Vulnerability-Lookup

OESA-2021-1102 (CVE-2021-21284)

Vulnerability from osv_openeuler – Published: 2021-04-07 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

docker security update

Details

Docker is an open source project to build, ship and run any application as a lightweight container. Docker containers are both hardware-agnostic and platform-agnostic. This means they can run anywhere, from your laptop to the largest EC2 compute instance and everything in between - and they don't require you to use a particular language, framework or packaging system. That makes them great building blocks for deploying and scaling web apps, databases, and backend services without depending on a particular stack or provider.

Security Fix(es):

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.(CVE-2021-21284)

In Docker before versions 9.03.15, 20.10.3 there is a vulnerability in which pulling an intentionally malformed Docker image manifest crashes the dockerd daemon. Versions 20.10.3 and 19.03.15 contain patches that prevent the daemon from crashing.(CVE-2021-21285)

Severity

6.8 (Medium)


                    
                      CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

References

URL

Type

	https://openeuler.org/en/security/safety-bulletin…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-21284	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-21285	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "docker-engine-18.09.0-202.oe1.aarch64.rpm",
          "docker-engine-18.09.0-202.oe1.aarch64.rpm"
        ],
        "src": [
          "docker-engine-18.09.0-202.oe1.src.rpm",
          "docker-engine-18.09.0-202.oe1.src.rpm"
        ],
        "x86_64": [
          "docker-engine-18.09.0-202.oe1.x86_64.rpm",
          "docker-engine-18.09.0-202.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS",
        "name": "docker",
        "purl": "pkg:rpm/openEuler/docker\u0026distro=openEuler-20.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "engine-18.09.0-202.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "docker-engine-18.09.0-202.oe1.aarch64.rpm"
        ],
        "src": [
          "docker-engine-18.09.0-202.oe1.src.rpm"
        ],
        "x86_64": [
          "docker-engine-18.09.0-202.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "docker",
        "purl": "pkg:rpm/openEuler/docker\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "engine-18.09.0-202.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Docker is an open source project to build, ship and run any application as a lightweight container. Docker containers are both hardware-agnostic and platform-agnostic. This means they can run anywhere, from your laptop to the largest EC2 compute instance and everything in between - and they don\u0027t require you to use a particular language, framework or packaging system. That makes them great building blocks for deploying and scaling web apps, databases, and backend services without depending on a particular stack or provider.\r\n\r\nSecurity Fix(es):\r\n\r\nIn 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/\u0026lt;remapping\u0026gt; that cause writing files with extended privileges. Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.(CVE-2021-21284)\r\n\r\nIn Docker before versions 9.03.15, 20.10.3 there is a vulnerability in which pulling an intentionally malformed Docker image manifest crashes the dockerd daemon. Versions 20.10.3 and 19.03.15 contain patches that prevent the daemon from crashing.(CVE-2021-21285)",
  "id": "OESA-2021-1102",
  "modified": "2026-08-06T11:04:20Z",
  "published": "2021-04-07T11:04:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1102"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21284"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21285"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "docker security update",
  "upstream": [
    "CVE-2021-21284",
    "CVE-2021-21285"
  ]
}

CVE-2021-21284 (GCVE-0-2021-21284)

Vulnerability from cvelistv5 – Published: 2021-02-02 17:55 – Updated: 2024-08-03 18:09

Title

privilege escalation in Moby

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.

Severity

6.8 (Medium)


                        
                          CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7626 records in the last 180 days details

References

8 references

URL	Tags
https://docs.docker.com/engine/release-notes/#20103	x_refsource_MISC
https://github.com/moby/moby/releases/tag/v20.10.3	x_refsource_MISC
https://github.com/moby/moby/releases/tag/v19.03.15	x_refsource_MISC
https://github.com/moby/moby/security/advisories/…	x_refsource_CONFIRM
https://github.com/moby/moby/commit/64bd4485b3a66…	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021022…	x_refsource_CONFIRM
https://www.debian.org/security/2021/dsa-4865	vendor-advisoryx_refsource_DEBIAN
https://security.gentoo.org/glsa/202107-23	vendor-advisoryx_refsource_GENTOO

