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GHSA-29gx-h2m3-xw44
@backstage/plugin-scaffolder-backend-module-bitbucket-server@backstage/plugin-scaffolder-backend-module-gitlab@backstage/plugin-scaffolder-backendImpact
Scaffolder actions that interact with source control systems may not consistently enforce the intended credential boundaries under certain configurations. An authenticated user could perform operations with broader access than intended.
Patches
@backstage/plugin-scaffolder-backendversion4.1.0@backstage/plugin-scaffolder-backend-module-azureversion0.2.25@backstage/plugin-scaffolder-backend-module-bitbucket-cloudversion0.3.10@backstage/plugin-scaffolder-backend-module-bitbucket-serverversion0.2.25@backstage/plugin-scaffolder-backend-module-githubversion0.9.13@backstage/plugin-scaffolder-backend-module-gitlabversion0.11.10
The fix introduces a new configuration option that enforces user-provided credentials for supported SCM actions. The new behavior is opt-in for compatibility. After upgrading, set:
scaffolder:
requireScmUserCredentials: true
Before enabling this setting, review and update your templates as described in the software templates documentation referred to below.
Workarounds
If you cannot upgrade and enable the setting immediately:
- Restrict who can create Scaffolder tasks and which templates they can execute.
- Limit SCM integration credentials to the minimum repository read and mutation permissions required.
- Remove integration credentials for SCM hosts where all required operations can use explicitly supplied user tokens.
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The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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