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GHSA SYNC[rack]: 1 brand new advisory: CVE-2025-27610 #860

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Mar 11, 2025
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38 changes: 38 additions & 0 deletions gems/rack/CVE-2025-27610.yml
Original file line number Diff line number Diff line change
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---
gem: rack
cve: 2025-27610
ghsa: 7wqh-767x-r66v
url: https://github.com/rack/rack/security/advisories/GHSA-7wqh-767x-r66v
title: Local File Inclusion in Rack::Static
date: 2025-03-10
description: |-
## Summary

`Rack::Static` can serve files under the specified `root:` even if `urls:` are provided, which may expose other files under the specified `root:` unexpectedly.

## Details

The vulnerability occurs because `Rack::Static` does not properly sanitize user-supplied paths before serving files. Specifically, encoded path traversal sequences are not correctly validated, allowing attackers to access files outside the designated static file directory.

## Impact

By exploiting this vulnerability, an attacker can gain access to all files under the specified `root:` directory, provided they are able to determine then path of the file.

## Mitigation

- Update to the latest version of Rack, or
- Remove usage of `Rack::Static`, or
- Ensure that `root:` points at a directory path which only contains files which should be accessed publicly.

It is likely that a CDN or similar static file server would also mitigate the issue.
cvss_v3: 7.5
cvss_v4:
patched_versions:
- "~> 2.2.13"
- "~> 3.0.14"
- ">= 3.1.12"
related:
url:
- https://github.com/rack/rack/security/advisories/GHSA-7wqh-767x-r66v
- https://github.com/rack/rack/commit/50caab74fa01ee8f5dbdee7bb2782126d20c6583
- https://github.com/advisories/GHSA-7wqh-767x-r66v