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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": "The shadow-paging feature in Xen through 4.8.x mismanages page references and consequently introduces a race condition, which allows guest OS users to obtain Xen privileges, aka XSA-219."}, {"lang": "es", "value": "La caracter\u00edstica de shadow-paging en Xen, hasta las versiones 4.8.x, gestiona de manera incorrecta referencias de p\u00e1ginas y, en consecuencia, introduce una condici\u00f3n de carrera, lo que permite que los usuarios invitados del sistema operativo obtengan privilegios Xen. Esto tambi\u00e9n se conoce como XSA-219."}], "id": "CVE-2017-10915", "lastModified": "2017-11-04T01:29:31.820", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-07-05T01:29:00.673", "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/99174"}, {"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", "Vendor Advisory"], "url": "https://xenbits.xen.org/xsa/advisory-219.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Andrew Cooper (Citrix) as the original reporter.", "bugzilla": {"description": "xen: x86: insufficient reference counts during shadow emulation (XSA-219)", "id": "1458873", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1458873"}, "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": ["The shadow-paging feature in Xen through 4.8.x mismanages page references and consequently introduces a race condition, which allows guest OS users to obtain Xen privileges, aka XSA-219."], "mitigation": {"lang": "en:us", "value": "Where the HVM guest is explicitly configured to use shadow paging (eg\nvia the `hap=0' xl domain configuration file parameter), changing to\nHAP (eg by setting `hap=1') will avoid exposing the vulnerability to\nthose guests. HAP is the default (in upstream Xen), where the\nhardware supports it; so this mitigation is only applicable if HAP has\nbeen disabled by configuration.\n(This mitigation is not applicable to PV guests.)"}, "name": "CVE-2017-10915", "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-2017-10915\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-10915\nhttp://xenbits.xen.org/xsa/advisory-219.html"], "threat_severity": "Important"}