Backstage TechDocs Path Traversal via Symbolic Link Validation Fix

Vulnerability Overview This vulnerability involves an issue with symbolic link validation in TechDocs. Specifically, TechDocs rejects source trees containing symbolic links that resolve outside the source directory during the build process. This flaw could potentially allow for path traversal attacks, where an attacker could exploit symbolic links to read arbitrary files on the host filesystem. Scope of Impact Affected Component: TechDocs Plugin Affected Versions: v1.54.0 to v1.54.6 Affected Scenario: When TechDocs processes source directories containing symbolic links that point to files outside the source directory, it may lead to path traversal attacks. Remediation 1. Code Modifications: - Added and functions in to validate symbolic links within the source and input directories. - Called these validation functions in to ensure that the source and input directories are validated during the build process. 2. Test Cases: - Added multiple test cases in to verify the correctness of the and functions. Proof of Concept (PoC) Code The following is the relevant PoC code block: Summary This vulnerability was addressed by adding symbolic link validation functions to ensure that TechDocs does not resolve files outside the source directory when processing source and input directories, thereby preventing path traversal attacks. The remediation includes code modifications and corresponding test cases to ensure the vulnerability is effectively mitigated.

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Backstage TechDocs Path Traversal via Symbolic Link Validation Fix

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