{
  "id": "CVE-2021-20263",
  "sourceIdentifier": "secalert@redhat.com",
  "published": "2021-03-09T18:15:15.593",
  "lastModified": "2022-09-30T13:29:37.727",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in the virtio-fs shared file system daemon (virtiofsd) of QEMU. The new 'xattrmap' option may cause the 'security.capability' xattr in the guest to not drop on file write, potentially leading to a modified, privileged executable in the guest. In rare circumstances, this flaw could be used by a malicious user to elevate their privileges within the guest."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 un fallo en el demonio del sistema de archivos compartidos virtio-fs (virtiofsd) de QEMU. La nueva opci\u00f3n \"xattrmap\" puede causar que el xattr \"security.capability\" en el invitado no caiga en la escritura del archivo, potencialmente conllevando a un ejecutable privilegiado modificado en el invitado. En raras ocasiones, un usuario malicioso podr\u00eda usar este fallo para elevar sus privilegios dentro del invitado"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE",
          "baseScore": 3.3,
          "baseSeverity": "LOW"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:P/A:N",
          "accessVector": "LOCAL",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "NONE",
          "baseScore": 2.1
        },
        "baseSeverity": "LOW",
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "secalert@redhat.com",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-281"
        }
      ]
    },
    {
      "source": "nvd@nist.gov",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-281"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "5.0.0",
              "versionEndExcluding": "5.2.50",
              "matchCriteriaId": "58E0AF3A-FB63-438D-892E-960107BAFEC7"
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  ],
  "references": [
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1933668",
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://security.gentoo.org/glsa/202208-27",
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20210507-0002/",
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.openwall.com/lists/oss-security/2021/03/08/1",
      "source": "secalert@redhat.com",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
      ]
    }
  ]
}