cve-2022-26364
Vulnerability from cvelistv5
Published
2022-06-09 12:50
Modified
2024-08-03 05:03
Severity ?
Summary
x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen's safety logic can incorrectly conclude that the contents of a page is safe.
References
security@xen.orghttp://packetstormsecurity.com/files/167710/Xen-PV-Guest-Non-SELFSNOOP-CPU-Memory-Corruption.htmlExploit, Third Party Advisory, VDB Entry
security@xen.orghttp://www.openwall.com/lists/oss-security/2022/06/09/4Mailing List, Third Party Advisory
security@xen.orghttp://xenbits.xen.org/xsa/advisory-402.htmlPatch, Vendor Advisory
security@xen.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/
security@xen.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/
security@xen.orghttps://security.gentoo.org/glsa/202208-23Third Party Advisory
security@xen.orghttps://www.debian.org/security/2022/dsa-5184Third Party Advisory
security@xen.orghttps://xenbits.xenproject.org/xsa/advisory-402.txtVendor Advisory
Impacted products
Xenxen
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T05:03:32.771Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-402.txt"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "http://xenbits.xen.org/xsa/advisory-402.html"
          },
          {
            "name": "[oss-security] 20220609 Xen Security Advisory 402 v4 (CVE-2022-26363,CVE-2022-26364) - x86 pv: Insufficient care with non-coherent mappings",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/06/09/4"
          },
          {
            "name": "FEDORA-2022-0142d562ca",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/167710/Xen-PV-Guest-Non-SELFSNOOP-CPU-Memory-Corruption.html"
          },
          {
            "name": "DSA-5184",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5184"
          },
          {
            "name": "FEDORA-2022-2c9f8224f8",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/"
          },
          {
            "name": "GLSA-202208-23",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202208-23"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "xen",
          "vendor": "Xen",
          "versions": [
            {
              "status": "unknown",
              "version": "consult Xen advisory XSA-402"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "{\u0027credit_data\u0027: {\u0027description\u0027: {\u0027description_data\u0027: [{\u0027lang\u0027: \u0027eng\u0027, \u0027value\u0027: \u0027This issue was discovered by Jann Horn of Google Project Zero.\u0027}]}}}"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen\u0027s safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen\u0027s safety logic doesn\u0027t account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen\u0027s safety logic can incorrectly conclude that the contents of a page is safe."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "description": {
                "description_data": [
                  {
                    "lang": "eng",
                    "value": "Malicious x86 PV guest administrators can escalate privilege so as to\ncontrol the whole system."
                  }
                ]
              }
            },
            "type": "unknown"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "unknown",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-08-14T20:07:50",
        "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "shortName": "XEN"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://xenbits.xenproject.org/xsa/advisory-402.txt"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "http://xenbits.xen.org/xsa/advisory-402.html"
        },
        {
          "name": "[oss-security] 20220609 Xen Security Advisory 402 v4 (CVE-2022-26363,CVE-2022-26364) - x86 pv: Insufficient care with non-coherent mappings",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2022/06/09/4"
        },
        {
          "name": "FEDORA-2022-0142d562ca",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/167710/Xen-PV-Guest-Non-SELFSNOOP-CPU-Memory-Corruption.html"
        },
        {
          "name": "DSA-5184",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2022/dsa-5184"
        },
        {
          "name": "FEDORA-2022-2c9f8224f8",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/"
        },
        {
          "name": "GLSA-202208-23",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/202208-23"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@xen.org",
          "ID": "CVE-2022-26364",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "xen",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "?",
                            "version_value": "consult Xen advisory XSA-402"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Xen"
              }
            ]
          }
        },
        "configuration": {
          "configuration_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "All versions of Xen are vulnerable.\n\nOnly x86 PV guests can trigger this vulnerability.\n\nOnly x86 PV guests configured with access to devices (e.g. PCI\nPassthrough) can trigger the vulnerability.\n\nOnly CPUs which can issue non-coherent memory accesses are impacted.\nCPUs which enumerate the SelfSnoop feature are not impacted, except as\nnoted in errata.  Therefore, we believe that Xen running on Intel\nIvyBridge or later CPUs is not impacted by the vulnerability."
                }
              ]
            }
          }
        },
        "credit": {
          "credit_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "This issue was discovered by Jann Horn of Google Project Zero."
                }
              ]
            }
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen\u0027s safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen\u0027s safety logic doesn\u0027t account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen\u0027s safety logic can incorrectly conclude that the contents of a page is safe."
