csaf_certbund - wid-sec-w-2023-2399

wid-sec-w-2023-2399

Vulnerability from csaf_certbund

Published

2023-09-19 22:00

Modified

2023-11-16 23:00

Summary

Xen: Schwachstelle ermöglicht Privilegieneskalation, DoS und 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 eine Schwachstelle in Xen ausnutzen, um seine Privilegien zu erhöhen, einen Denial of Service zu verursachen oder Informationen offenzulegen.

Betroffene Betriebssysteme

- UNIX - Linux

JSON

To clipboard

{
  "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 lokaler Angreifer kann eine Schwachstelle in Xen ausnutzen, um seine Privilegien zu erh\u00f6hen, einen Denial of Service zu verursachen oder Informationen offenzulegen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- UNIX\n- Linux",
        "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-2023-2399 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-2399.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-2399 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-2399"
      },
      {
        "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-2023:3894-1 vom 2023-09-29",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-September/016464.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:3903-1 vom 2023-09-29",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-September/016465.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:3902-1 vom 2023-09-29",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-September/016466.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:3895-1 vom 2023-09-29",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-September/016463.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:3832-1 vom 2023-09-27",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-September/016360.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2023:3831-1 vom 2023-09-27",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2023-September/016361.html"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2023-35D2AD2328 vom 2023-09-26",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2023-35d2ad2328"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2023-948136565A vom 2023-09-26",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2023-948136565a"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2023-4125279976 vom 2023-09-26",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2023-4125279976"
      },
      {
        "category": "external",
        "summary": "Xen Security Advisory vom 2023-09-19",
        "url": "https://xenbits.xen.org/xsa/advisory-438.html"
      }
    ],
    "source_lang": "en-US",
    "title": "Xen: Schwachstelle erm\u00f6glicht Privilegieneskalation, DoS und Offenlegung von Informationen",
    "tracking": {
      "current_release_date": "2023-11-16T23:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T17:58:38.725+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
        }
      },
      "id": "WID-SEC-W-2023-2399",
      "initial_release_date": "2023-09-19T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2023-09-19T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2023-09-26T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Fedora aufgenommen"
        },
        {
          "date": "2023-09-27T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2023-10-01T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2023-11-16T23:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von SUSE aufgenommen"
        }
      ],
      "status": "final",
      "version": "5"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "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 438-4.15.patch",
                "product": {
                  "name": "Open Source Xen \u003c 438-4.15.patch",
                  "product_id": "T029991",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:438-4.15.patch"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Open Source Xen \u003c 438-4.16.patch",
                "product": {
                  "name": "Open Source Xen \u003c 438-4.16.patch",
                  "product_id": "T029992",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:438-4.16.patch"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Open Source Xen \u003c 438-4.17.patch",
                "product": {
                  "name": "Open Source Xen \u003c 438-4.17.patch",
                  "product_id": "T029993",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:438-4.17.patch"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Open Source Xen \u003c 438.patch",
                "product": {
                  "name": "Open Source Xen \u003c 438.patch",
                  "product_id": "T029994",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:xen:xen:438.patch"
                  }
                }
              }
            ],
            "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-2023-34322",
      "notes": [
        {
          "category": "description",
          "text": "Es existiert eine Schwachstelle in Xen. Wenn PV-G\u00e4ste im Shadow-Paging-Modus ausgef\u00fchrt werden, kommt es unter bestimmten Umst\u00e4nden zu einer unsachgem\u00e4\u00dfen Behandlung der \"shadow root page table\". Ein lokaler Angreifer kann diese Schwachstelle ausnutzen, um potentiell seine Rechte zu erweitern, einen Denial of Service zu verursachen oder Informationen offenzulegen."
        }
      ],
      "product_status": {
        "known_affected": [
          "T002207",
          "74185"
        ]
      },
      "release_date": "2023-09-19T22:00:00.000+00:00",
      "title": "CVE-2023-34322"
    }
  ]
}

cve-2023-34322

Vulnerability from cvelistv5

Published

2024-01-05 16:18

Modified

2024-08-27 15:51

Severity ?

Summary

For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run directly the respective shadow page tables. For 64-bit PV guests this means running on the shadow of the guest root page table. In the course of dealing with shortage of memory in the shadow pool associated with a domain, shadows of page tables may be torn down. This tearing down may include the shadow root page table that the CPU in question is presently running on. While a precaution exists to supposedly prevent the tearing down of the underlying live page table, the time window covered by that precaution isn't large enough.

References

▼	URL	Tags
	https://xenbits.xenproject.org/xsa/advisory-438.html

Impacted products

Vendor

Product

Version

▼

Xen

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T16:10:06.455Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-438.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-34322",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-08-27T15:50:09.329667Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-08-27T15:51:20.422Z",
          "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-438"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "All Xen versions from at least 3.2 onwards are vulnerable.  Earlier\nversions have not been inspected.\n\nOnly x86 systems are vulnerable.  Only 64-bit PV guests can leverage the\nvulnerability, and only when running in shadow mode.  Shadow mode would\nbe in use when migrating guests or as a workaround for XSA-273 (L1TF).\n"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "This issue was discovered by Tim Deegan, and Jan Beulich of SUSE.\n"
        }
      ],
      "datePublic": "2023-09-19T12:00:00Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "For migration as well as to work around kernels unaware of L1TF (see\nXSA-273), PV guests may be run in shadow paging mode.  Since Xen itself\nneeds to be mapped when PV guests run, Xen and shadowed PV guests run\ndirectly the respective shadow page tables.  For 64-bit PV guests this\nmeans running on the shadow of the guest root page table.\n\nIn the course of dealing with shortage of memory in the shadow pool\nassociated with a domain, shadows of page tables may be torn down.  This\ntearing down may include the shadow root page table that the CPU in\nquestion is presently running on.  While a precaution exists to\nsupposedly prevent the tearing down of the underlying live page table,\nthe time window covered by that precaution isn\u0027t large enough.\n"
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "Privilege escalation, Denial of Service (DoS) affecting the entire host,\nand information leaks all cannot be ruled out.\n"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-05T16:18:01.363Z",
        "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "shortName": "XEN"
      },
      "references": [
        {
          "url": "https://xenbits.xenproject.org/xsa/advisory-438.html"
        }
      ],
      "title": "top-level shadow reference dropped too early for 64-bit PV guests",
      "workarounds": [
        {
          "lang": "en",
          "value": "Running only HVM or PVH guests will avoid the vulnerability.\n\nRunning PV guests in the PV shim will also avoid the vulnerability.\n"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "cveId": "CVE-2023-34322",
    "datePublished": "2024-01-05T16:18:01.363Z",
    "dateReserved": "2023-06-01T10:44:17.065Z",
    "dateUpdated": "2024-08-27T15:51:20.422Z",
    "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.

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