fkie_cve-2021-28688
Vulnerability from fkie_nvd
Published
2021-04-06 19:15
Modified
2024-11-21 06:00
Severity ?
6.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Summary
The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11.
References
security@xen.orghttps://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlThird Party Advisory
security@xen.orghttps://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlThird Party Advisory
security@xen.orghttps://xenbits.xenproject.org/xsa/advisory-371.txtPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://xenbits.xenproject.org/xsa/advisory-371.txtPatch, Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
debian debian_linux 9.0


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C9F05E8C-CEFC-4C34-9B1F-E9D1E8DC098B",
              "versionEndIncluding": "5.10.18",
              "versionStartIncluding": "3.11",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn\u0027t use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11."
    },
    {
      "lang": "es",
      "value": "La soluci\u00f3n para XSA-365 incluye la inicializaci\u00f3n de punteros de modo que el c\u00f3digo de limpieza posterior no utilice valores no inicializados o obsoletos.\u0026#xa0;Esta inicializaci\u00f3n fue demasiado lejos y, en determinadas condiciones, tambi\u00e9n puede sobrescribir los punteros que est\u00e1n requiriendo una limpieza.\u0026#xa0;La falta de limpieza resultar\u00eda en fugas de subsidios persistentes.\u0026#xa0;A su vez, la filtraci\u00f3n impedir\u00eda a una limpieza completa despu\u00e9s de que un invitado respectivo haya terminado, dejando dominios zombies.\u0026#xa0;Todas las versiones de Linux que presentan la correcci\u00f3n para XSA-365 aplicada son vulnerables.\u0026#xa0;XSA-365 se clasific\u00f3 para afectar a las versiones de al menos 3.11"
    }
  ],
  "id": "CVE-2021-28688",
  "lastModified": "2024-11-21T06:00:08.800",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 2.1,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 4.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-04-06T19:15:14.863",
  "references": [
    {
      "source": "security@xen.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html"
    },
    {
      "source": "security@xen.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html"
    },
    {
      "source": "security@xen.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://xenbits.xenproject.org/xsa/advisory-371.txt"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://xenbits.xenproject.org/xsa/advisory-371.txt"
    }
  ],
  "sourceIdentifier": "security@xen.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-665"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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.