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233 lines
7.9 KiB
JSON
233 lines
7.9 KiB
JSON
{
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"id": "CVE-2020-25686",
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"sourceIdentifier": "secalert@redhat.com",
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"published": "2021-01-20T17:15:13.000",
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"lastModified": "2023-11-07T03:20:22.280",
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"vulnStatus": "Modified",
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"descriptions": [
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{
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"lang": "en",
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"value": "A flaw was found in dnsmasq before version 2.83. When receiving a query, dnsmasq does not check for an existing pending request for the same name and forwards a new request. By default, a maximum of 150 pending queries can be sent to upstream servers, so there can be at most 150 queries for the same name. This flaw allows an off-path attacker on the network to substantially reduce the number of attempts that it would have to perform to forge a reply and have it accepted by dnsmasq. This issue is mentioned in the \"Birthday Attacks\" section of RFC5452. If chained with CVE-2020-25684, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity."
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},
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{
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"lang": "es",
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"value": "Se encontr\u00f3 un fallo en dnsmasq versiones anteriores a 2.83. Al recibir una consulta, dnsmasq no comprueba si existe una petici\u00f3n pendiente existente para el mismo nombre y reenv\u00eda una nueva petici\u00f3n. Por defecto, se puede enviar un m\u00e1ximo de 150 consultas pendientes a los servidores aguas arriba, por lo que puede haber como m\u00e1ximo 150 consultas para el mismo nombre. Este fallo permite a un atacante fuera de ruta en la red reduzca sustancialmente el n\u00famero de intentos que tendr\u00eda que realizar para falsificar una respuesta y hacer que dnsmasq la acepte. Este problema se menciona en la secci\u00f3n \"Birthday Attacks\" de RFC5452. Si se encadenaba con CVE-2020-25684, 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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}
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],
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"attackVector": "NETWORK",
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"attackComplexity": "HIGH",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "NONE",
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"integrityImpact": "LOW",
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"availabilityImpact": "NONE",
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"baseScore": 3.7,
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"baseSeverity": "LOW"
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"exploitabilityScore": 2.2,
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"accessVector": "NETWORK",
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"accessComplexity": "MEDIUM",
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"authentication": "NONE",
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"integrityImpact": "PARTIAL",
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"baseScore": 4.3
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"value": "CWE-358"
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"value": "CWE-290"
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"references": [
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{
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1890125",
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"Third Party Advisory"
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