            }
          ]
        },
        "impact": {
          "impact_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "Malicious x86 PV guest administrators can escalate privilege so as to\ncontrol the whole system."
                }
              ]
            }
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "unknown"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://xenbits.xenproject.org/xsa/advisory-402.txt",
              "refsource": "MISC",
              "url": "https://xenbits.xenproject.org/xsa/advisory-402.txt"
            },
            {
              "name": "http://xenbits.xen.org/xsa/advisory-402.html",
              "refsource": "CONFIRM",
              "url": "http://xenbits.xen.org/xsa/advisory-402.html"
            },
            {
              "name": "[oss-security] 20220609 Xen Security Advisory 402 v4 (CVE-2022-26363,CVE-2022-26364) - x86 pv: Insufficient care with non-coherent mappings",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2022/06/09/4"
            },
            {
              "name": "FEDORA-2022-0142d562ca",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/"
            },
            {
              "name": "http://packetstormsecurity.com/files/167710/Xen-PV-Guest-Non-SELFSNOOP-CPU-Memory-Corruption.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/167710/Xen-PV-Guest-Non-SELFSNOOP-CPU-Memory-Corruption.html"
            },
            {
              "name": "DSA-5184",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2022/dsa-5184"
            },
            {
              "name": "FEDORA-2022-2c9f8224f8",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/"
            },
            {
              "name": "GLSA-202208-23",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/202208-23"
            }
          ]
        },
        "workaround": {
          "workaround_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "Not passing devices through to untrusted x86 PV guests will avoid the\nvulnerability."
                }
              ]
            }
          }
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "cveId": "CVE-2022-26364",
    "datePublished": "2022-06-09T12:50:14",
    "dateReserved": "2022-03-02T00:00:00",
    "dateUpdated": "2024-08-03T05:03:32.771Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-26364\",\"sourceIdentifier\":\"security@xen.org\",\"published\":\"2022-06-09T17:15:09.037\",\"lastModified\":\"2023-11-07T03:44:59.130\",\"vulnStatus\":\"Modified\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen\u0027s safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen\u0027s safety logic doesn\u0027t account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen\u0027s safety logic can incorrectly conclude that the contents of a page is safe.\"},{\"lang\":\"es\",\"value\":\"x86 pv: Cuidado insuficiente con los mapeos no coherentes [Este registro de informaci\u00f3n CNA se relaciona con m\u00faltiples CVEs; el texto explica qu\u00e9 aspectos/vulnerabilidades corresponden a cada CVE]. Xen mantiene un recuento de referencias de tipo para las p\u00e1ginas, adem\u00e1s de un recuento de referencias regulares. Este esquema es usado para mantener invariantes requeridos para la seguridad de Xen, por ejemplo, los invitados de PV no pueden tener acceso directo de escritura a las tablas de p\u00e1ginas; las actualizaciones necesitan ser auditadas por Xen. Desafortunadamente, la l\u00f3gica de seguridad de Xen no presenta en cuenta la no-coherencia de la cach\u00e9 inducida por la CPU; casos en los que la CPU puede causar que el contenido de la cach\u00e9 sea diferente al contenido en la memoria principal. En estos casos, la l\u00f3gica de seguridad de Xen puede concluir incorrectamente que el contenido de una p\u00e1gina es seguro\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\",\"baseScore\":6.7,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":0.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:N/C:C/I:C/A:C\",\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\",\"baseScore\":7.2},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":3.9,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*\",\"matchCriteriaId\":\"EF4E17C2-244F-4E5A-A5F8-4626CD1AC11A\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"80E516C0-98A4-4ADE-B69F-66A772E2BAAA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5C675112-476C-4D7C-BCB9-A2FB2D0BC9FD\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"http://packetstormsecurity.com/files/167710/Xen-PV-Guest-Non-SELFSNOOP-CPU-Memory-Corruption.html\",\"source\":\"security@xen.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2022/06/09/4\",\"source\":\"security@xen.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://xenbits.xen.org/xsa/advisory-402.html\",\"source\":\"security@xen.org\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/\",\"source\":\"security@xen.org\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/\",\"source\":\"security@xen.org\"},{\"url\":\"https://security.gentoo.org/glsa/202208-23\",\"source\":\"security@xen.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2022/dsa-5184\",\"source\":\"security@xen.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://xenbits.xenproject.org/xsa/advisory-402.txt\",\"source\":\"security@xen.org\",\"tags\":[\"Vendor Advisory\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.