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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."], "mitigation": {"lang": "en:us", "value": "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."}, "name": "CVE-2025-27610", "package_state": [{"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp-zync-container", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "pcs", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "pcs", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "pcs", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "pcs", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "satellite:el8/rubygem-rack", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:storage:3", "fix_state": "Affected", "package_name": "rubygem-rack", "product_name": "Red Hat Storage 3"}], "public_date": "2025-03-10T22:19:25Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-27610\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-27610\nhttps://github.com/rack/rack/commit/50caab74fa01ee8f5dbdee7bb2782126d20c6583\nhttps://github.com/rack/rack/security/advisories/GHSA-7wqh-767x-r66v"], "statement": "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\u2014like credentials, configs, or source code\u2014can be exposed. The flaw breaks expected isolation between public and private files, and since it\u2019s exploitable remotely without authentication, the impact is far more severe than a moderate issue.\nPCS does not use Rack::StaticHandler to serve files; static files are served by Tornado.", "threat_severity": "Important"}

{}