CVE-2021-43783

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Summary

CVECVE-2021-43783
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-11-29 20:15:00 UTC
Updated2021-12-01 19:41:00 UTC
Description@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions 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. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates.

Risk And Classification

Problem Types: CWE-22

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Backstage Backstage All All All All

References

ReferenceSourceLinkTags
scaffolder-backend: removed all usaged and prevent new usage of path.… · backstage/backstage@f9352ab · GitHub MISC github.com
Path Traversal in @backstage/plugin-scaffolder-backend fetch:template action · Advisory · backstage/backstage · GitHub CONFIRM github.com
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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