csaf_certbund - wid-sec-w-2023-2900

wid-sec-w-2023-2900

Vulnerability from csaf_certbund

Published

2023-11-14 23:00

Modified

2023-12-21 23:00

Summary

Xen: Mehrere Schwachstellen ermöglichen Offenlegung von Informationen

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 lokaler Angreifer kann mehrere Schwachstellen in Xen ausnutzen, um Informationen offenzulegen.

Betroffene Betriebssysteme

- UNIX - Linux - Windows

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "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 lokaler Angreifer kann mehrere Schwachstellen in Xen ausnutzen, um Informationen offenzulegen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- UNIX\n- Linux\n- Windows",
        "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-2023-2900 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-2900.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-2900 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-2900"
      },
      {
        "category": "external",
        "summary": "Xen Security Advisory XSA-445 vom 2023-11-14",
        "url": "https://xenbits.xen.org/xsa/advisory-445.html"
      },
      {
        "category": "external",
        "summary": "Xen Security Advisory XSA-446 vom 2023-11-14",
        "url": "https://xenbits.xen.org/xsa/advisory-446.html"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2023-E62DA41072 vom 2023-11-15",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2023-e62da41072"
      },
      {
        "category": "external",
        "summary": "Citrix Security Advisory CTX583037 vom 2023-11-15",
        "url": "https://support.citrix.com/article/CTX583037"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:4466-1 vom 2023-11-16",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-November/017053.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:4476-1 vom 2023-11-17",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-November/017058.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:4475-1 vom 2023-11-17",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-November/017059.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:4484-1 vom 2023-11-20",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-November/017126.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:4485-1 vom 2023-11-20",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-November/017125.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:4486-1 vom 2023-11-20",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-November/017124.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:4945-1 vom 2023-12-21",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-December/017515.html"
      }
    ],
    "source_lang": "en-US",
    "title": "Xen: Mehrere Schwachstellen erm\u00f6glichen Offenlegung von Informationen",
    "tracking": {
      "current_release_date": "2023-12-21T23:00:00.000+00:00",
      "generator": {
        "date": "2024-02-15T17:51:05.235+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.0"
        }
      },
      "id": "WID-SEC-W-2023-2900",
      "initial_release_date": "2023-11-14T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2023-11-14T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2023-11-15T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Fedora und Citrix aufgenommen"
        },
        {
          "date": "2023-11-16T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2023-11-20T23:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2023-12-21T23:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von SUSE aufgenommen"
        }
      ],
      "status": "final",
      "version": "5"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Citrix Systems Hypervisor",
            "product": {
              "name": "Citrix Systems Hypervisor",
              "product_id": "T016872",
              "product_identification_helper": {
                "cpe": "cpe:/o:citrix:hypervisor:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Citrix Systems XenServer",
            "product": {
              "name": "Citrix Systems XenServer",
              "product_id": "T004077",
              "product_identification_helper": {
                "cpe": "cpe:/a:citrix:xenserver:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Citrix Systems"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Fedora Linux",
            "product": {
              "name": "Fedora Linux",
              "product_id": "74185",
              "product_identification_helper": {
                "cpe": "cpe:/o:fedoraproject:fedora:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Fedora"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Open Source Xen \u003c 4.17.x",
                "product": {
                  "name": "Open Source Xen \u003c 4.17.x",
                  "product_id": "T031107",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:4.17.x"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Open Source Xen \u003c 4.16.x",
                "product": {
                  "name": "Open Source Xen \u003c 4.16.x",
                  "product_id": "T031108",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:4.16.x"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Open Source Xen \u003c 4.15.x",
                "product": {
                  "name": "Open Source Xen \u003c 4.15.x",
                  "product_id": "T031109",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:4.15.x"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Xen"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE Linux",
            "product": {
              "name": "SUSE Linux",
              "product_id": "T002207",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:suse_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-46835",
      "notes": [
        {
          "category": "description",
          "text": "Es besteht eine Schwachstelle in Xen. Dieser Fehler besteht in den IOMMU-Quarant\u00e4ne-Seitentabellenebenen aufgrund einer Unstimmigkeit zwischen den Ebenen, die dazu f\u00fchrt, dass der Lese-/Schreibzugriff zwischen Ger\u00e4tezuweisungen nicht mehr gel\u00f6scht wird. Ein lokaler Angreifer kann diese Schwachstelle ausnutzen, um vertrauliche Informationen offenzulegen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T004077",
          "T002207",
          "T016872",
          "74185"
        ]
      },
      "release_date": "2023-11-14T23:00:00Z",
      "title": "CVE-2023-46835"
    },
    {
      "cve": "CVE-2023-46836",
      "notes": [
        {
          "category": "description",
          "text": "Es besteht eine Schwachstelle in Xen. Dieser Fehler besteht aufgrund eines unvollst\u00e4ndigen Sicherheitsupdates f\u00fcr BTC/SRSO, das es erm\u00f6glicht, den Inhalt des Speichers anderer Maschinen zu ermitteln. Ein lokaler Angreifer kann diese Schwachstelle ausnutzen, um vertrauliche Informationen offenzulegen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T004077",
          "T002207",
          "T016872",
          "74185"
        ]
      },
      "release_date": "2023-11-14T23:00:00Z",
      "title": "CVE-2023-46836"
    }
  ]
}

cve-2023-46835

Vulnerability from cvelistv5

Published

2024-01-05 16:34

Modified

2024-09-04 19:39

Severity ?

