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nvd-json-data-feeds/CVE-2020/CVE-2020-256xx/CVE-2020-25684.json
René Helmke 7791f18b51 bootstrap
2023-05-16 16:09:41 +02:00

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{
"id": "CVE-2020-25684",
"sourceIdentifier": "secalert@redhat.com",
"published": "2021-01-20T16:15:14.163",
"lastModified": "2022-02-14T14:56:05.230",
"vulnStatus": "Analyzed",
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in the forward.c:reply_query() if the reply destination address/port is used by the pending forwarded queries. However, it does not use the address/port to retrieve the exact forwarded query, substantially reducing the number of attempts an attacker on the network would have to perform to forge a reply and get it accepted by dnsmasq. This issue contrasts with RFC5452, which specifies a query's attributes that all must be used to match a reply. This flaw allows an attacker to perform a DNS Cache Poisoning attack. If chained with CVE-2020-25685 or CVE-2020-25686, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity."
},
{
"lang": "es",
"value": "Se encontr\u00f3 un fallo en dnsmasq versiones anteriores a 2.83. Al obtener una respuesta de una consulta reenviada, dnsmasq comprueba en forward.c:reply_query() si la direcci\u00f3n y puerto de destino de la respuesta es utilizado por las consultas reenviadas pendientes. Sin embargo, no usa la direcci\u00f3n y puerto para recuperar la consulta reenviada exacta, lo que reduce sustancialmente la cantidad de intentos que un atacante en la red tendr\u00eda que realizar para falsificar una respuesta y lograr que dnsmasq la acepte. Este problema contrasta con RFC5452, que especifica los atributos de una consulta que deben ser usados para hacer coincidir una respuesta. Este fallo permite a un atacante realizar un ataque de envenenamiento de cach\u00e9 de DNS. Si est\u00e1 encadenado con CVE-2020-25685 o CVE-2020-25686, se reduce la complejidad del ataque de un ataque con \u00e9xito. La mayor amenaza de esta vulnerabilidad es la integridad de los datos"
}
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"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"availabilityImpact": "NONE",
"baseScore": 3.7,
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}
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