github - ghsa-gp69-2mv4-2f25

ghsa-gp69-2mv4-2f25

Vulnerability from github

Published

2022-05-24 19:12

Modified

2022-08-16 00:00

Severity ?

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

Details

inadequate grant-v2 status frames array bounds check The v2 grant table interface separates grant attributes from grant status. That is, when operating in this mode, a guest has two tables. As a result, guests also need to be able to retrieve the addresses that the new status tracking table can be accessed through. For 32-bit guests on x86, translation of requests has to occur because the interface structure layouts commonly differ between 32- and 64-bit. The translation of the request to obtain the frame numbers of the grant status table involves translating the resulting array of frame numbers. Since the space used to carry out the translation is limited, the translation layer tells the core function the capacity of the array within translation space. Unfortunately the core function then only enforces array bounds to be below 8 times the specified value, and would write past the available space if enough frame numbers needed storing.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-28699"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-08-27T19:15:00Z",
    "severity": "MODERATE"
  },
  "details": "inadequate grant-v2 status frames array bounds check The v2 grant table interface separates grant attributes from grant status. That is, when operating in this mode, a guest has two tables. As a result, guests also need to be able to retrieve the addresses that the new status tracking table can be accessed through. For 32-bit guests on x86, translation of requests has to occur because the interface structure layouts commonly differ between 32- and 64-bit. The translation of the request to obtain the frame numbers of the grant status table involves translating the resulting array of frame numbers. Since the space used to carry out the translation is limited, the translation layer tells the core function the capacity of the array within translation space. Unfortunately the core function then only enforces array bounds to be below 8 times the specified value, and would write past the available space if enough frame numbers needed storing.",
  "id": "GHSA-gp69-2mv4-2f25",
  "modified": "2022-08-16T00:00:43Z",
  "published": "2022-05-24T19:12:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28699"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2VQCFAPBNGBBAOMJZG6QBREOG5IIDZID"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FZCNPSRPGFCQRYE2BI4D4Q4SCE56ANV2"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LPRVHW4J4ZCPPOHZEWP5MOJT7XDGFFPJ"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202208-23"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2021/dsa-4977"
    },
    {
      "type": "WEB",
      "url": "https://xenbits.xenproject.org/xsa/advisory-382.txt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2021-28699

Vulnerability from cvelistv5

Published

2021-08-27 18:21

Modified

2024-08-03 21:47

Severity ?

Summary

References

▼	URL	Tags
	https://xenbits.xenproject.org/xsa/advisory-382.txt	x_refsource_MISC
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LPRVHW4J4ZCPPOHZEWP5MOJT7XDGFFPJ/	vendor-advisory, x_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZCNPSRPGFCQRYE2BI4D4Q4SCE56ANV2/	vendor-advisory, x_refsource_FEDORA
	https://www.debian.org/security/2021/dsa-4977	vendor-advisory, x_refsource_DEBIAN
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2VQCFAPBNGBBAOMJZG6QBREOG5IIDZID/	vendor-advisory, x_refsource_FEDORA
	https://security.gentoo.org/glsa/202208-23	vendor-advisory, x_refsource_GENTOO

