Описание
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.
A flaw was found in RackRubygems, where 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. This flaw allows an attacker to gain access to all files under the specified root directory, provided they can determine the file's path.
Отчет
This is an Important vulnerability because it allows attackers to bypass urls: restrictions and access unintended files under the root: directory using encoded path traversal. Since Rack::Static is often used to serve public assets, any sensitive files within the same root—like credentials, configs, or source code—can be exposed. The flaw breaks expected isolation between public and private files, and since it’s exploitable remotely without authentication, the impact is far more severe than a moderate issue.
PCS does not use Rack::StaticHandler to serve files; static files are served by Tornado.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat 3scale API Management Platform 2 | 3scale-amp-zync-container | Affected | ||
| Red Hat Enterprise Linux 10 | pcs | Not affected | ||
| Red Hat Enterprise Linux 7 | pcs | Not affected | ||
| Red Hat Enterprise Linux 8 | pcs | Not affected | ||
| Red Hat Enterprise Linux 9 | pcs | Not affected | ||
| Red Hat Satellite 6 | satellite:el8/rubygem-rack | Affected | ||
| Red Hat Storage 3 | rubygem-rack | Affected | ||
| Red Hat Satellite 6.14 for RHEL 8 | rubygem-rack | Fixed | RHSA-2025:3492 | 01.04.2025 |
| Red Hat Satellite 6.14 for RHEL 8 | rubygem-rack | Fixed | RHSA-2025:3492 | 01.04.2025 |
| Red Hat Satellite 6.15 for RHEL 8 | rubygem-rack | Fixed | RHSA-2025:3491 | 01.04.2025 |
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Дополнительная информация
Статус:
7.5 High
CVSS3
Связанные уязвимости
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 s...
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 stat
Rack provides an interface for developing web applications in Ruby. Pr ...
Уязвимость класса Rack::Static модульного интерфейса между веб-серверами и веб-приложениями Rack, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации
7.5 High
CVSS3