gsd-2021-20321
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
Aliases
Aliases
CVE-2021-20321


To clipboard 

{
   GSD: {
      alias: "CVE-2021-20321",
      description: "A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.",
      id: "GSD-2021-20321",
      references: [
         "https://www.suse.com/security/cve/CVE-2021-20321.html",
         "https://www.debian.org/security/2022/dsa-5096",
         "https://access.redhat.com/errata/RHSA-2021:5241",
         "https://access.redhat.com/errata/RHSA-2021:5227",
         "https://ubuntu.com/security/CVE-2021-20321",
         "https://advisories.mageia.org/CVE-2021-20321.html",
         "https://security.archlinux.org/CVE-2021-20321",
         "https://linux.oracle.com/cve/CVE-2021-20321.html",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2021-20321",
         ],
         details: "A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.",
         id: "GSD-2021-20321",
         modified: "2023-12-13T01:23:12.620795Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "secalert@redhat.com",
            ID: "CVE-2021-20321",
            STATE: "PUBLIC",
         },
         affects: {
            vendor: {
               vendor_data: [
                  {
                     product: {
                        product_data: [
                           {
                              product_name: "kernel",
                              version: {
                                 version_data: [
                                    {
                                       version_value: "kernel 5.15-rc5",
                                    },
                                 ],
                              },
                           },
                        ],
                     },
                     vendor_name: "n/a",
                  },
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         data_version: "4.0",
         description: {
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               },
            ],
         },
         problemtype: {
            problemtype_data: [
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                        value: "CWE-362",
                     },
                  ],
               },
            ],
         },
         references: {
            reference_data: [
               {
                  name: "https://bugzilla.redhat.com/show_bug.cgi?id=2013242",
                  refsource: "MISC",
                  url: "https://bugzilla.redhat.com/show_bug.cgi?id=2013242",
               },
               {
                  name: "https://lore.kernel.org/all/20211011134508.748956131@linuxfoundation.org/",
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               },
               {
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               },
               {
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                  refsource: "DEBIAN",
                  url: "https://www.debian.org/security/2022/dsa-5096",
               },
            ],
         },
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
            nodes: [
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:5.15:-:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndExcluding: "5.15",
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                  operator: "OR",
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                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
                        cpe_name: [],
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                  ],
                  operator: "OR",
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               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
            ],
         },
         cve: {
            CVE_data_meta: {
               ASSIGNER: "secalert@redhat.com",
               ID: "CVE-2021-20321",
            },
            data_format: "MITRE",
            data_type: "CVE",
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            description: {
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            },
            problemtype: {
               problemtype_data: [
                  {
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                           value: "CWE-362",
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            references: {
               reference_data: [
                  {
                     name: "https://bugzilla.redhat.com/show_bug.cgi?id=2013242",
                     refsource: "MISC",
                     tags: [
                        "Issue Tracking",
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                     ],
                     url: "https://bugzilla.redhat.com/show_bug.cgi?id=2013242",
                  },
                  {
                     name: "https://lore.kernel.org/all/20211011134508.748956131@linuxfoundation.org/",
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                     ],
                     url: "https://lore.kernel.org/all/20211011134508.748956131@linuxfoundation.org/",
                  },
                  {
                     name: "[debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security update",
                     refsource: "MLIST",
                     tags: [
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                     ],
                     url: "https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html",
                  },
                  {
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                     ],
                     url: "https://www.debian.org/security/2022/dsa-5096",
                  },
               ],
            },
         },
         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "MEDIUM",
                  accessVector: "LOCAL",
                  authentication: "NONE",
                  availabilityImpact: "COMPLETE",
                  baseScore: 4.7,
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  vectorString: "AV:L/AC:M/Au:N/C:N/I:N/A:C",
                  version: "2.0",
               },
               exploitabilityScore: 3.4,
               impactScore: 6.9,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "MEDIUM",
               userInteractionRequired: false,
            },
            baseMetricV3: {
               cvssV3: {
                  attackComplexity: "HIGH",
                  attackVector: "LOCAL",
                  availabilityImpact: "HIGH",
                  baseScore: 4.7,
                  baseSeverity: "MEDIUM",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  version: "3.1",
               },
               exploitabilityScore: 1,
               impactScore: 3.6,
            },
         },
         lastModifiedDate: "2022-05-11T14:20Z",
         publishedDate: "2022-02-18T18:15Z",
      },
   },
}


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