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Security Advisories: GSA_kwCzR0hTQS1wdnY4LThmeDktaDY3M80WlQ

Path Traversal in @backstage/plugin-scaffolder-backend

Impact

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 publish:github:pull-request action using 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.

Patches

The vulnerability is patched in the 0.15.9 release of @backstage/plugin-scaffolder-backend.

For more information

If you have any questions or comments about this advisory:

Permalink: https://github.com/advisories/GHSA-pvv8-8fx9-h673
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1wdnY4LThmeDktaDY3M80WlQ
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 3 years ago
Updated: almost 2 years ago


CVSS Score: 6.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

EPSS Percentage: 0.00071
EPSS Percentile: 0.32548

Identifiers: GHSA-pvv8-8fx9-h673, CVE-2021-41151
References: Repository: https://github.com/backstage/backstage
Blast Radius: 17.9

Affected Packages

npm:@backstage/plugin-scaffolder-backend
Dependent packages: 66
Dependent repositories: 424
Downloads: 151,022 last month
Affected Version Ranges: >= 0.9.4, < 0.15.9
Fixed in: 0.15.9
All affected versions: 0.9.4, 0.9.5, 0.9.6, 0.10.0, 0.10.1, 0.11.0, 0.11.1, 0.11.2, 0.11.3, 0.11.4, 0.11.5, 0.12.0, 0.12.1, 0.12.2, 0.12.3, 0.12.4, 0.13.0, 0.14.0, 0.14.1, 0.14.2, 0.15.0, 0.15.1, 0.15.2, 0.15.3, 0.15.4, 0.15.5, 0.15.6, 0.15.7, 0.15.8
All unaffected versions: 0.1.1, 0.2.0, 0.3.0, 0.3.1, 0.3.2, 0.3.3, 0.3.4, 0.3.5, 0.3.6, 0.3.7, 0.4.0, 0.4.1, 0.5.0, 0.5.1, 0.5.2, 0.6.0, 0.7.0, 0.7.1, 0.8.0, 0.9.0, 0.9.1, 0.9.2, 0.9.3, 0.15.9, 0.15.10, 0.15.11, 0.15.12, 0.15.13, 0.15.14, 0.15.15, 0.15.16, 0.15.17, 0.15.18, 0.15.19, 0.15.20, 0.15.21, 0.15.22, 0.15.23, 0.15.24, 0.16.0, 0.16.1, 0.17.0, 0.17.1, 0.17.2, 0.17.3, 0.18.0, 1.0.0, 1.1.0, 1.2.0, 1.3.0, 1.3.1, 1.4.0, 1.5.0, 1.5.1, 1.6.0, 1.7.0, 1.8.0, 1.9.0, 1.10.0, 1.10.1, 1.11.0, 1.12.0, 1.13.0, 1.13.1, 1.14.0, 1.15.0, 1.15.1, 1.16.0, 1.16.1, 1.16.2, 1.16.3, 1.16.4, 1.16.5, 1.17.0, 1.17.1, 1.17.2, 1.17.3, 1.18.0, 1.18.1, 1.19.0, 1.19.1, 1.19.2, 1.20.0, 1.21.0, 1.21.1, 1.21.2, 1.21.3, 1.22.0, 1.22.1, 1.22.2, 1.22.3, 1.22.4, 1.22.5, 1.22.6, 1.22.7, 1.22.8, 1.22.9, 1.22.10, 1.22.11, 1.23.0, 1.24.0, 1.24.1, 1.25.0, 1.25.1, 1.26.0, 1.26.1, 1.26.2, 1.26.3, 1.27.0, 1.27.1, 1.27.2, 1.28.0