CVE-2023-41338

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This issue impacts users of our project who rely on the `ctx.IsFromLocal` method to restrict access to localhost requests. If exploited, it could allow unauthorized access to resources intended only for localhost. Setting `X-Forwarded-For: 127.0.0.1` in a request from a foreign host, will result in true for `ctx.IsFromLocal`. Access is limited to the scope of the affected process. This issue has been patched in version `2.49.2` with commit `b8c9ede6`. Users are advised to upgrade. There are no known workarounds to remediate this vulnerability without upgrading to the patched version. "}, {"lang": "es", "value": "Fiber es un framework web inspirado en Express creado en el lenguaje Go. Las versiones de gofiber anteriores a la 2.49.2 no restring\u00edan adecuadamente el acceso a localhost. Este problema afecta a los usuarios de nuestro proyecto que dependen del m\u00e9todo `ctx.IsFromLocal` para restringir el acceso a las solicitudes de localhost. Si se explota, podr\u00eda permitir el acceso no autorizado a recursos destinados \u00fanicamente a localhost. Configurar `X-Forwarded-For: 127.0.0.1` en una solicitud de un host externo dar\u00e1 como resultado verdadero para `ctx.IsFromLocal`. El acceso est\u00e1 limitado al alcance del proceso afectado. Este problema se solucion\u00f3 en la versi\u00f3n `2.49.2` con el commit `b8c9ede6`. Se recomienda a los usuarios que actualicen. No se conocen soluciones para remediar esta vulnerabilidad sin actualizar a la versi\u00f3n parcheada."}], "id": "CVE-2023-41338", "lastModified": "2026-06-17T06:21:51.730", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-41338", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-26T13:59:21.650864Z", "version": "2.0.3"}}]}, "published": "2023-09-08T19:15:43.977", "references": [{"source": "security-advisories@github.com", "tags": ["Technical Description"], "url": "https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For"}, {"source": "security-advisories@github.com", "tags": ["Product"], "url": "https://docs.gofiber.io/api/ctx#isfromlocal"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/gofiber/fiber/commit/b8c9ede6efa231116c4bd8bb9d5e03eac1cb76dc"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/gofiber/fiber/security/advisories/GHSA-3q5p-3558-364f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Technical Description"], "url": "https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product"], "url": "https://docs.gofiber.io/api/ctx#isfromlocal"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/gofiber/fiber/commit/b8c9ede6efa231116c4bd8bb9d5e03eac1cb76dc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://github.com/gofiber/fiber/security/advisories/GHSA-3q5p-3558-364f"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-670"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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