Helm up to 3.5.1 version injection

CVE编号

CVE-2021-21303

利用情况

暂无

补丁情况

N/A

披露时间

2021-02-06

漏洞描述

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.

解决建议

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://github.com/helm/helm/commit/6ce9ba60b73013857e2e7c73d3f86ed70bc1ac9a
https://github.com/helm/helm/releases/tag/v3.5.2
https://github.com/helm/helm/security/advisories/GHSA-c38g-469g-cmgx

受影响软件情况

#	类型	厂商	产品	版本	影响面
1
	运行在以下环境
	应用	helm	helm	*	From (including) 3.0.0	Up to (excluding) 3.5.2

CVSS3评分 5.9

• 攻击路径 本地
• 攻击复杂度 低
• 权限要求 低
• 影响范围 已更改
• 用户交互 需要
• 可用性 无
• 保密性 无
• 完整性 高

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N CWE-ID 漏洞类型 CWE-74 输出中的特殊元素转义处理不恰当（注入）