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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*", "matchCriteriaId": "7494A471-EEFC-44F4-96B1-FDBA3B780313", "versionEndIncluding": "4.8.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Xen through 4.8.x does not validate memory allocations during certain P2M operations, which allows guest OS users to obtain privileged host OS access, aka XSA-222."}, {"lang": "es", "value": "Xen, hasta las versiones 4.8.x, no valida las asignaciones de memoria durante ciertas operaciones de P2M, lo que permite que los usuarios invitados del sistema operativo obtengan acceso privilegiado al sistema operativo. Esto tambi\u00e9n se conoce como XSA-222."}], "id": "CVE-2017-10918", "lastModified": "2026-05-13T00:24:29.033", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 10.0, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-07-05T01:29:00.767", "references": [{"source": "cve@mitre.org", "url": "http://www.debian.org/security/2017/dsa-3969"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/99161"}, {"source": "cve@mitre.org", "url": "http://www.securitytracker.com/id/1038732"}, {"source": "cve@mitre.org", "url": "https://security.gentoo.org/glsa/201708-03"}, {"source": "cve@mitre.org", "url": "https://security.gentoo.org/glsa/201710-17"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Mitigation", "Third Party Advisory"], "url": "https://xenbits.xen.org/xsa/advisory-222.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.debian.org/security/2017/dsa-3969"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/99161"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securitytracker.com/id/1038732"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/201708-03"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/201710-17"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Mitigation", "Third Party Advisory"], "url": "https://xenbits.xen.org/xsa/advisory-222.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Julien Grall (ARM) as the original reporter.", "bugzilla": {"description": "xen: stale P2M mappings due to insufficient error checking (XSA-222)", "id": "1458876", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1458876"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.5", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "details": ["Xen through 4.8.x does not validate memory allocations during certain P2M operations, which allows guest OS users to obtain privileged host OS access, aka XSA-222."], "mitigation": {"lang": "en:us", "value": "On x86, specifying \"hap_1gb=0 hap_2mb=0\" on the hypervisor command\nline will avoid the vulnerability.\nAlternatively, running all x86 HVM guests in shadow mode will also\navoid this vulnerability. (For example, by specifying \"hap=0\" in the\nxl domain configuration file.)\nThere is no known mitigation on ARM systems."}, "name": "CVE-2017-10918", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "xen", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2017-06-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-10918\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-10918\nhttp://xenbits.xen.org/xsa/advisory-222.html"], "threat_severity": "Important"}

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