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CVE-2022-35954— Delimiter injection vulnerability in @actions/core exportVariable

Quick assessment

Affected
actions toolkit
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.

@actions/core是个人开发者的npm包管理工具的核心函数。该函数用于结果、密钥、日志的配置。 @actions/core 1.9.0及之前版本存在注入漏洞，该漏洞源于core.exportVariable 函数使用一个众所周知的分隔符，攻击者利用该漏洞可以突破该特定变量并将值分配给其他任意变量。

CVSS 5.0 · Medium EPSS 0.65% · P48
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I. Basic Information for CVE-2022-35954

Vulnerability Information
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Vulnerability Title
Delimiter injection vulnerability in @actions/core exportVariable
Source: CVE Program / CVE List V5
Vulnerability Description
The GitHub Actions ToolKit provides a set of packages to make creating actions easier. The `core.exportVariable` function uses a well known delimiter that attackers can use to break out of that specific variable and assign values to other arbitrary variables. Workflows that write untrusted values to the `GITHUB_ENV` file may cause the path or other environment variables to be modified without the intention of the workflow or action author. Users should upgrade to `@actions/core v1.9.1`. If you are unable to upgrade the `@actions/core` package, you can modify your action to ensure that any user input does not contain the delimiter `_GitHubActionsFileCommandDelimeter_` before calling `core.exportVariable`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
@actions/core 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
@actions/core是个人开发者的npm包管理工具的核心函数。该函数用于结果、密钥、日志的配置。 @actions/core 1.9.0及之前版本存在注入漏洞，该漏洞源于core.exportVariable 函数使用一个众所周知的分隔符，攻击者利用该漏洞可以突破该特定变量并将值分配给其他任意变量。
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
actions toolkit <= 1.9.0 -

II. Public POCs for CVE-2022-35954

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III. Intelligence Information for CVE-2022-35954

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Patches & Fixes for CVE-2022-35954 (1)

Vendor Advisories for CVE-2022-35954 (1)

IV. Related Vulnerabilities

Same product: toolkit
Same vendor: actions
Same weakness: CWE-77

V. Comments for CVE-2022-35954

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