CVE-2025-40777

{"id": "CVE-2025-40777", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "[email protected]", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2025-07-16T18:15:24.770", "references": [{"url": "https://kb.isc.org/docs/cve-2025-40777", "source": "[email protected]"}, {"url": "http://www.openwall.com/lists/oss-security/2025/07/16/6", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-617"}]}], "descriptions": [{"lang": "en", "value": "If a `named` caching resolver is configured with `serve-stale-enable` `yes`, and with `stale-answer-client-timeout` set to `0` (the only allowable value other than `disabled`), and if the resolver, in the process of resolving a query, encounters a CNAME chain involving a specific combination of cached or authoritative records, the daemon will abort with an assertion failure.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.10, 9.21.0 through 9.21.9, and 9.20.9-S1 through 9.20.10-S1."}, {"lang": "es", "value": "Si un solucionador de cach\u00e9 con nombre est\u00e1 configurado con `serve-stale-enable` `yes` y con `stale-answer-client-timeout` establecido en `0` (el \u00fanico valor permitido aparte de `disabled`), y si el solucionador, al resolver una consulta, encuentra una cadena CNAME que involucra una combinaci\u00f3n espec\u00edfica de registros en cach\u00e9 o autorizados, el daemon se interrumpir\u00e1 con un error de aserci\u00f3n. Este problema afecta a las versiones de BIND 9 de la 9.20.0 a la 9.20.10, de la 9.21.0 a la 9.21.9 y de la 9.20.9-S1 a la 9.20.10-S1."}], "lastModified": "2025-11-04T22:16:11.553", "sourceIdentifier": "[email protected]"}