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CVE-2021-21303— Helm 注入漏洞

一分钟漏洞结论

影响对象
helm helm
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。

Helm是一款Kubernetes包管理器。 Helm 存在注入漏洞，该漏洞源于从可能不受信任的源加载的数据没有得到适当的处理。

CVSS 5.9 · Medium EPSS 1.03% · P62
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一、 漏洞 CVE-2021-21303 基础信息

漏洞信息
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Vulnerability Title
Injection attack in Helm
来源: CVE Program / CVE List V5
Vulnerability Description
Helm is open-source software which is essentially "The Kubernetes Package Manager". Helm is a tool for managing Charts. Charts are packages of pre-configured Kubernetes resources. In Helm from version 3.0 and before version 3.5.2, there a few cases where data loaded from potentially untrusted sources was not properly sanitized. When a SemVer in the `version` field of a chart is invalid, in some cases Helm allows the string to be used "as is" without sanitizing. Helm fails to properly sanitized some fields present on Helm repository `index.yaml` files. Helm does not properly sanitized some fields in the `plugin.yaml` file for plugins In some cases, Helm does not properly sanitize the fields in the `Chart.yaml` file. By exploiting these attack vectors, core maintainers were able to send deceptive information to a terminal screen running the `helm` command, as well as obscure or alter information on the screen. In some cases, we could send codes that terminals used to execute higher-order logic, like clearing a terminal screen. Further, during evaluation, the Helm maintainers discovered a few other fields that were not properly sanitized when read out of repository index files. This fix remedies all such cases, and once again enforces SemVer2 policies on version fields. All users of the Helm 3 should upgrade to the fixed version 3.5.2 or later. Those who use Helm as a library should verify that they either sanitize this data on their own, or use the proper Helm API calls to sanitize the data.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
来源: CVE Program / CVE List V5
Vulnerability Title
Helm 注入漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Helm是一款Kubernetes包管理器。 Helm 存在注入漏洞，该漏洞源于从可能不受信任的源加载的数据没有得到适当的处理。
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
helm helm > 3.0, < 3.5.2 -

二、漏洞 CVE-2021-21303 的公开POC

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三、漏洞 CVE-2021-21303 的情报信息

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CVE-2021-21303 补丁与修复 (1)

CVE-2021-21303 厂商安全公告 (1)

CVE-2021-21303 厂商页面 (1)

IV. Related Vulnerabilities

Same product: helm
Same vendor: helm
Same weakness: CWE-74

V. Comments for CVE-2021-21303

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