GSD-2021-3308

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host.
Aliases
Aliases
CVE-2021-3308
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{
  "GSD": {
    "alias": "CVE-2021-3308",
    "description": "An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host.",
    "id": "GSD-2021-3308",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-3308.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-3308"
      ],
      "details": "An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host.",
      "id": "GSD-2021-3308",
      "modified": "2023-12-13T01:23:35.224904Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2021-3308",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
                        }
                      ]
                    }
                  }
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              },
              "vendor_name": "n/a"
            }
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      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
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          {
            "lang": "eng",
            "value": "An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host."
          }
        ]
      },
      "problemtype": {
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                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
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      },
      "references": {
        "reference_data": [
          {
            "name": "http://xenbits.xen.org/xsa/advisory-360.html",
            "refsource": "MISC",
            "url": "http://xenbits.xen.org/xsa/advisory-360.html"
          },
          {
            "name": "[oss-security] 20210126 Xen Security Advisory 360 v2 (CVE-2021-3308) - IRQ vector leak on x86",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2021/01/26/4"
          },
          {
            "name": "FEDORA-2021-16c9c40d4d",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S5C42TMQYB6SDVT2MPFEWY65A6RSUVBN/"
          },
          {
            "name": "GLSA-202107-30",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/202107-30"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:xen:xen:4.12.3:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:xen:xen:4.12.4:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "4.14.1",
                "versionStartIncluding": "4.13.1",
                "vulnerable": true
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            "operator": "OR"
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          {
            "children": [],
            "cpe_match": [
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                "cpe_name": [],
                "vulnerable": true
              }
            ],
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        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-3308"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "NVD-CWE-noinfo"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "http://xenbits.xen.org/xsa/advisory-360.html",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Vendor Advisory"
              ],
              "url": "http://xenbits.xen.org/xsa/advisory-360.html"
            },
            {
              "name": "[oss-security] 20210126 Xen Security Advisory 360 v2 (CVE-2021-3308) - IRQ vector leak on x86",
              "refsource": "MLIST",
              "tags": [
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                "Patch",
                "Third Party Advisory"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2021/01/26/4"
            },
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              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S5C42TMQYB6SDVT2MPFEWY65A6RSUVBN/"
            },
            {
              "name": "GLSA-202107-30",
              "refsource": "GENTOO",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://security.gentoo.org/glsa/202107-30"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 4.9,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 6.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2022-04-26T16:33Z",
      "publishedDate": "2021-01-26T20:15Z"
    }
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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