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CVE-2025-27610

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Date: March 10, 2025

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.

Severity Score

Severity Score

Weakness Type (CWE)

Relative Path Traversal

CWE-23

Top Fix

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Upgrade to version rack - 2.2.13;rack - 3.0.14;rack - 3.1.12

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

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