cve-2024-37891
Vulnerability from cvelistv5
Published
2024-06-17 19:18
Modified
2024-08-22 18:03
Severity ?
4.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
Summary
Proxy-Authorization request header isn't stripped during cross-origin redirects in urllib3
References
security-advisories@github.comhttps://github.com/urllib3/urllib3/commit/accff72ecc2f6cf5a76d9570198a93ac7c90270e
security-advisories@github.comhttps://github.com/urllib3/urllib3/security/advisories/GHSA-34jh-p97f-mpxf
Impacted products
urllib3urllib3
Show details on NVD website

To clipboard 

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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-37891\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2024-06-17T20:15:13.450\",\"lastModified\":\"2024-06-20T12:44:22.977\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\" urllib3 is a user-friendly HTTP client library for Python. When using urllib3\u0027s proxy support with `ProxyManager`, the `Proxy-Authorization` header is only sent to the configured proxy, as expected. However, when sending HTTP requests *without* using urllib3\u0027s proxy support, it\u0027s possible to accidentally configure the `Proxy-Authorization` header even though it won\u0027t have any effect as the request is not using a forwarding proxy or a tunneling proxy. In those cases, urllib3 doesn\u0027t treat the `Proxy-Authorization` HTTP header as one carrying authentication material and thus doesn\u0027t strip the header on cross-origin redirects. 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En esos casos, urllib3 no trata el encabezado HTTP \\\"Proxy-Authorization\\\" como si llevara material de autenticaci\u00f3n y, por lo tanto, no elimina el encabezado en redirecciones de origen cruzado. Dado que se trata de un escenario muy improbable, creemos que la gravedad de esta vulnerabilidad es baja para casi todos los usuarios. Por precauci\u00f3n, urllib3 eliminar\u00e1 autom\u00e1ticamente el encabezado \\\"Proxy-Authorization\\\" durante las redirecciones entre or\u00edgenes para evitar la peque\u00f1a posibilidad de que los usuarios hagan esto por accidente. Los usuarios deben usar el soporte de proxy de urllib3 o desactivar las redirecciones autom\u00e1ticas para lograr un procesamiento seguro del encabezado `Proxy-Authorization`, pero aun as\u00ed decidimos eliminar el encabezado de forma predeterminada para proteger a\u00fan m\u00e1s a los usuarios que no utilizan el enfoque correcto. Creemos que la cantidad de usos afectados por este aviso es baja. Requiere que todo lo siguiente sea cierto para ser explotado: 1. Configurar el encabezado `Proxy-Authorization` sin utilizar el soporte de proxy integrado de urllib3. 2. No deshabilitar las redirecciones HTTP. 3. Ya sea no utilizar un servidor de origen HTTPS o que el proxy o el origen de destino redirija a un origen malicioso. Se recomienda a los usuarios que actualicen a la versi\u00f3n 1.26.19 o a la versi\u00f3n 2.2.2. Los usuarios que no puedan actualizar pueden usar el encabezado `Proxy-Authorization` con `ProxyManager` de urllib3, deshabilitar las redirecciones HTTP usando `redirects=False` al enviar solicitudes o no usar el encabezado `Proxy-Authorization` como mitigaci\u00f3n.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\",\"baseScore\":4.4,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":0.7,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-669\"}]}],\"references\":[{\"url\":\"https://github.com/urllib3/urllib3/commit/accff72ecc2f6cf5a76d9570198a93ac7c90270e\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/urllib3/urllib3/security/advisories/GHSA-34jh-p97f-mpxf\",\"source\":\"security-advisories@github.com\"}]}}"
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}


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