fkie_cve-2021-21284
Vulnerability from fkie_nvd
Published
2021-02-02 18:15
Modified
2024-11-21 05:47
Severity ?
6.8 (Medium) - CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
6.8 (Medium) - CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Summary
In Docker before versions 9.03.15, 20.10.3 there is a vulnerability involving the --userns-remap option in which access to remapped root allows privilege escalation to real root. When using "--userns-remap", if the root user in the remapped namespace has access to the host filesystem they can modify files under "/var/lib/docker/<remapping>" that cause writing files with extended privileges. Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.
References
security-advisories@github.comhttps://docs.docker.com/engine/release-notes/#20103Release Notes, Vendor Advisory
security-advisories@github.comhttps://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7cPatch, Third Party Advisory
security-advisories@github.comhttps://github.com/moby/moby/releases/tag/v19.03.15Release Notes, Third Party Advisory
security-advisories@github.comhttps://github.com/moby/moby/releases/tag/v20.10.3Release Notes, Third Party Advisory
security-advisories@github.comhttps://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpcThird Party Advisory
security-advisories@github.comhttps://security.gentoo.org/glsa/202107-23Patch, Third Party Advisory
security-advisories@github.comhttps://security.netapp.com/advisory/ntap-20210226-0005/Third Party Advisory
security-advisories@github.comhttps://www.debian.org/security/2021/dsa-4865Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://docs.docker.com/engine/release-notes/#20103Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7cPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/moby/moby/releases/tag/v19.03.15Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/moby/moby/releases/tag/v20.10.3Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpcThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202107-23Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210226-0005/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2021/dsa-4865Third Party Advisory
Impacted products
Vendor Product Version
docker docker *
docker docker *
debian debian_linux 10.0
netapp e-series_santricity_os_controller *


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:a:docker:docker:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "C6B22016-AB78-4E82-9F65-AEC2526F3EDF",
                     versionEndExcluding: "19.03.15",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:docker:docker:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "B4427D14-D219-490B-8467-40FE253775A1",
                     versionEndExcluding: "20.10.3",
                     versionStartIncluding: "20.0.0",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                     matchCriteriaId: "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
                     vulnerable: true,
                  },
               ],
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               operator: "OR",
            },
         ],
      },
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "BD1E9594-C46F-40D1-8BC2-6B16635B55C4",
                     versionEndIncluding: "11.60.3",
                     versionStartIncluding: "11.0.0",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "In Docker before versions 9.03.15, 20.10.3 there is a vulnerability involving the --userns-remap option in which access to remapped root allows privilege escalation to real root. When using \"--userns-remap\", if the root user in the remapped namespace has access to the host filesystem they can modify files under \"/var/lib/docker/<remapping>\" that cause writing files with extended privileges. Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.",
      },
      {
         lang: "es",
         value: "En Docker versiones anteriores a 9.03.15, 20.10.3, se presenta una vulnerabilidad que involucra la opción --userns-remap en la que un acceso a una root reasignada permite una escalada de privilegios a la root actual.&#xa0;Cuando se usa \"--userns-remap\", si el usuario root en el espacio de nombres reasignado tiene acceso al sistema de archivos del host, puede modificar archivos en \"/var/lib/docker/(remapping)\" que causa la escritura de archivos con privilegios extendidos.&#xa0;Las versiones 20.10.3 y 19.03.15 contienen parches que evitan una escalada de privilegios del usuario reasignado",
      },
   ],
   id: "CVE-2021-21284",
   lastModified: "2024-11-21T05:47:55.867",
   metrics: {
      cvssMetricV2: [
         {
            acInsufInfo: false,
            baseSeverity: "LOW",
            cvssData: {
               accessComplexity: "LOW",
               accessVector: "ADJACENT_NETWORK",
               authentication: "SINGLE",
               availabilityImpact: "NONE",
               baseScore: 2.7,
               confidentialityImpact: "NONE",
               integrityImpact: "PARTIAL",
               vectorString: "AV:A/AC:L/Au:S/C:N/I:P/A:N",
               version: "2.0",
            },
            exploitabilityScore: 5.1,
            impactScore: 2.9,
            obtainAllPrivilege: false,
            obtainOtherPrivilege: false,
            obtainUserPrivilege: false,
            source: "nvd@nist.gov",
            type: "Primary",
            userInteractionRequired: false,
         },
      ],
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "ADJACENT_NETWORK",
               availabilityImpact: "NONE",
               baseScore: 6.8,
               baseSeverity: "MEDIUM",
               confidentialityImpact: "NONE",
               integrityImpact: "HIGH",
               privilegesRequired: "LOW",
               scope: "CHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
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            },
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            impactScore: 4,
            source: "security-advisories@github.com",
            type: "Secondary",
         },
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "ADJACENT_NETWORK",
               availabilityImpact: "NONE",
               baseScore: 6.8,
               baseSeverity: "MEDIUM",
               confidentialityImpact: "NONE",
               integrityImpact: "HIGH",
               privilegesRequired: "LOW",
               scope: "CHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
               version: "3.1",
            },
            exploitabilityScore: 2.3,
            impactScore: 4,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2021-02-02T18:15:11.827",
   references: [
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         source: "security-advisories@github.com",
         tags: [
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         url: "https://docs.docker.com/engine/release-notes/#20103",
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      {
         source: "security-advisories@github.com",
         tags: [
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         url: "https://github.com/moby/moby/releases/tag/v20.10.3",
      },
      {
         source: "security-advisories@github.com",
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      },
      {
         source: "security-advisories@github.com",
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      {
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         tags: [
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         url: "https://security.netapp.com/advisory/ntap-20210226-0005/",
      },
      {
         source: "security-advisories@github.com",
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         url: "https://www.debian.org/security/2021/dsa-4865",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
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         source: "af854a3a-2127-422b-91ae-364da2661108",
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         url: "https://www.debian.org/security/2021/dsa-4865",
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   ],
   sourceIdentifier: "security-advisories@github.com",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-22",
            },
         ],
         source: "security-advisories@github.com",
         type: "Secondary",
      },
      {
         description: [
            {
               lang: "en",
               value: "CWE-22",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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