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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*", "matchCriteriaId": "216B1C01-EDB2-43CA-822C-F4959DA6D76D", "versionEndIncluding": "4.9.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode."}, {"lang": "es", "value": "Se ha descubierto un problema en Xen hasta las versiones 4.9.x que permite que usuarios invitados del sistema operativo provoquen una denegaci\u00f3n de servicio (cierre inesperado del host del sistema operativo) u obtengan privilegios del host del sistema operativo aprovechando una comprobaci\u00f3n de desbordamiento de m\u00e1scara incorrecta para conteo de referencias en modo shadow."}], "id": "CVE-2017-17563", "lastModified": "2026-05-13T00:24:29.033", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 6.9, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.4, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 1.1, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-12-12T23:29:00.300", "references": [{"source": "cve@mitre.org", "tags": ["Mailing List"], "url": "http://www.openwall.com/lists/oss-security/2017/12/12/2"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/bid/102169"}, {"source": "cve@mitre.org", "url": "http://www.securitytracker.com/id/1040769"}, {"source": "cve@mitre.org", "url": "https://lists.debian.org/debian-lts-announce/2018/01/msg00003.html"}, {"source": "cve@mitre.org", "url": "https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html"}, {"source": "cve@mitre.org", "url": "https://security.gentoo.org/glsa/201801-14"}, {"source": "cve@mitre.org", "url": "https://support.citrix.com/article/CTX232096"}, {"source": "cve@mitre.org", "url": "https://www.debian.org/security/2018/dsa-4112"}, {"source": "cve@mitre.org", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "url": "https://xenbits.xen.org/xsa/advisory-249.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "http://www.openwall.com/lists/oss-security/2017/12/12/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/bid/102169"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securitytracker.com/id/1040769"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2018/01/msg00003.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/201801-14"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.citrix.com/article/CTX232096"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.debian.org/security/2018/dsa-4112"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "url": "https://xenbits.xen.org/xsa/advisory-249.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Jan Beulich (SUSE) as the original reporter.", "bugzilla": {"description": "xen: broken x86 shadow mode refcount overflow check (XSA-249)", "id": "1518657", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1518657"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "details": ["An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode."], "name": "CVE-2017-17563", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "xen", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2017-12-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-17563\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-17563\nhttp://xenbits.xen.org/xsa/advisory-249.html"], "threat_severity": "Important"}

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