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CVE-2022-36035— Flux CLI Workload Injection

Quick assessment

Affected
fluxcd flux2
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.

Flux2是云原生计算基金会（Cloud Native Computing Foundation）的一种使 Kubernetes 集群与配置源保持同步的工具。 Flux2 v0.21.0到 v0.31.0版本存在路径遍历漏洞，该漏洞源于对用户提供的输入处理不当，攻击者利用该漏洞可以控制路径遍历。

CVSS 7.7 · High EPSS 0.31% · P23
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I. Basic Information for CVE-2022-36035

Vulnerability Information
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Vulnerability Title
Flux CLI Workload Injection
Source: CVE Program / CVE List V5
Vulnerability Description
Flux is a tool for keeping Kubernetes clusters in sync with sources of configuration (like Git repositories), and automating updates to configuration when there is new code to deploy. Flux CLI allows users to deploy Flux components into a Kubernetes cluster via command-line. The vulnerability allows other applications to replace the Flux deployment information with arbitrary content which is deployed into the target Kubernetes cluster instead. The vulnerability is due to the improper handling of user-supplied input, which results in a path traversal that can be controlled by the attacker. Users sharing the same shell between other applications and the Flux CLI commands could be affected by this vulnerability. In some scenarios no errors may be presented, which may cause end users not to realize that something is amiss. A safe workaround is to execute Flux CLI in ephemeral and isolated shell environments, which can ensure no persistent values exist from previous processes. However, upgrading to the latest version of the CLI is still the recommended mitigation strategy.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Flux2 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Flux2是云原生计算基金会（Cloud Native Computing Foundation）的一种使 Kubernetes 集群与配置源保持同步的工具。 Flux2 v0.21.0到 v0.31.0版本存在路径遍历漏洞，该漏洞源于对用户提供的输入处理不当，攻击者利用该漏洞可以控制路径遍历。
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
fluxcd flux2 < 0.32.0, >= 0.21.0 -

II. Public POCs for CVE-2022-36035

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III. Intelligence Information for CVE-2022-36035

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Vendor Advisories for CVE-2022-36035 (1)

Other References for CVE-2022-36035 (1)

IV. Related Vulnerabilities

Same product: flux2
Same vendor: fluxcd
Same weakness: CWE-22

V. Comments for CVE-2022-36035

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