certfr_avis - certfr-2025-avi-0927

CERTFR-2025-AVI-0927

Vulnerability from certfr_avis

Une vulnérabilité a été découverte dans Xen. Elle permet à un attaquant de provoquer une atteinte à la confidentialité des données et un contournement de la politique de sécurité.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

Vendor	Product	Description
XEN	Xen	Xen versions xen-unstable sans le correctif de sécurité xsa476.patch
XEN	Xen	Xen versions 4.x antérieures à 4.17 avec le correctif de sécurité xsa476-4.17.patch
XEN	Xen	Xen versions 4.18.x à 4.20.x sans le correctif de sécurité xsa476-4.20.patch

References

Title

Publication Time

Tags

Bulletin de sécurité Xen xsa/advisory-476

2025-10-24

vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Xen versions xen-unstable sans le correctif de s\u00e9curit\u00e9 xsa476.patch",
      "product": {
        "name": "Xen",
        "vendor": {
          "name": "XEN",
          "scada": false
        }
      }
    },
    {
      "description": "Xen versions 4.x ant\u00e9rieures \u00e0 4.17 avec le correctif de s\u00e9curit\u00e9 xsa476-4.17.patch",
      "product": {
        "name": "Xen",
        "vendor": {
          "name": "XEN",
          "scada": false
        }
      }
    },
    {
      "description": "Xen versions 4.18.x \u00e0 4.20.x sans le correctif de s\u00e9curit\u00e9 xsa476-4.20.patch",
      "product": {
        "name": "Xen",
        "vendor": {
          "name": "XEN",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2025-58149",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-58149"
    }
  ],
  "initial_release_date": "2025-10-27T00:00:00",
  "last_revision_date": "2025-10-27T00:00:00",
  "links": [],
  "reference": "CERTFR-2025-AVI-0927",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2025-10-27T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "Contournement de la politique de s\u00e9curit\u00e9"
    },
    {
      "description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
    }
  ],
  "summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Xen. Elle permet \u00e0 un attaquant de provoquer une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es et un contournement de la politique de s\u00e9curit\u00e9.",
  "title": "Vuln\u00e9rabilit\u00e9 dans Xen",
  "vendor_advisories": [
    {
      "published_at": "2025-10-24",
      "title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-476",
      "url": "https://xenbits.xen.org/xsa/advisory-476.html"
    }
  ]
}

CVE-2025-58149 (GCVE-0-2025-58149)

Vulnerability from cvelistv5

Published

2025-10-31 11:50

Modified

2025-11-04 21:13

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

When passing through PCI devices, the detach logic in libxl won't remove access permissions to any 64bit memory BARs the device might have. As a result a domain can still have access any 64bit memory BAR when such device is no longer assigned to the domain. For PV domains the permission leak allows the domain itself to map the memory in the page-tables. For HVM it would require a compromised device model or stubdomain to map the leaked memory into the HVM domain p2m.

References

URL

Tags

https://xenbits.xenproject.org/xsa/advisory-476.html

Impacted products

	Vendor	Product	Version
	Xen	Xen

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-58149",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-11-03T14:24:29.854834Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-672",
                "description": "CWE-672 Operation on a Resource after Expiration or Release",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-11-03T14:24:43.755Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T21:13:31.524Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://xenbits.xen.org/xsa/advisory-476.html"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/10/24/1"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Xen",
          "vendor": "Xen",
          "versions": [
            {
              "status": "unknown",
              "version": "consult Xen advisory XSA-476"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "Xen versions 4.0 and newer are vulnerable.\n\nOnly PV guests with PCI passthrough devices can leverage the vulnerability.\n\nOnly domains whose PCI devices are managed by the libxl library are affected.\nThis includes the xl toolstack and xapi, which uses the xl toolstack when\ndealing with PCI devices.\n\nHVM guests are also affected, but accessing the leaked memory requires an\nadditional compromised component on the system."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "This issue was discovered by Jiqian Chen of AMD and diagnosed as a\nsecurity issue by Roger Pau Monn\u00e9 of XenServer."
        }
      ],
      "datePublic": "2025-10-24T12:13:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "When passing through PCI devices, the detach logic in libxl won\u0027t remove\naccess permissions to any 64bit memory BARs the device might have.  As a\nresult a domain can still have access any 64bit memory BAR when such\ndevice is no longer assigned to the domain.\n\nFor PV domains the permission leak allows the domain itself to map the memory\nin the page-tables.  For HVM it would require a compromised device model or\nstubdomain to map the leaked memory into the HVM domain p2m."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "A buggy or malicious PV guest can access memory of PCI devices no longer\nassigned to it."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-31T11:50:39.536Z",
        "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "shortName": "XEN"
      },
      "references": [
        {
          "url": "https://xenbits.xenproject.org/xsa/advisory-476.html"
        }
      ],
      "title": "Incorrect removal of permissions on PCI device unplug",
      "workarounds": [
        {
          "lang": "en",
          "value": "Not doing hot unplug of PCI devices will avoid the vulnerability.\n\nPassing through PCI devices to HVM domains only will also limit the impact, as\nan attacker would require another compromised component to exploit it."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "cveId": "CVE-2025-58149",
    "datePublished": "2025-10-31T11:50:39.536Z",
    "dateReserved": "2025-08-26T06:48:41.443Z",
    "dateUpdated": "2025-11-04T21:13:31.524Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

CERTFR-2025-AVI-0927

Vulnerability from certfr_avis

Solutions

CVE-2025-58149 (GCVE-0-2025-58149)

Vulnerability from cvelistv5

Tags

Sightings

Nomenclature