CVE-2022-33745

{"id": "CVE-2022-33745", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.0}]}, "published": "2022-07-26T13:15:10.003", "references": [{"url": "http://www.openwall.com/lists/oss-security/2022/07/26/2", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "source": "security@xen.org"}, {"url": "http://www.openwall.com/lists/oss-security/2022/07/26/3", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "source": "security@xen.org"}, {"url": "http://xenbits.xen.org/xsa/advisory-408.html", "tags": ["Patch", "Vendor Advisory"], "source": "security@xen.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/", "source": "security@xen.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/", "source": "security@xen.org"}, {"url": "https://www.debian.org/security/2022/dsa-5272", "tags": ["Third Party Advisory"], "source": "security@xen.org"}, {"url": "https://xenbits.xenproject.org/xsa/advisory-408.txt", "tags": ["Vendor Advisory"], "source": "security@xen.org"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary."}, {"lang": "es", "value": "Un vaciado insuficiente del TLB para hu\u00e9spedes x86 PV en modo de sombra Para la migraci\u00f3n, as\u00ed como para trabajar en torno a los kernels que no son conscientes de L1TF (v\u00e9ase XSA-273), los hu\u00e9spedes PV pueden ejecutarse en modo de paginaci\u00f3n de sombra. Para abordar XSA-401, el c\u00f3digo fue movido dentro de una funci\u00f3n en Xen. Este movimiento de c\u00f3digo pas\u00f3 por alto una variable que cambiaba de significado/valor entre las posiciones de c\u00f3digo antiguas y nuevas. El uso ahora err\u00f3neo de la variable conllevaba a una condici\u00f3n err\u00f3nea de vaciado de la TLB, omitiendo el vaciado cuando era necesario."}], "lastModified": "2023-11-07T03:48:22.143", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*", "vulnerable": true, "matchCriteriaId": "EF4E17C2-244F-4E5A-A5F8-4626CD1AC11A"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED"}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA"}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5C675112-476C-4D7C-BCB9-A2FB2D0BC9FD"}], "operator": "OR"}]}], "sourceIdentifier": "security@xen.org"}