CVE-2021-28706

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-28706", "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "assignerShortName": "XEN", "dateUpdated": "2024-08-03T21:47:33.187Z", "dateReserved": "2021-03-18T00:00:00.000Z", "datePublished": "2021-11-24T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "shortName": "XEN", "dateUpdated": "2024-02-04T08:06:49.398Z"}, "descriptions": [{"lang": "en", "value": "guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound."}], "affected": [{"vendor": "Xen", "product": "xen", "versions": [{"version": "4.12.x", "status": "affected"}]}, {"vendor": "Xen", "product": "xen", "versions": [{"version": "unspecified", "lessThan": "4.12", "status": "unknown", "versionType": "custom"}, {"version": "4.14.x", "status": "affected", "lessThan": "unspecified", "versionType": "custom"}, {"version": "next of 4.15.x", "status": "unaffected", "lessThan": "unspecified", "versionType": "custom"}]}, {"vendor": "Xen", "product": "xen", "versions": [{"version": "xen-unstable", "status": "affected"}]}, {"vendor": "Xen", "product": "xen", "versions": [{"version": "4.13.x", "status": "affected"}]}], "references": [{"url": "https://xenbits.xenproject.org/xsa/advisory-385.txt"}, {"name": "FEDORA-2021-03645e9807", "tags": ["vendor-advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/"}, {"name": "DSA-5017", "tags": ["vendor-advisory"], "url": "https://www.debian.org/security/2021/dsa-5017"}, {"name": "FEDORA-2021-2b3a2de94f", "tags": ["vendor-advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/"}, {"name": "GLSA-202402-07", "tags": ["vendor-advisory"], "url": "https://security.gentoo.org/glsa/202402-07"}], "credits": [{"lang": "en", "value": "{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Julien Grall of Amazon.'}]}}}"}], "metrics": [{"other": {"type": "unknown", "content": {"description": {"description_data": [{"lang": "eng", "value": "A guest may be able too allocate unbounded amounts of memory to itself.\nThis may result in a Denial of Service (DoS) affecting the entire host."}]}}}}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "unknown"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T21:47:33.187Z"}, "title": "CVE Program Container", "references": [{"url": "https://xenbits.xenproject.org/xsa/advisory-385.txt", "tags": ["x_transferred"]}, {"name": "FEDORA-2021-03645e9807", "tags": ["vendor-advisory", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/"}, {"name": "DSA-5017", "tags": ["vendor-advisory", "x_transferred"], "url": "https://www.debian.org/security/2021/dsa-5017"}, {"name": "FEDORA-2021-2b3a2de94f", "tags": ["vendor-advisory", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/"}, {"name": "GLSA-202402-07", "tags": ["vendor-advisory", "x_transferred"], "url": "https://security.gentoo.org/glsa/202402-07"}]}]}}

{}

{"affected": [{"affectedData": [{"product": "xen", "vendor": "Xen", "versions": [{"status": "affected", "version": "4.12.x"}]}, {"product": "xen", "vendor": "Xen", "versions": [{"lessThan": "4.12", "status": "unknown", "version": "unspecified", "versionType": "custom"}, {"lessThan": "unspecified", "status": "affected", "version": "4.14.x", "versionType": "custom"}, {"lessThan": "unspecified", "status": "unaffected", "version": "next of 4.15.x", "versionType": "custom"}]}, {"product": "xen", "vendor": "Xen", "versions": [{"status": "affected", "version": "xen-unstable"}]}, {"product": "xen", "vendor": "Xen", "versions": [{"status": "affected", "version": "4.13.x"}]}], "source": "security@xen.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*", "matchCriteriaId": "1C6CF6CF-FA02-40B4-A285-167C1F8CE5C4", "versionEndExcluding": "4.12", "versionStartIncluding": "3.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*", "matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound."}, {"lang": "es", "value": "Los hu\u00e9spedes pueden exceder su l\u00edmite de memoria designado Cuando a un hu\u00e9sped se le permite tener cerca de 16TiB de memoria, puede ser capaz de emitir hypercalls para aumentar su asignaci\u00f3n de memoria m\u00e1s all\u00e1 del l\u00edmite establecido por el administrador. Esto es el resultado de un c\u00e1lculo realizado con precisi\u00f3n de 32 bits, que puede desbordarse. En ese caso, s\u00f3lo el n\u00famero desbordado (y por tanto peque\u00f1o) se comparar\u00e1 con el l\u00edmite superior establecido"}], "id": "CVE-2021-28706", "lastModified": "2026-06-17T03:46:50.523", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-11-24T01:15:08.127", "references": [{"source": "security@xen.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/"}, {"source": "security@xen.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/"}, {"source": "security@xen.org", "url": "https://security.gentoo.org/glsa/202402-07"}, {"source": "security@xen.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-5017"}, {"source": "security@xen.org", "tags": ["Mitigation", "Patch", "Third Party Advisory"], "url": "https://xenbits.xenproject.org/xsa/advisory-385.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/202402-07"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-5017"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Patch", "Third Party Advisory"], "url": "https://xenbits.xenproject.org/xsa/advisory-385.txt"}], "sourceIdentifier": "security@xen.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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