CVE-2018-12893

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:x86", "matchCriteriaId": "C060EAC6-B637-4E6A-AA09-B868E50A6665", "versionEndIncluding": "4.10.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users."}, {"lang": "es", "value": "Se ha descubierto un problema en Xen hasta las versiones 4.10.x. Una de las correcciones en XSA-260 agreg\u00f3 algunas comprobaciones de seguridad para ayudar a evitar el livelocking de Xen con excepciones de depuraci\u00f3n. Desafortunadamente, debido a un descuido, al menos uno de estos controles de seguridad puede ser activado por un invitado. Un invitado PV malicioso puede bloquear Xen, lo que conduce a una denegaci\u00f3n de servicio (DoS). Todos los sistemas Xen que han aplicado la correcci\u00f3n XSA-260 son vulnerables. S\u00f3lo los sistemas x86 son vulnerables. Los sistemas ARM no son vulnerables. S\u00f3lo los invitados PV x86 pueden explotar la vulnerabilidad. Los invitados HVM y PVH x86 no pueden explotar la vulnerabilidad. Un atacante necesita ser capaz de controlar las instalaciones de depuraci\u00f3n de hardware para explotar la vulnerabilidad, pero estos permisos suelen estar disponibles para usuarios no privilegiados."}], "id": "CVE-2018-12893", "lastModified": "2026-06-17T01:38:31.640", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 2.1, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 2.0, "impactScore": 4.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-07-02T17:29:00.583", "references": [{"source": "cve@mitre.org", "tags": ["Mailing List", "Mitigation", "Patch", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2018/06/27/11"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/104572"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1041202"}, {"source": "cve@mitre.org", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "url": "http://xenbits.xen.org/xsa/advisory-265.html"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Mitigation", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1590979"}, {"source": "cve@mitre.org", "url": "https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html"}, {"source": "cve@mitre.org", "url": "https://security.gentoo.org/glsa/201810-06"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://support.citrix.com/article/CTX235748"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2018/dsa-4236"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Mitigation", "Patch", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2018/06/27/11"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/104572"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1041202"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "url": "http://xenbits.xen.org/xsa/advisory-265.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Mitigation", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1590979"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/201810-06"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://support.citrix.com/article/CTX235748"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2018/dsa-4236"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "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 DB exception safety check can be triggered by a guest (XSA-265)", "id": "1590979", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1590979"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-266", "details": ["An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users."], "name": "CVE-2018-12893", "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": "2018-06-27T21:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2018-12893\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-12893"], "threat_severity": "Moderate"}

{}