csaf_certbund - wid-sec-w-2025-2409

WID-SEC-W-2025-2409

Vulnerability from csaf_certbund - Published: 2025-10-26 23:00 - Updated: 2025-12-02 23:00

Summary

Xen: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung

Xen ist ein Virtueller-Maschinen-Monitor (VMM), der Hardware (x86, IA-64, PowerPC) für die darauf laufenden Systeme (Domains) paravirtualisiert.

Angriff

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Xen ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

Betroffene Betriebssysteme

- Hardware Appliance

JSON

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{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Xen ist ein Virtueller-Maschinen-Monitor (VMM), der Hardware (x86, IA-64, PowerPC) f\u00fcr die darauf laufenden Systeme (Domains) paravirtualisiert.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Xen ausnutzen, um Sicherheitsvorkehrungen zu umgehen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Hardware Appliance",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2025-2409 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-2409.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2025-2409 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-2409"
      },
      {
        "category": "external",
        "summary": "Xen Security Advisory vom 2025-10-26",
        "url": "https://xenbits.xen.org/xsa/advisory-476.html"
      },
      {
        "category": "external",
        "summary": "openSUSE Security Update OPENSUSE-SU-2025:15719-1 vom 2025-11-09",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/IA5TMAIYGVFPCOWUYI6UZDN37HVH6EXG/"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DSA-6068 vom 2025-12-03",
        "url": "https://lists.debian.org/debian-security-announce/2025/msg00234.html"
      }
    ],
    "source_lang": "en-US",
    "title": "Xen: Schwachstelle erm\u00f6glicht Umgehen von Sicherheitsvorkehrungen",
    "tracking": {
      "current_release_date": "2025-12-02T23:00:00.000+00:00",
      "generator": {
        "date": "2025-12-03T08:02:56.816+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2025-2409",
      "initial_release_date": "2025-10-26T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2025-10-26T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2025-11-09T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von openSUSE aufgenommen"
        },
        {
          "date": "2025-12-02T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Debian aufgenommen"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Debian Linux",
            "product": {
              "name": "Debian Linux",
              "product_id": "2951",
              "product_identification_helper": {
                "cpe": "cpe:/o:debian:debian_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Debian"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003cxsa476-4.17.patch",
                "product": {
                  "name": "Open Source Xen \u003cxsa476-4.17.patch",
                  "product_id": "T048152"
                }
              },
              {
                "category": "product_version",
                "name": "xsa476-4.17.patch",
                "product": {
                  "name": "Open Source Xen xsa476-4.17.patch",
                  "product_id": "T048152-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:xsa476-4.17.patch"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003cxsa476-4.20.patch",
                "product": {
                  "name": "Open Source Xen \u003cxsa476-4.20.patch",
                  "product_id": "T048153"
                }
              },
              {
                "category": "product_version",
                "name": "xsa476-4.20.patch",
                "product": {
                  "name": "Open Source Xen xsa476-4.20.patch",
                  "product_id": "T048153-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:xsa476-4.20.patch"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003cxsa476.patch",
                "product": {
                  "name": "Open Source Xen \u003cxsa476.patch",
                  "product_id": "T048154"
                }
              },
              {
                "category": "product_version",
                "name": "xsa476.patch",
                "product": {
                  "name": "Open Source Xen xsa476.patch",
                  "product_id": "T048154-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:xsa476.patch"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Xen"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE openSUSE",
            "product": {
              "name": "SUSE openSUSE",
              "product_id": "T027843",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:opensuse:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-58149",
      "product_status": {
        "known_affected": [
          "2951",
          "T048153",
          "T048152",
          "T027843",
          "T048154"
        ]
      },
      "release_date": "2025-10-26T23:00:00.000+00:00",
      "title": "CVE-2025-58149"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13

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.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-672 - Operation on a Resource after Expiration or Release

Assigner

XEN

References

URL

Tags

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

Impacted products

	Vendor	Product	Version
	Xen	Xen	Unknown: consult Xen advisory XSA-476

Credits

This issue was discovered by Jiqian Chen of AMD and diagnosed as a security issue by Roger Pau Monné of XenServer.

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 observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

WID-SEC-W-2025-2409

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

Tags

Sightings

Nomenclature