| Name | CVE-2025-27610 |
| Description | Rack provides an interface for developing web applications in Ruby. Prior to versions 2.2.13, 3.0.14, and 3.1.12, `Rack::Static` can serve files under the specified `root:` even if `urls:` are provided, which may expose other files under the specified `root:` unexpectedly. 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. 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. Versions 2.2.13, 3.0.14, and 3.1.12 contain a patch for the issue. Other mitigations include removing usage of `Rack::Static`, or ensuring 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4090-1, DSA-5886-1 |
| Debian Bugs | 1100444 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| ruby-rack (PTS) | bullseye | 2.1.4-3+deb11u2 | vulnerable |
| bullseye (security) | 2.1.4-3+deb11u3 | fixed | |
| bookworm | 2.2.6.4-1+deb12u1 | vulnerable | |
| bookworm (security) | 2.2.13-1~deb12u1 | fixed | |
| sid, trixie | 3.1.12-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| ruby-rack | source | bullseye | 2.1.4-3+deb11u3 | DLA-4090-1 | ||
| ruby-rack | source | bookworm | 2.2.13-1~deb12u1 | DSA-5886-1 | ||
| ruby-rack | source | (unstable) | 3.1.12-1 | 1100444 |
https://github.com/rack/rack/security/advisories/GHSA-7wqh-767x-r66v
Fixed by: https://github.com/rack/rack/commit/50caab74fa01ee8f5dbdee7bb2782126d20c6583 (main)
Fixed by: https://github.com/rack/rack/commit/70cb3228c755c2d066c108a9c59fbe67aff8e889 (v3.1.12)
Fixed by: https://github.com/rack/rack/commit/61f83f6336d3e59d1fa694c354c1ff17e80cefad (v3.0.14)
Fixed by: https://github.com/rack/rack/commit/873d39e6d673a91fbdeb2ec75d42184d35908bb4 (v2.2.13)