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CVE-2025-4437— Cri-o: large /etc/passwd file may lead to denial of service

Quick assessment

Affected
Red Hat Red Hat OpenShift Container Platform 4
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.

Red Hat OpenShift Container Platform是美国红帽（Red Hat）公司的一套可帮助企业在物理、虚拟和公共云基础架构之间开发、部署和管理现有基于容器的应用程序的应用平台。 Red Hat OpenShift Container Platform 4存在安全漏洞，该漏洞源于读取过大/etc/passwd文件导致内存消耗过高，可能导致拒绝服务攻击。

CVSS 5.7 · Medium EPSS 0.25% · P14

Affected Version Matrix 3

VendorProduct Version RangeStatus
Red Hat Red Hat OpenShift Container Platform 4 any affected
any affected
any affected
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I. Basic Information for CVE-2025-4437

Vulnerability Information
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Vulnerability Title
Cri-o: large /etc/passwd file may lead to denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
There's a vulnerability in the CRI-O application where when container is launched with securityContext.runAsUser specifying a non-existent user, CRI-O attempts to create the user, reading the container's entire /etc/passwd file into memory. If this file is excessively large, it can cause the a high memory consumption leading applications to be killed due to out-of-memory. As a result a denial-of-service can be achieved, possibly disrupting other pods and services running in the same host.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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
Red Hat OpenShift Container Platform 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat OpenShift Container Platform是美国红帽（Red Hat）公司的一套可帮助企业在物理、虚拟和公共云基础架构之间开发、部署和管理现有基于容器的应用程序的应用平台。 Red Hat OpenShift Container Platform 4存在安全漏洞，该漏洞源于读取过大/etc/passwd文件导致内存消耗过高，可能导致拒绝服务攻击。
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
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2025-4437

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III. Intelligence Information for CVE-2025-4437

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IV. Related Vulnerabilities

Same product: Red Hat OpenShift Container Platform 4
Same vendor: Red Hat
Same weakness: CWE-770

V. Comments for CVE-2025-4437

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