CVE-2021-38598

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*", "matchCriteriaId": "19960486-0F45-4640-AC10-CC48A25F8309", "versionEndExcluding": "16.4.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*", "matchCriteriaId": "1AB8E7F9-5593-4EC1-BCD4-B5A7061274DD", "versionEndExcluding": "17.1.3", "versionStartIncluding": "17.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:openstack:neutron:18.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "F0D3CE94-058D-41F4-B7F9-463375904E1D", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the hardware addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations."}, {"lang": "es", "value": "OpenStack Neutron versiones anteriores a 16.4.1, 17.x versiones anteriores a 17.1.3 y 18.0.0, permite una suplantaci\u00f3n de direcciones de hardware cuando es usado el controlador linuxbridge con ebtables-nft en una plataforma basada en Netfilter. Mediante el env\u00edo de paquetes cuidadosamente dise\u00f1ados, cualquier persona que controle una instancia de servidor conectada al conmutador virtual puede suplantar las direcciones de hardware de otros sistemas en la red, resultando en una denegaci\u00f3n de servicio o, en algunos casos, a una posible interceptaci\u00f3n del tr\u00e1fico previsto para otros destinos."}], "id": "CVE-2021-38598", "lastModified": "2026-06-17T04:02:25.337", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.8, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-08-23T05:15:08.193", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://launchpad.net/bugs/1938670"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://launchpad.net/bugs/1938670"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-290"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "openstack-neutron: Linuxbridge ARP filter bypass on Netfilter platforms", "id": "1995273", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1995273"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H", "status": "draft"}, "cwe": "CWE-290", "details": ["OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the hardware addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations.", "A vulnerability was found in neutron's Linux bridge driver on newer Netfilter-based platforms. This flaw allows a malicious user in control of a server instance connected to the virtual switch to send a crafted packet and impersonate hardware addresses of other systems on the network. The highest threat from this vulnerability is to system availability, but could also result in the interception of traffic intended for other destinations."], "name": "CVE-2021-38598", "package_state": [{"cpe": "cpe:/a:redhat:openstack:10", "fix_state": "Not affected", "package_name": "openstack-neutron", "product_name": "Red Hat OpenStack Platform 10 (Newton)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Not affected", "package_name": "openstack-neutron", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:16.1", "fix_state": "Not affected", "package_name": "openstack-neutron", "product_name": "Red Hat OpenStack Platform 16.1"}, {"cpe": "cpe:/a:redhat:openstack:16.2", "fix_state": "Not affected", "package_name": "openstack-neutron", "product_name": "Red Hat OpenStack Platform 16.2"}], "public_date": "2021-08-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-38598\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-38598\nhttps://seclists.org/oss-sec/2021/q3/107"], "statement": "Only deployments using the Linux bridge driver with ebtables-nft are affected.", "threat_severity": "Moderate"}

{}