Vulnerability-Lookup

GHSA-6QFG-8799-R575

Vulnerability from github – Published: 2021-05-18 15:30 – Updated: 2023-09-18 20:30

Summary

Kubernetes kubectl cp Vulnerable to Symlink Attack

Details

The Kubernetes kubectl cp command in versions 1.1-1.12, and versions prior to 1.13.11, 1.14.7, and 1.15.4 allows a combination of two symlinks provided by tar output of a malicious container to place a file outside of the destination directory specified in the kubectl cp invocation. This could be used to allow an attacker to place a nefarious file using a symlink, outside of the destination tree.

Severity

5.7 (Medium)


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

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "k8s.io/kubernetes"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.13.10"
            },
            {
              "fixed": "1.13.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "k8s.io/kubernetes"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.14.6"
            },
            {
              "fixed": "1.14.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "k8s.io/kubernetes"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.15.3"
            },
            {
              "fixed": "1.16.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2019-11251"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59",
      "CWE-61"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-17T21:58:06Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "The Kubernetes kubectl cp command in versions 1.1-1.12, and versions prior to 1.13.11, 1.14.7, and 1.15.4 allows a combination of two symlinks provided by tar output of a malicious container to place a file outside of the destination directory specified in the kubectl cp invocation. This could be used to allow an attacker to place a nefarious file using a symlink, outside of the destination tree.",
  "id": "GHSA-6qfg-8799-r575",
  "modified": "2023-09-18T20:30:39Z",
  "published": "2021-05-18T15:30:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-11251"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubernetes/kubernetes/issues/87773"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubernetes/kubernetes/pull/82143"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/d/msg/kubernetes-announce/YYtEFdFimZ4/nZnOezZuBgAJ"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Kubernetes kubectl cp Vulnerable to Symlink Attack"
}

CVE-2019-11251 (GCVE-0-2019-11251)

Vulnerability from cvelistv5 – Published: 2020-02-03 15:35 – Updated: 2024-08-04 22:48

Title

kubectl cp allows symlink directory traversal

Summary

Severity

4.8 (Medium)


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

CWE

CWE-61 - UNIX Symbolic Link (Symlink) Following

Assigner

kubernetes CNA under the mitre root

CNA scorecard – unranked: 2 records in the last 180 days, 10 needed details

References

2 references

URL	Tags
https://github.com/kubernetes/kubernetes/issues/87773	x_refsource_CONFIRM
https://groups.google.com/d/msg/kubernetes-announ…	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version
Kubernetes	Kubernetes	Affected: prior to 1.13.11 Affected: prior to 1.14.7 Affected: prior to 1.15.4 Affected: 1.1 Affected: 1.2 Affected: 1.3 Affected: 1.4 Affected: 1.5 Affected: 1.6 Affected: 1.7 Affected: 1.8 Affected: 1.9 Affected: 1.10 Affected: 1.11 Affected: 1.12

Credits

Erik Sjölund

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T22:48:09.005Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/kubernetes/kubernetes/issues/87773"
          },
          {
            "name": "Security release of kubectl versions v1.16.0 / 1.15.4 / 1.14.7 and 1.13.11 - CVE-2019-11251",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://groups.google.com/d/msg/kubernetes-announce/YYtEFdFimZ4/nZnOezZuBgAJ"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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          "product": "Kubernetes",
          "vendor": "Kubernetes",
          "versions": [
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              "status": "affected",
              "version": "prior to 1.13.11"
            },
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              "status": "affected",
              "version": "prior to 1.14.7"
            },
            {
              "status": "affected",
              "version": "prior to 1.15.4"
            },
            {
              "status": "affected",
              "version": "1.1"
            },
            {
              "status": "affected",
              "version": "1.2"
            },
            {
              "status": "affected",
              "version": "1.3"
            },
            {
              "status": "affected",
              "version": "1.4"
            },
            {
              "status": "affected",
              "version": "1.5"
            },
            {
              "status": "affected",
              "version": "1.6"
            },
            {
              "status": "affected",
              "version": "1.7"
            },
            {
              "status": "affected",
              "version": "1.8"
            },
            {
              "status": "affected",
              "version": "1.9"
            },
            {
              "status": "affected",
              "version": "1.10"
            },
            {
              "status": "affected",
              "version": "1.11"
            },
            {
              "status": "affected",
              "version": "1.12"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Erik Sj\u00f6lund"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Kubernetes kubectl cp command in versions 1.1-1.12, and versions prior to 1.13.11, 1.14.7, and 1.15.4 allows a combination of two symlinks provided by tar output of a malicious container to place a file outside of the destination directory specified in the kubectl cp invocation. This could be used to allow an attacker to place a nefarious file using a symlink, outside of the destination tree."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-61",
              "description": "CWE-61: UNIX Symbolic Link (Symlink) Following",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-02-03T15:35:13.000Z",
        "orgId": "a6081bf6-c852-4425-ad4f-a67919267565",
        "shortName": "kubernetes"
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          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://groups.google.com/d/msg/kubernetes-announce/YYtEFdFimZ4/nZnOezZuBgAJ"
        }
      ],
      "source": {
        "defect": [
          "https://github.com/kubernetes/kubernetes/issues/87773"
        ],
        "discovery": "USER"
      },
      "title": "kubectl cp allows symlink directory traversal",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@kubernetes.io",
          "ID": "CVE-2019-11251",
          "STATE": "PUBLIC",
          "TITLE": "kubectl cp allows symlink directory traversal"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
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                    {
                      "product_name": "Kubernetes",
                      "version": {
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                          {
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                          },
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                          {
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                          {
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                          {
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                          {
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                "vendor_name": "Kubernetes"
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        },
        "credit": [
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  "cveMetadata": {
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  "dataVersion": "5.1"
}

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.

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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.

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