Impacted products

▼	Vendor	Product
	Xen	xen

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T21:47:33.197Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-382.txt"
          },
          {
            "name": "FEDORA-2021-4f129cc0c1",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LPRVHW4J4ZCPPOHZEWP5MOJT7XDGFFPJ/"
          },
          {
            "name": "FEDORA-2021-d68ed12e46",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZCNPSRPGFCQRYE2BI4D4Q4SCE56ANV2/"
          },
          {
            "name": "DSA-4977",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2021/dsa-4977"
          },
          {
            "name": "FEDORA-2021-081f9bf5d2",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2VQCFAPBNGBBAOMJZG6QBREOG5IIDZID/"
          },
          {
            "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": [
            {
              "lessThan": "4.12",
              "status": "unknown",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThan": "unspecified",
              "status": "affected",
              "version": "4.11.x",
              "versionType": "custom"
            },
            {
              "lessThan": "unspecified",
              "status": "unaffected",
              "version": "next of xen-unstable",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "{\u0027credit_data\u0027: {\u0027description\u0027: {\u0027description_data\u0027: [{\u0027lang\u0027: \u0027eng\u0027, \u0027value\u0027: \u0027This issue was discovered by Jan Beulich of SUSE.\u0027}]}}}"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "inadequate grant-v2 status frames array bounds check The v2 grant table interface separates grant attributes from grant status. That is, when operating in this mode, a guest has two tables. As a result, guests also need to be able to retrieve the addresses that the new status tracking table can be accessed through. For 32-bit guests on x86, translation of requests has to occur because the interface structure layouts commonly differ between 32- and 64-bit. The translation of the request to obtain the frame numbers of the grant status table involves translating the resulting array of frame numbers. Since the space used to carry out the translation is limited, the translation layer tells the core function the capacity of the array within translation space. Unfortunately the core function then only enforces array bounds to be below 8 times the specified value, and would write past the available space if enough frame numbers needed storing."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "description": {
                "description_data": [
                  {
                    "lang": "eng",
                    "value": "Malicious or buggy guest kernels may be able to mount a Denial of\nService (DoS) attack affecting the entire system.  Privilege escalation\nand information leaks cannot be ruled out."
                  }
                ]
              }
            },
            "type": "unknown"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "unknown",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-08-14T20:12:37",
        "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "shortName": "XEN"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://xenbits.xenproject.org/xsa/advisory-382.txt"
        },
        {
          "name": "FEDORA-2021-4f129cc0c1",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LPRVHW4J4ZCPPOHZEWP5MOJT7XDGFFPJ/"
        },
        {
          "name": "FEDORA-2021-d68ed12e46",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZCNPSRPGFCQRYE2BI4D4Q4SCE56ANV2/"
        },
        {
          "name": "DSA-4977",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2021/dsa-4977"
        },
        {
          "name": "FEDORA-2021-081f9bf5d2",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2VQCFAPBNGBBAOMJZG6QBREOG5IIDZID/"
        },
        {
          "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-2021-28699",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "xen",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "?\u003c",
                            "version_value": "4.12"
                          },
                          {
                            "version_affected": "\u003e=",
                            "version_value": "4.11.x"
                          },
                          {
                            "version_affected": "!\u003e",
                            "version_value": "xen-unstable"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Xen"
              }
            ]
          }
        },
        "configuration": {
          "configuration_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "All Xen versions from 4.10 onwards are affected.  Xen versions 4.9 and\nolder are not affected.\n\nOnly 32-bit x86 guests permitted to use grant table version 2 interfaces\ncan leverage this vulnerability.  64-bit x86 guests cannot leverage this\nvulnerability, but note that HVM and PVH guests are free to alter their\nbitness as they see fit.  On Arm, grant table v2 use is explicitly\nunsupported.\n\nOnly guests permitted to have 8177 or more grant table frames can\nleverage this vulnerability."
                }
              ]
            }
          }
        },
        "credit": {
          "credit_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "This issue was discovered by Jan Beulich of SUSE."
                }
              ]
            }
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "inadequate grant-v2 status frames array bounds check The v2 grant table interface separates grant attributes from grant status. That is, when operating in this mode, a guest has two tables. As a result, guests also need to be able to retrieve the addresses that the new status tracking table can be accessed through. For 32-bit guests on x86, translation of requests has to occur because the interface structure layouts commonly differ between 32- and 64-bit. The translation of the request to obtain the frame numbers of the grant status table involves translating the resulting array of frame numbers. Since the space used to carry out the translation is limited, the translation layer tells the core function the capacity of the array within translation space. Unfortunately the core function then only enforces array bounds to be below 8 times the specified value, and would write past the available space if enough frame numbers needed storing."
            }
          ]
        },
        "impact": {
          "impact_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "Malicious or buggy guest kernels may be able to mount a Denial of\nService (DoS) attack affecting the entire system.  Privilege escalation\nand information leaks cannot be ruled out."
                }
              ]
            }
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "unknown"
                }
              ]
            }
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://xenbits.xenproject.org/xsa/advisory-382.txt",
              "refsource": "MISC",
              "url": "https://xenbits.xenproject.org/xsa/advisory-382.txt"
            },
            {
              "name": "FEDORA-2021-4f129cc0c1",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LPRVHW4J4ZCPPOHZEWP5MOJT7XDGFFPJ/"
            },
            {
              "name": "FEDORA-2021-d68ed12e46",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FZCNPSRPGFCQRYE2BI4D4Q4SCE56ANV2/"
            },
            {
              "name": "DSA-4977",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2021/dsa-4977"
            },
            {
              "name": "FEDORA-2021-081f9bf5d2",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2VQCFAPBNGBBAOMJZG6QBREOG5IIDZID/"
            },
            {
              "name": "GLSA-202208-23",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/202208-23"
            }
          ]
        },
        "workaround": {
          "workaround_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "The problem can be avoided by not increasing too much the number of\ngrants Xen would allow guests to establish.  The limit is controlled by\nthe \"gnttab_max_frames\" Xen command line option and the\n\"max_grant_frames\" xl domain configuration setting.\n\n- From Xen 4.14 onwards it is also possible to alter the system wide upper\nbound of the number of grants Xen would allow guests to establish by\nwriting to the /params/gnttab_max_frames hypervisor file system node.\nNote however that changing the value this way will only affect guests\nyet to be created on the respective host.\n\nSuppressing use of grant table v2 interfaces for 32-bit x86 guests will\nalso avoid this vulnerability."
                }
              ]
            }
          }
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "cveId": "CVE-2021-28699",
    "datePublished": "2021-08-27T18:21:40",
    "dateReserved": "2021-03-18T00:00:00",
    "dateUpdated": "2024-08-03T21:47:33.197Z",
    "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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