CRI-O 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CRI-O是一款用于Kubernetes系统的轻量级容器运行时环境。 CRI-O 存在安全漏洞，该漏洞源于Pod 能够突破 cgroupv2 上的资源限制，导致拒绝服务。
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
Red Hat Red Hat OpenShift Container Platform 4.13 0:1.26.4-6.1.rhaos4.13.git9eb9cf3.el9 ~ * cpe:/a:redhat:openshift:4.13::el9
Red Hat Red Hat OpenShift Container Platform 4.14 0:1.27.2-7.rhaos4.14.git1cc7a64.el9 ~ * cpe:/a:redhat:openshift:4.14::el9
Red Hat Red Hat OpenShift Container Platform 3.11 - cpe:/a:redhat:openshift:3.11

II. Public POCs for CVE-2023-6476

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III. Intelligence Information for CVE-2023-6476

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Vendor Advisories for CVE-2023-6476 (4)

IV. Related Vulnerabilities

Same vendor: Red Hat
Same weakness: CWE-770

V. Comments for CVE-2023-6476

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