{"id":"CVE-2024-31146","state":"PUBLISHED","title":"PCI device pass-through with shared resources","description":"When multiple devices share resources and one of them is to be passed\nthrough to a guest, security of the entire system and of respective\nguests individually cannot really be guaranteed without knowing\ninternals of any of the involved guests.  Therefore such a configuration\ncannot really be security-supported, yet making that explicit was so far\nmissing.\n\nResources the sharing of which is known to be problematic include, but\nare not limited to\n- - PCI Base Address Registers (BARs) of multiple devices mapping to the\n  same page (4k on x86),\n- - INTx lines.","publishedAt":"2024-09-25T10:31:51.154Z","updatedAt":"2024-09-25T13:24:47.409Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"XEN","products":["Xen Xen"],"affected":[{"vendor":"Xen","product":"Xen","defaultStatus":"unknown","versions":[{"version":"consult Xen advisory XSA-461","status":"unknown"}]}],"references":["https://xenbits.xenproject.org/xsa/advisory-461.html","http://xenbits.xen.org/xsa/advisory-461.html","http://www.openwall.com/lists/oss-security/2024/08/14/3"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:07:21.467Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/31xxx/CVE-2024-31146.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-31146","state":"PUBLISHED","datePublished":"2024-09-25T10:31:51.154Z","dateUpdated":"2024-09-25T13:24:47.409Z","assignerShortName":"XEN","assignerOrgId":"23aa2041-22e1-471f-9209-9b7396fa234f","dateReserved":"2024-03-28T18:14:12.893Z"},"containers":{"cna":{"title":"PCI device pass-through with shared resources","descriptions":[{"lang":"en","value":"When multiple devices share resources and one of them is to be passed\nthrough to a guest, security of the entire system and of respective\nguests individually cannot really be guaranteed without knowing\ninternals of any of the involved guests.  Therefore such a configuration\ncannot really be security-supported, yet making that explicit was so far\nmissing.\n\nResources the sharing of which is known to be problematic include, but\nare not limited to\n- - PCI Base Address Registers (BARs) of multiple devices mapping to the\n  same page (4k on x86),\n- - INTx lines."}],"affected":[{"vendor":"Xen","product":"Xen","defaultStatus":"unknown","versions":[{"version":"consult Xen advisory XSA-461","status":"unknown"}]}],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-461.html"}],"providerMetadata":{"shortName":"XEN","orgId":"23aa2041-22e1-471f-9209-9b7396fa234f","dateUpdated":"2024-09-25T10:31:51.154Z"},"datePublic":"2024-08-13T12:00:00.000Z","impacts":[{"descriptions":[{"lang":"en","value":"The precise effects when shared resources are in use are system, device,\nguest, and resource specific.  None of privilege escalation, information\nleaks, or Denial of Service (DoS) can be ruled out."}]}],"configurations":[{"lang":"en","value":"All systems making use of PCI pass-through are in principle vulnerable,\nwhen any kind of resource is shared.  Just to re-iterate, even in the\nabsence of resource sharing caveats apply to passing through of PCI\ndevices to entirely untrusted guests."}],"workarounds":[{"lang":"en","value":"Passing through only SR-IOV virtual functions or devices with well-\nseparated resources will avoid this particular vulnerability.  Passing\nthrough all devices sharing a given resource to the same guest will also\navoid this particular vulnerability."}]},"adp":[{"title":"CVE Program Container","references":[{"url":"http://xenbits.xen.org/xsa/advisory-461.html"},{"url":"http://www.openwall.com/lists/oss-security/2024/08/14/3"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-09-25T11:02:55.207Z"}},{"title":"CISA ADP Vulnrichment","affected":[{"vendor":"xen","product":"xen","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"*","versionType":"custom"}],"cpes":["cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*"]}],"metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":7.5,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"HIGH","privilegesRequired":"HIGH","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2024-09-25T13:14:46.996097Z","id":"CVE-2024-31146","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","type":"CWE","lang":"en","description":"CWE-400 Uncontrolled Resource Consumption"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-25T13:24:47.409Z"}}]}}}