CVE-2020-2732

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{"affected": [{"affectedData": [{"product": "Oracle Linux", "vendor": "Oracle Corporation", "versions": [{"status": "affected", "version": "7"}, {"status": "affected", "version": "6"}]}], "source": "secalert_us@oracle.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest."}, {"lang": "es", "value": "Se detect\u00f3 un fallo en la manera en que el hipervisor de KVM manej\u00f3 la emulaci\u00f3n de instrucciones para un invitado L2 cuando la virtualizaci\u00f3n anidada est\u00e1 habilitada. En algunas circunstancias, un invitado L2 puede enga\u00f1ar al invitado L0 para que acceda a recursos L1 confidenciales que deber\u00edan estar inaccesibles para el invitado L2."}], "id": "CVE-2020-2732", "lastModified": "2026-06-17T03:12:46.813", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "ADJACENT_NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 2.3, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:A/AC:M/Au:S/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 4.4, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 4.0, "source": "secalert_us@oracle.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 4.0, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2020-2732", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-30T15:00:48.809812Z", "version": "2.0.3"}}]}, "published": "2020-04-08T22:15:12.263", "references": [{"source": "secalert_us@oracle.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1805135"}, {"source": "secalert_us@oracle.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec"}, {"source": "secalert_us@oracle.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c"}, {"source": "secalert_us@oracle.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d"}, {"source": "secalert_us@oracle.com", "tags": ["Third Party Advisory"], "url": "https://linux.oracle.com/errata/ELSA-2020-5540.html"}, {"source": "secalert_us@oracle.com", "tags": ["Third Party Advisory"], "url": "https://linux.oracle.com/errata/ELSA-2020-5542.html"}, {"source": "secalert_us@oracle.com", "tags": ["Third Party Advisory"], "url": "https://linux.oracle.com/errata/ELSA-2020-5543.html"}, {"source": "secalert_us@oracle.com", "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html"}, {"source": "secalert_us@oracle.com", "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html"}, {"source": "secalert_us@oracle.com", "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html"}, {"source": "secalert_us@oracle.com", "url": "https://www.debian.org/security/2020/dsa-4667"}, {"source": "secalert_us@oracle.com", "url": "https://www.debian.org/security/2020/dsa-4698"}, {"source": "secalert_us@oracle.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2020/02/25/3"}, {"source": "secalert_us@oracle.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.spinics.net/lists/kvm/msg208259.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1805135"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://linux.oracle.com/errata/ELSA-2020-5540.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://linux.oracle.com/errata/ELSA-2020-5542.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://linux.oracle.com/errata/ELSA-2020-5543.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.debian.org/security/2020/dsa-4667"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.debian.org/security/2020/dsa-4698"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2020/02/25/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.spinics.net/lists/kvm/msg208259.html"}], "sourceIdentifier": "secalert_us@oracle.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "This issue was discovered by Paolo Bonzini (Red Hat).", "affected_release": [{"advisory": "RHSA-2020:4062", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-1160.rt56.1131.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-09-29T00:00:00Z"}, {"advisory": "RHSA-2020:4060", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-1160.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-09-29T00:00:00Z"}, {"advisory": "RHSA-2020:2171", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-193.1.2.rt13.53.el8_2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-05-14T00:00:00Z"}, {"advisory": "RHSA-2020:2102", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-193.1.2.el8_2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-05-12T00:00:00Z"}], "bugzilla": {"description": "Kernel: kvm: nVMX: L2 guest may trick the L0 hypervisor to access sensitive L1 resources", "id": "1805135", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1805135"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.8", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N", "status": "verified"}, "cwe": "CWE-200", "details": ["A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest.", "A flaw was found in the way KVM hypervisor handled instruction emulation for the L2 guest when nested(=1) virtualization is enabled. In the instruction emulation, the L2 guest could trick the L0 hypervisor into accessing sensitive bits of the L1 hypervisor. An L2 guest could use this flaw to potentially access information of the L1 hypervisor."], "name": "CVE-2020-2732", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-alt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2020-02-24T18:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-2732\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-2732"], "threat_severity": "Moderate"}

{}