cve-2022-36083
Vulnerability from cvelistv5
Published
2022-09-07 21:55
Modified
2024-08-03 09:52
Severity
Summary
JOSE vulnerable to resource exhaustion via specifically crafted JWE
References
| Source | URL | Tags |
|---|---|---|
| security-advisories@github.com | https://github.com/panva/jose/commit/03d6d013bf6e070e85adfe5731f526978e3e8e4d | Patch, Third Party Advisory |
| security-advisories@github.com | https://github.com/panva/jose/releases/tag/v4.9.2 | Third Party Advisory |
| security-advisories@github.com | https://github.com/panva/jose/security/advisories/GHSA-jv3g-j58f-9mq9 | Exploit, Third Party Advisory |
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El prop\u00f3sito de este par\u00e1metro es ralentizar intencionadamente la funci\u00f3n de derivaci\u00f3n de la clave para que los ataques de fuerza bruta y de diccionario a las contrase\u00f1as sean m\u00e1s costosos. Esto hace que los algoritmos PBES2 sean inapropiados para situaciones en las que el JWE procede de una fuente no confiable: un adversario puede elegir intencionadamente un valor de PBES2 Count extremadamente alto, que iniciar\u00e1 un c\u00e1lculo limitado por la CPU que puede tardar una cantidad de tiempo irrazonable en terminar. Bajo determinadas condiciones, es posible que el entorno del usuario consuma una cantidad irrazonable de tiempo de CPU. El impacto es limitado s\u00f3lo a usuarios que usan las API de descifrado de JWE con secretos sim\u00e9tricos para descifrar JWE de partes no confiables que no limitan los algoritmos de administraci\u00f3n de claves JWE aceptados (par\u00e1metro de cabecera \\\"alg\\\") usando la opci\u00f3n de descifrado \\\"keyManagementAlgorithms\\\" (o \\\"algorithms\\\" en v1.x) o por otros medios. Las versiones \\\"v1.28.2\\\", \\\"v2.0.6\\\", \\\"v3.20.4\\\" y \\\"v4.9.2\\\" limitan el n\u00famero m\u00e1ximo de iteraciones de PBKDF2 a \\\"10000\\\" por defecto. Es posible ajustar este l\u00edmite con la nueva opci\u00f3n de descifrado \\\"maxPBES2Count\\\". Si los usuarios no pueden actualizar la versi\u00f3n de la biblioteca que necesitan, se presentan dos opciones dependiendo de si esperan recibir JWEs que usen alguno de los tres algoritmos de administraci\u00f3n de claves JWE basados en PBKDF2. 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