Summary

x86/AMD: mismatch in IOMMU quarantine page table levels

References

▼	URL	Tags
	https://xenbits.xenproject.org/xsa/advisory-445.html

Impacted products

▼	Vendor	Product
	Xen	Xen

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T20:53:21.879Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-445.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-46835",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-04-12T04:00:28.791183Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-04T19:39:59.020Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Xen",
          "vendor": "Xen",
          "versions": [
            {
              "status": "unknown",
              "version": "consult Xen advisory XSA-445"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "All Xen versions supporting PCI passthrough are affected.\n\nOnly x86 AMD systems with IOMMU hardware are vulnerable.\n\nOnly x86 guests which have physical devices passed through to them can\nleverage the vulnerability.\n"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "This issue was discovered by Roger Pau Monn\u00e9 of XenServer.\n"
        }
      ],
      "datePublic": "2023-11-14T12:00:00Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The current setup of the quarantine page tables assumes that the\nquarantine domain (dom_io) has been initialized with an address width\nof DEFAULT_DOMAIN_ADDRESS_WIDTH (48) and hence 4 page table levels.\n\nHowever dom_io being a PV domain gets the AMD-Vi IOMMU page tables\nlevels based on the maximum (hot pluggable) RAM address, and hence on\nsystems with no RAM above the 512GB mark only 3 page-table levels are\nconfigured in the IOMMU.\n\nOn systems without RAM above the 512GB boundary\namd_iommu_quarantine_init() will setup page tables for the scratch\npage with 4 levels, while the IOMMU will be configured to use 3 levels\nonly, resulting in the last page table directory (PDE) effectively\nbecoming a page table entry (PTE), and hence a device in quarantine\nmode gaining write access to the page destined to be a PDE.\n\nDue to this page table level mismatch, the sink page the device gets\nread/write access to is no longer cleared between device assignment,\npossibly leading to data leaks.\n"
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "A device in quarantine mode can access data from previous quarantine\npage table usages, possibly leaking data used by previous domains that\nalso had the device assigned.\n"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-05T16:34:49.531Z",
        "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "shortName": "XEN"
      },
      "references": [
        {
          "url": "https://xenbits.xenproject.org/xsa/advisory-445.html"
        }
      ],
      "title": "x86/AMD: mismatch in IOMMU quarantine page table levels",
      "workarounds": [
        {
          "lang": "en",
          "value": "Not passing through physical devices to guests will avoid the\nvulnerability.\n\nNot using quarantine scratch-page mode will avoid the vulnerability,\nbut could result in other issues.\n"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "cveId": "CVE-2023-46835",
    "datePublished": "2024-01-05T16:34:49.531Z",
    "dateReserved": "2023-10-27T07:55:35.331Z",
    "dateUpdated": "2024-09-04T19:39:59.020Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

cve-2023-46836

Vulnerability from cvelistv5

Published

2024-01-05 16:34

Modified

2024-08-02 20:53

Severity ?

Summary

x86: BTC/SRSO fixes not fully effective

References

▼	URL	Tags
	https://xenbits.xenproject.org/xsa/advisory-446.html

Impacted products

▼	Vendor	Product
	Xen	Xen

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T20:53:21.940Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-446.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Xen",
          "vendor": "Xen",
          "versions": [
            {
              "status": "unknown",
              "version": "consult Xen advisory XSA-446"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "All versions of Xen are vulnerable.\n\nXen is only vulnerable in default configurations on AMD and Hygon CPUs.\n\nXen is not believed to be vulnerable in default configurations on CPUs\nfrom other hardware vendors.\n\nOnly PV guests can leverage the vulnerability.\n"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "This issue was discovered by Andrew Cooper of XenServer.\n"
        }
      ],
      "datePublic": "2023-11-14T12:00:00Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The fixes for XSA-422 (Branch Type Confusion) and XSA-434 (Speculative\nReturn Stack Overflow) are not IRQ-safe.  It was believed that the\nmitigations always operated in contexts with IRQs disabled.\n\nHowever, the original XSA-254 fix for Meltdown (XPTI) deliberately left\ninterrupts enabled on two entry paths; one unconditionally, and one\nconditionally on whether XPTI was active.\n\nAs BTC/SRSO and Meltdown affect different CPU vendors, the mitigations\nare not active together by default.  Therefore, there is a race\ncondition whereby a malicious PV guest can bypass BTC/SRSO protections\nand launch a BTC/SRSO attack against Xen.\n"
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "An attacker in a PV guest might be able to infer the contents of memory\nbelonging to other guests.\n"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-05T16:34:59.036Z",
        "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "shortName": "XEN"
      },
      "references": [
        {
          "url": "https://xenbits.xenproject.org/xsa/advisory-446.html"
        }
      ],
      "title": "x86: BTC/SRSO fixes not fully effective",
      "workarounds": [
        {
          "lang": "en",
          "value": "Running only HVM or PVH VMs will avoid the vulnerability.\n"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "cveId": "CVE-2023-46836",
    "datePublished": "2024-01-05T16:34:59.036Z",
    "dateReserved": "2023-10-27T07:55:35.332Z",
    "dateUpdated": "2024-08-02T20:53:21.940Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.
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

wid-sec-w-2023-2900

Vulnerability from csaf_certbund

cve-2023-46835

Vulnerability from cvelistv5

cve-2023-46836

Vulnerability from cvelistv5

Tags

Sightings

Nomenclature