CVE-2019-19582

{"id": "CVE-2019-19582", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 2.1, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 2.0}]}, "published": "2019-12-11T18:16:19.537", "references": [{"url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00011.html", "source": "cve@mitre.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/34HBFTYNMQMWIO2GGK7DB6KV4M6R5YPV/", "source": "cve@mitre.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D5R73AYE53QA32KTMHUVKCX6E52CIS43/", "source": "cve@mitre.org"}, {"url": "https://seclists.org/bugtraq/2020/Jan/21", "source": "cve@mitre.org"}, {"url": "https://security.gentoo.org/glsa/202003-56", "source": "cve@mitre.org"}, {"url": "https://www.debian.org/security/2020/dsa-4602", "source": "cve@mitre.org"}, {"url": "https://xenbits.xen.org/xsa/advisory-307.html", "tags": ["Patch", "Vendor Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-835"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in Xen through 4.12.x allowing x86 guest OS users to cause a denial of service (infinite loop) because certain bit iteration is mishandled. In a number of places bitmaps are being used by the hypervisor to track certain state. Iteration over all bits involves functions which may misbehave in certain corner cases: On x86 accesses to bitmaps with a compile time known size of 64 may incur undefined behavior, which may in particular result in infinite loops. A malicious guest may cause a hypervisor crash or hang, resulting in a Denial of Service (DoS). All versions of Xen are vulnerable. x86 systems with 64 or more nodes are vulnerable (there might not be any such systems that Xen would run on). x86 systems with less than 64 nodes are not vulnerable."}, {"lang": "es", "value": "Se detect\u00f3 un problema en Xen versiones hasta 4.12.x, permitiendo a usuarios invitados del sistema operativo x86 causar una denegaci\u00f3n de servicio (bucle infinito) porque es manejada inapropiadamente cierta iteraci\u00f3n de bits. En varios lugares, el hipervisor est\u00e1 usando mapas de bits para rastrear cierto estado. La iteraci\u00f3n sobre todos los bits implica funciones que pueden comportarse inapropiadamente en ciertos casos de esquina: en x86, los accesos a mapas de bits con un tiempo de compilaci\u00f3n de un tama\u00f1o conocido de 64 pueden provocar un comportamiento indefinido, lo que en particular puede dar como resultado bucles infinitos. Un invitado malicioso puede provocar un bloqueo o bloqueo del hipervisor, resulta en una Denegaci\u00f3n de servicio (DoS). Todas las versiones de Xen son vulnerables. Los sistemas en x86 con 64 o m\u00e1s nodos son vulnerables (es posible que Xen no ejecute ninguno de esos sistemas). Los sistemas en x86 con menos de 64 nodos no son vulnerables."}], "lastModified": "2023-11-07T03:07:42.630", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EE89BA42-80AC-4EE2-B4A9-B201914641B6", "versionEndIncluding": "4.12.1", "versionStartIncluding": "4.8.0"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "80F0FA5D-8D3B-4C0E-81E2-87998286AF33"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}