Impacted products

1 product

Vendor	Product	Version
moby	moby	Affected: < 19.03.15 Affected: >= 20.0.0, < 20.10.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:09:15.042Z",
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            "url": "https://github.com/moby/moby/releases/tag/v19.03.15"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
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          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7c"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210226-0005/"
          },
          {
            "name": "DSA-4865",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
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            "url": "https://www.debian.org/security/2021/dsa-4865"
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            "name": "GLSA-202107-23",
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              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202107-23"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "moby",
          "vendor": "moby",
          "versions": [
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              "version": "\u003c 19.03.15"
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
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            "integrityImpact": "HIGH",
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      "providerMetadata": {
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          "url": "https://github.com/moby/moby/releases/tag/v19.03.15"
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          "url": "https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7c"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210226-0005/"
        },
        {
          "name": "DSA-4865",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2021/dsa-4865"
        },
        {
          "name": "GLSA-202107-23",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/202107-23"
        }
      ],
      "source": {
        "advisory": "GHSA-7452-xqpj-6rpc",
        "discovery": "UNKNOWN"
      },
      "title": "privilege escalation in Moby",
      "x_legacyV4Record": {
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          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-21284",
          "STATE": "PUBLIC",
          "TITLE": "privilege escalation in Moby"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "moby",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003c 19.03.15"
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            },
            {
              "name": "https://github.com/moby/moby/releases/tag/v20.10.3",
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            },
            {
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}

CVE-2021-21285 (GCVE-0-2021-21285)

Vulnerability from cvelistv5 – Published: 2021-02-02 17:55 – Updated: 2024-08-03 18:09

Title

Docker daemon crash during image pull of malicious image

Summary

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7626 records in the last 180 days details

References

8 references

URL	Tags
https://github.com/moby/moby/security/advisories/…	x_refsource_CONFIRM
https://docs.docker.com/engine/release-notes/#20103	x_refsource_MISC
https://github.com/moby/moby/releases/tag/v20.10.3	x_refsource_MISC
https://github.com/moby/moby/releases/tag/v19.03.15	x_refsource_MISC
https://github.com/moby/moby/commit/8d3179546e790…	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021022…	x_refsource_CONFIRM
https://www.debian.org/security/2021/dsa-4865	vendor-advisoryx_refsource_DEBIAN
https://security.gentoo.org/glsa/202107-23	vendor-advisoryx_refsource_GENTOO

Impacted products

1 product

Vendor	Product	Version
moby	moby	Affected: < 19.03.15 Affected: >= 20.0.0, < 20.10.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:09:15.012Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        },
        "references": [
          {
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              "x_transferred"
            ],
            "url": "https://github.com/moby/moby/security/advisories/GHSA-6fj5-m822-rqx8"
          },
          {
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              "x_refsource_MISC",
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            ],
            "url": "https://docs.docker.com/engine/release-notes/#20103"
          },
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              "x_refsource_MISC",
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            "url": "https://github.com/moby/moby/releases/tag/v20.10.3"
          },
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://github.com/moby/moby/releases/tag/v19.03.15"
          },
          {
            "tags": [
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          },
          {
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              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210226-0005/"
          },
          {
            "name": "DSA-4865",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2021/dsa-4865"
          },
          {
            "name": "GLSA-202107-23",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202107-23"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "moby",
          "vendor": "moby",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 19.03.15"
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            }
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          "value": "In Docker before versions 9.03.15, 20.10.3 there is a vulnerability in which pulling an intentionally malformed Docker image manifest crashes the dockerd daemon. Versions 20.10.3 and 19.03.15 contain patches that prevent the daemon from crashing."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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              "description": "CWE-400 Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2021-1102 (CVE-2021-21284)

CVE-2021-21284 (GCVE-0-2021-21284)

CVE-2021-21285 (GCVE-0-2021-21285)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour