Bug 2316342 (CVE-2024-47762)

Summary: CVE-2024-47762 backstage/plugin-app-backend: Unexpected visibility of environment variable configurations in @backstage/plugin-app-backend
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jchui, ktsao, nboldt, rtaniwa, tkral
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Hardware: All   
OS: Linux   
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A flaw was found in the backstage/plugin-app-backend package. Configurations supplied through APP_CONFIG_* environment variables unexpectedly ignore the visibility defined in the configuration schema, potentially exposing sensitive configuration details intended to remain private or restricted to backend processes.
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Description OSIDB Bzimport 2024-10-03 18:01:38 UTC 
Backstage is an open framework for building developer portals. Configuration supplied through APP_CONFIG_* environment variables, for example APP_CONFIG_backend_listen_port=7007, where unexpectedly ignoring the visibility defined in configuration schema. This occurred even if the configuration schema specified that they should have backend or secret visibility. This was an intended feature of the APP_CONFIG_* way of supplying configuration, but now clearly goes against the expected behavior of the configuration system. This behavior leads to a risk of potentially exposing sensitive configuration details intended to remain private or restricted to backend processes. The issue has been resolved in version 0.3.75 of the @backstage/plugin-app-backend package. As a temporary measure, avoid supplying secrets using the APP_CONFIG_ configuration pattern. Consider alternative methods for setting secrets, such as the environment substitution available for Backstage configuration.