CVE-2021-22161

{"id": "CVE-2021-22161", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 3.3, "accessVector": "ADJACENT_NETWORK", "vectorString": "AV:A/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 6.5, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:A/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": 2.8}]}, "published": "2021-02-07T23:15:12.273", "references": [{"url": "https://openwrt.org/advisory/2021-02-02-1", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://openwrt.org/advisory/2021-02-02-1", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-835"}]}], "descriptions": [{"lang": "en", "value": "In OpenWrt 19.07.x before 19.07.7, when IPv6 is used, a routing loop can occur that generates excessive network traffic between an affected device and its upstream ISP's router. This occurs when a link prefix route points to a point-to-point link, a destination IPv6 address belongs to the prefix and is not a local IPv6 address, and a router advertisement is received with at least one global unique IPv6 prefix for which the on-link flag is set. This affects the netifd and odhcp6c packages."}, {"lang": "es", "value": "En OpenWrt versiones 19.07.x anteriores a 19.07.7, cuando es usado IPv6, puede ocurrir un bucle de enrutamiento que genere un tr\u00e1fico de red excesivo entre un dispositivo afectado y el enrutador de su ISP ascendente. Esto ocurre cuando una ruta de prefijo de enlace apunta a un enlace de punto a punto, una direcci\u00f3n IPv6 de destino pertenece al prefijo y no es una direcci\u00f3n IPv6 local, y se recibe un anuncio de enrutamiento con al menos un prefijo IPv6 \u00fanico global para el que es ajustado el flag on-link. Esto afecta a los paquetes netifd y odhcp6c"}], "lastModified": "2024-11-21T05:49:37.600", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B9B137F0-E0CB-426E-AB76-3B1FC53097DE", "versionEndIncluding": "19.07.6", "versionStartIncluding": "19.07.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}