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CVE-2021-41151— Path Traversal in @backstage/plugin-scaffolder-backend

Quick assessment

Affected
backstage backstage
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.

backstage是一个应用软件。后台是一个开放的平台,用于构建开发者门户 Backstage 存在路径遍历漏洞，该漏洞源于可以从运行 Scaffolder Tasks 的环境中读取敏感文件。 攻击是通过使用 操作和特定源路径制作自定义 Scaffolder 模板来执行的。 执行模板时，敏感文件将包含在已发布的拉取请求中。 由于攻击者需要访问权限才能在 Backstage 目录中创建和注册模板，并且由于通过拉取请求进行渗透，因此攻击非常明显，因此

CVSS 6.8 · Medium EPSS 1.31% · P70

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2021-41151

Vulnerability Information
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Vulnerability Title
Path Traversal in @backstage/plugin-scaffolder-backend
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open platform for building developer portals. In affected versions A malicious actor could read sensitive files from the environment where Scaffolder Tasks are run. The attack is executed by crafting a custom Scaffolder template with a `github:publish:pull-request` action and a particular source path. When the template is executed the sensitive files would be included in the published pull request. This vulnerability is mitigated by the fact that an attacker would need access to create and register templates in the Backstage catalog, and that the attack is very visible given that the exfiltration happens via a pull request. The vulnerability is patched in the `0.15.9` release of `@backstage/plugin-scaffolder-backend`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
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
backstage 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
backstage是一个应用软件。后台是一个开放的平台,用于构建开发者门户 Backstage 存在路径遍历漏洞，该漏洞源于可以从运行 Scaffolder Tasks 的环境中读取敏感文件。 攻击是通过使用 `github:publish:pull-request` 操作和特定源路径制作自定义 Scaffolder 模板来执行的。 执行模板时，敏感文件将包含在已发布的拉取请求中。 由于攻击者需要访问权限才能在 Backstage 目录中创建和注册模板，并且由于通过拉取请求进行渗透，因此攻击非常明显，因此
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
backstage backstage >=0.9.4, < 0.15.9 -

II. Public POCs for CVE-2021-41151

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III. Intelligence Information for CVE-2021-41151

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Patches & Fixes for CVE-2021-41151 (1)

Vendor Advisories for CVE-2021-41151 (1)

IV. Related Vulnerabilities

Same product: backstage
Same vendor: backstage
Same weakness: CWE-22

V. Comments for CVE-2021-41151

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