CVE-2025-27610: Local File Inclusion in Rack::Static
First published: Mon Mar 10 2025(Updated: )
## 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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| rubygems/rack | >=3.1<3.1.12 | 3.1.12 |
| rubygems/rack | >=3.0<3.0.14 | 3.0.14 |
| rubygems/rack | <2.2.13 | 2.2.13 |
| debian/ruby-rack | <=2.1.4-3+deb11u2<=2.2.6.4-1+deb12u1 | 2.1.4-3+deb11u3 2.2.13-1~deb12u1 3.1.12-1 |
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Reference Links
- https://github.com/rack/rack/commit/50caab74fa01ee8f5dbdee7bb2782126d20c6583
- https://github.com/rack/rack/security/advisories/GHSA-7wqh-767x-r66v
- https://nvd.nist.gov/vuln/detail/CVE-2025-27610
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2025-27610.yml
- https://github.com/advisories/GHSA-7wqh-767x-r66v (Advisory)
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-27610
- https://launchpad.net/bugs/cve/CVE-2025-27610
- https://security-tracker.debian.org/tracker/CVE-2025-27610
- https://ubuntu.com/security/CVE-2025-27610
- https://github.com/rack/rack/commit/70cb3228c755c2d066c108a9c59fbe67aff8e889
- https://github.com/rack/rack/commit/61f83f6336d3e59d1fa694c354c1ff17e80cefad
- https://github.com/rack/rack/commit/873d39e6d673a91fbdeb2ec75d42184d35908bb4
- https://access.redhat.com/errata/RHSA-2025:3491
- https://access.redhat.com/errata/RHSA-2025:3492
- https://access.redhat.com/errata/RHSA-2025:3490
- https://access.redhat.com/errata/RHSA-2025:3906
- https://bugzilla.redhat.com/show_bug.cgi?id=2351231
Frequently Asked Questions
What is the severity of CVE-2025-27610?
CVE-2025-27610 has a severity rating that indicates it may expose unintended files, which can lead to information disclosure.
How do I fix CVE-2025-27610?
To fix CVE-2025-27610, upgrade to Rack versions 3.1.12, 3.0.14, or 2.2.13 and ensure proper path sanitization.
What versions of Rack are affected by CVE-2025-27610?
CVE-2025-27610 affects Rack versions prior to 3.1.12, 3.0.14, and all versions before 2.2.13.
What type of vulnerability is CVE-2025-27610?
CVE-2025-27610 is a path traversal vulnerability that arises from improper handling of file paths.
Can CVE-2025-27610 lead to data leakage?
Yes, CVE-2025-27610 can lead to data leakage by exposing files in the specified root that should not be accessible.
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