CVE-2021-25743— ANSI escape characters in kubectl output are not being filtered
Quick assessment
Affected
Kubernetes Kubernetes
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.
Kubernetes是美国Linux基金会的一套开源的Docker容器集群管理系统。该系统为容器化的应用提供资源调度、部署运行、服务发现和扩容缩容等功能。 kubernetes 存在安全漏洞，该漏洞源于Kubectl不会中和输出到终端的原始数据中包含的转义、元或控制序列。这包括但不限于对象(如Events)中的非结构化字符串字段。
Possible ATT&CK Techniques 1 AI
T1132.002 · Non-Standard Encoding
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I. Basic Information for CVE-2021-25743
Vulnerability Information
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Vulnerability Title
ANSI escape characters in kubectl output are not being filtered
Source: CVE Program / CVE List V5
Vulnerability Description
kubectl does not neutralize escape, meta or control sequences contained in the raw data it outputs to a terminal. This includes but is not limited to the unstructured string fields in objects such as Events.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
转义、元或控制序列转义处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Kubernetes 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kubernetes是美国Linux基金会的一套开源的Docker容器集群管理系统。该系统为容器化的应用提供资源调度、部署运行、服务发现和扩容缩容等功能。 kubernetes 存在安全漏洞，该漏洞源于Kubectl不会中和输出到终端的原始数据中包含的转义、元或控制序列。这包括但不限于对象(如Events)中的非结构化字符串字段。
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 |
|---|---|---|---|---|
| Kubernetes | Kubernetes | unspecified ~ 1.23.1 | - |
|
II. Public POCs for CVE-2021-25743
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-25743 (1)
-
https://security.netapp.com/advisory/ntap-20220217-0003/ x_refsource_CONFIRM
Other References for CVE-2021-25743 (1)
-
https://github.com/kubernetes/kubernetes/issues/101695 x_refsource_MISC
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V. Comments for CVE-2021-25743
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