gsd-2021-21284
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
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.
Aliases
Aliases
CVE-2021-21284


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-21284",
    "description": "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/\u003cremapping\u003e\" that cause writing files with extended privileges. Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.",
    "id": "GSD-2021-21284",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-21284.html",
      "https://www.debian.org/security/2021/dsa-4865",
      "https://security.archlinux.org/CVE-2021-21284",
      "https://alas.aws.amazon.com/cve/html/CVE-2021-21284.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-21284"
      ],
      "details": "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/\u003cremapping\u003e\" that cause writing files with extended privileges. Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.",
      "id": "GSD-2021-21284",
      "modified": "2023-12-13T01:23:10.576438Z",
      "schema_version": "1.4.0"
    }
  },
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        "TITLE": "privilege escalation in Moby"
      },
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            {
              "product": {
                "product_data": [
                  {
                    "product_name": "moby",
                    "version": {
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                          "version_value": "\u003c 19.03.15"
                        },
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                          "version_value": "\u003e= 20.0.0, \u003c 20.10.3"
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          }
        ]
      },
      "impact": {
        "cvss": {
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          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
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          "privilegesRequired": "LOW",
          "scope": "CHANGED",
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          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
          "version": "3.1"
        }
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              }
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      },
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          }
        ]
      },
      "source": {
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        "discovery": "UNKNOWN"
      }
    },
    "nvd.nist.gov": {
      "configurations": {
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        "nodes": [
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            "operator": "OR"
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          {
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          },
          {
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            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*",
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          "ID": "CVE-2021-21284"
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        "description": {
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            }
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "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,
          "severity": "LOW",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "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": 4.0
        }
      },
      "lastModifiedDate": "2022-04-29T19:22Z",
      "publishedDate": "2021-02-02T18:15Z"
    }
  }
}


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