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CVE-2023-35926— Insecure sandbox in Backstage Scaffolder plugin

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 1.15.0之前版本存在代码注入漏洞，该漏洞源于允许攻击者在基架文件夹后端实例上执行远程代码。

CVSS 8.1 · High EPSS 1.89% · P79
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I. Basic Information for CVE-2023-35926

Vulnerability Information
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Vulnerability Title
Insecure sandbox in Backstage Scaffolder plugin
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open platform for building developer portals. The Backstage scaffolder-backend plugin uses a templating library that requires sandbox, as it by design allows for code injection. The library used for this sandbox so far has been `vm2`, but in light of several past vulnerabilities and existing vulnerabilities that may not have a fix, the plugin has switched to using a different sandbox library. A malicious actor with write access to a registered scaffolder template could manipulate the template in a way that allows for remote code execution on the scaffolder-backend instance. This was only exploitable in the template YAML definition itself and not by user input data. This is vulnerability is fixed in version 1.15.0 of `@backstage/plugin-scaffolder-backend`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Backstage 代码注入漏洞
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 1.15.0之前版本存在代码注入漏洞，该漏洞源于允许攻击者在基架文件夹后端实例上执行远程代码。
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 < 1.15.0 -

II. Public POCs for CVE-2023-35926

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III. Intelligence Information for CVE-2023-35926

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Patches & Fixes for CVE-2023-35926 (1)

Vendor Advisories for CVE-2023-35926 (1)

Other References for CVE-2023-35926 (1)

IV. Related Vulnerabilities

Same product: backstage
Same vendor: backstage
Same weakness: CWE-94

V. Comments for CVE-2023-35926

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