gsd-2021-0920
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel
Aliases
Aliases
CVE-2021-0920


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-0920",
    "description": "In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel",
    "id": "GSD-2021-0920",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-0920.html",
      "https://access.redhat.com/errata/RHSA-2022:0777",
      "https://access.redhat.com/errata/RHSA-2022:0772",
      "https://access.redhat.com/errata/RHSA-2022:0771",
      "https://access.redhat.com/errata/RHSA-2022:0636",
      "https://access.redhat.com/errata/RHSA-2022:0629",
      "https://access.redhat.com/errata/RHSA-2022:0622",
      "https://access.redhat.com/errata/RHSA-2022:0620",
      "https://access.redhat.com/errata/RHSA-2022:0592",
      "https://access.redhat.com/errata/RHSA-2022:0590",
      "https://access.redhat.com/errata/RHSA-2022:0825",
      "https://access.redhat.com/errata/RHSA-2022:0823",
      "https://access.redhat.com/errata/RHSA-2022:0819",
      "https://access.redhat.com/errata/RHSA-2022:0958",
      "https://access.redhat.com/errata/RHSA-2022:1103",
      "https://access.redhat.com/errata/RHSA-2022:1104",
      "https://access.redhat.com/errata/RHSA-2022:1106",
      "https://access.redhat.com/errata/RHSA-2022:1107",
      "https://ubuntu.com/security/CVE-2021-0920",
      "https://access.redhat.com/errata/RHSA-2022:1263",
      "https://access.redhat.com/errata/RHSA-2022:1324",
      "https://access.redhat.com/errata/RHSA-2022:1373",
      "https://access.redhat.com/errata/RHSA-2022:1417",
      "https://linux.oracle.com/cve/CVE-2021-0920.html",
      "https://access.redhat.com/errata/RHSA-2022:0841",
      "https://access.redhat.com/errata/RHSA-2022:0849",
      "https://access.redhat.com/errata/RHSA-2022:0851"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-0920"
      ],
      "details": "In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel",
      "id": "GSD-2021-0920",
      "modified": "2023-12-13T01:23:07.495264Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "security@android.com",
        "ID": "CVE-2021-0920",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Android",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "Android kernel"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "Elevation of privilege"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://source.android.com/security/bulletin/2021-11-01",
            "refsource": "MISC",
            "url": "https://source.android.com/security/bulletin/2021-11-01"
          },
          {
            "name": "[debian-lts-announce] 20211216 [SECURITY] [DLA 2843-1] linux security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "cisaActionDue": "2022-06-13",
        "cisaExploitAdd": "2022-05-23",
        "cisaRequiredAction": "Apply updates per vendor instructions.",
        "cisaVulnerabilityName": "Android Kernel Race Condition Vulnerability",
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:google:android:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "8255F035-04C8-4158-B301-82101711939C",
                    "vulnerable": true
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                ],
                "negate": false,
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          {
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                "negate": false,
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        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel"
          },
          {
            "lang": "es",
            "value": "En la funci\u00f3n unix_scm_to_skb del archivo af_unix.c, se presenta un posible error de uso de memoria previamente liberada debido a una condici\u00f3n de carrera. Esto podr\u00eda conllevar a una escalada local de privilegios con los privilegios de ejecuci\u00f3n System requeridos. No es requerida una interacci\u00f3n del usuario para su explotaci\u00f3n. Producto: Android. Versiones: Android kernel. ID de Android: A-196926917 Referencias: Kernel ascendente"
          }
        ],
        "id": "CVE-2021-0920",
        "lastModified": "2024-02-02T16:46:32.023",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 6.9,
                "confidentialityImpact": "COMPLETE",
                "integrityImpact": "COMPLETE",
                "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 3.4,
              "impactScore": 10.0,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
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              "cvssData": {
                "attackComplexity": "HIGH",
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                "baseScore": 6.4,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "HIGH",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 0.5,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
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          ]
        },
        "published": "2021-12-15T19:15:11.017",
        "references": [
          {
            "source": "security@android.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html"
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            "tags": [
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            "url": "https://source.android.com/security/bulletin/2021-11-01"
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        "sourceIdentifier": "security@android.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
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                "lang": "en",
                "value": "CWE-362"
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              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}


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