CVE-2021-43783 – @backstage/plugin-scaffolder-backend

Package

Manager: npm
Name: @backstage/plugin-scaffolder-backend
Vulnerable Version: >=0 <0.15.14

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L

EPSS: 0.00353 pctl0.56966

Details

Path Traversal in @backstage/plugin-scaffolder-backend ### Impact A malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. ### Patches This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. ### Workarounds This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates. ### For more information If you have any questions or comments about this advisory: * Open an issue in the [Backstage repository](https://github.com/backstage/backstage) * Visit our chat, linked to in [Backstage README](https://github.com/backstage/backstage)

Metadata

Created: 2021-12-01T18:28:51Z
Modified: 2021-11-29T20:22:25Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/12/GHSA-mg3m-f475-28hv/GHSA-mg3m-f475-28hv.json
CWE IDs: ["CWE-22"]
Alternative ID: GHSA-mg3m-f475-28hv
Finding: F063
Auto approve: 1