gsd-2020-27674
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.
Aliases
Aliases
CVE-2020-27674


To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-27674",
    "description": "An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.",
    "id": "GSD-2020-27674",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-27674.html",
      "https://www.debian.org/security/2020/dsa-4804"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-27674"
      ],
      "details": "An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.",
      "id": "GSD-2020-27674",
      "modified": "2023-12-13T01:22:11.472028Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2020-27674",
        "STATE": "PUBLIC"
      },
      "affects": {
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          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
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      },
      "references": {
        "reference_data": [
          {
            "name": "https://xenbits.xen.org/xsa/advisory-286.html",
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          },
          {
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          },
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          },
          {
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          },
          {
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          },
          {
            "name": "[oss-security] 20210119 Xen Security Advisory 286 v6 (CVE-2020-27674) - x86 PV guest INVLPG-like flushes may leave stale TLB entries",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2021/01/19/5"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
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            "children": [],
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              {
                "cpe23Uri": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*",
                "cpe_name": [],
                "versionEndIncluding": "4.14.0",
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              }
            ],
            "operator": "OR"
          },
          {
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          },
          {
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            "cpe_match": [
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            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
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            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-787"
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              ]
            }
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://xenbits.xen.org/xsa/advisory-286.html",
              "refsource": "MISC",
              "tags": [
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              "url": "https://xenbits.xen.org/xsa/advisory-286.html"
            },
            {
              "name": "GLSA-202011-06",
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            },
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              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/"
            },
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              "url": "https://www.debian.org/security/2020/dsa-4804"
            },
            {
              "name": "[oss-security] 20210119 Xen Security Advisory 286 v6 (CVE-2020-27674) - x86 PV guest INVLPG-like flushes may leave stale TLB entries",
              "refsource": "MLIST",
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                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2021/01/19/5"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 4.6,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 3.4
        }
      },
      "lastModifiedDate": "2022-04-26T16:29Z",
      "publishedDate": "2020-10-22T21:15Z"
    }
  }
}


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