cvelistv5 - cve-2023-23939

CVE-2023-23939 (GCVE-0-2023-23939)

Vulnerability from cvelistv5 – Published: 2023-03-06 18:19 – Updated: 2025-02-25 15:00

Summary

Azure/setup-kubectl is a GitHub Action for installing Kubectl. This vulnerability only impacts versions before version 3. An insecure temporary creation of a file allows other actors on the Actions runner to replace the Kubectl binary created by this action because it is world writable. This Kubectl tool installer runs `fs.chmodSync(kubectlPath, 777)` to set permissions on the Kubectl binary, however, this allows any local user to replace the Kubectl binary. This allows privilege escalation to the user that can also run kubectl, most likely root. This attack is only possible if an attacker somehow breached the GitHub actions runner or if a user is utilizing an Action that maliciously executes this attack. This has been fixed and released in all versions `v3` and later. 775 permissions are used instead. Users are advised to upgrade. There are no known workarounds for this issue.

Severity ?

3.9 (Low)


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

CWE

CWE-732 - Incorrect Permission Assignment for Critical Resource

Assigner

GitHub_M

References

URL

Tags

	https://github.com/Azure/setup-kubectl/security/a…	x_refsource_CONFIRM
	https://github.com/Azure/setup-kubectl/commit/d44…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	Azure	setup-kubectl	Affected: < 3

Show details on NVD website

JSON

To clipboard

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GHSA-P756-RFXH-X63H

Vulnerability from github – Published: 2023-03-07 20:07 – Updated: 2023-03-07 20:07

Summary

Azure/setup-kubectl: Escalation of privilege vulnerability for v3 and lower

Details

Impact

This vulnerability only impacts versions v2 and lower. An insecure temporary creation of a file allows other actors on the Actions runner to replace the Kubectl binary created by this action because it is world writable. This Kubectl tool installer runs fs.chmodSync(kubectlPath, 777) to set permissions on the Kubectl binary, however, this allows any local user to replace the Kubectl binary. This allows privilege escalation to the user that can also run kubectl, most likely root. This attack is only possible if an attacker somehow breached the GitHub actions runner or if a user is utilizing an Action that maliciously executes this attack.

No impacted customers have been reported.

Patches

This has been fixed and released in all versions v3 and later. 755 permissions are used instead.

Workarounds

If users absolutely cannot upgrade to v3 or higher than they should be extra diligent of the other GitHub actions they are using in a workflow and ensure that their GitHub actions runner is secure.

Severity ?

3.0 (Low)


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

Show details on source website

JSON

To clipboard

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      "package": {
        "ecosystem": "GitHub Actions",
        "name": "Azure/setup-kubectl"
      },
      "ranges": [
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          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-23939"
  ],
  "database_specific": {
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    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-03-07T20:07:27Z",
    "nvd_published_at": "2023-03-06T19:15:00Z",
    "severity": "LOW"
  },
  "details": "### Impact\n\nThis vulnerability only impacts versions `v2` and lower. An insecure temporary creation of a file allows other actors on the Actions runner to replace the Kubectl binary created by this action because it is world writable. This Kubectl tool installer runs `fs.chmodSync(kubectlPath, 777)` to set permissions on the Kubectl binary, however, this allows any local user to replace the Kubectl binary. This allows privilege escalation to the user that can also run kubectl, most likely root. This attack is only possible if an attacker somehow breached the GitHub actions runner or if a user is utilizing an Action that maliciously executes this attack.\n\nNo impacted customers have been reported.\n\n### Patches\n\nThis has been fixed and released in all versions `v3` and later. 755 permissions are used instead.\n\n### Workarounds\n\nIf users absolutely cannot upgrade to `v3` or higher than they should be extra diligent of the other GitHub actions they are using in a workflow and ensure that their GitHub actions runner is secure.\n",
  "id": "GHSA-p756-rfxh-x63h",
  "modified": "2023-03-07T20:07:27Z",
  "published": "2023-03-07T20:07:27Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Azure/setup-kubectl/security/advisories/GHSA-p756-rfxh-x63h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-23939"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Azure/setup-kubectl/commit/d449d75495d2b9d1463555bb00ca3dca77a42ab6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Azure/setup-kubectl"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Azure/setup-kubectl: Escalation of privilege vulnerability for v3 and lower"
}

FKIE_CVE-2023-23939

Vulnerability from fkie_nvd - Published: 2023-03-06 19:15 - Updated: 2024-11-21 07:47

Severity ?

3.9 (Low) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/Azure/setup-kubectl/commit/d449d75495d2b9d1463555bb00ca3dca77a42ab6	Patch
security-advisories@github.com	https://github.com/Azure/setup-kubectl/security/advisories/GHSA-p756-rfxh-x63h	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/Azure/setup-kubectl/commit/d449d75495d2b9d1463555bb00ca3dca77a42ab6	Patch
af854a3a-2127-422b-91ae-364da2661108	https://github.com/Azure/setup-kubectl/security/advisories/GHSA-p756-rfxh-x63h	Vendor Advisory

Impacted products

	Vendor	Product	Version
	microsoft	azure_setup_kubectl	*

JSON

To clipboard

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Azure/setup-kubectl is a GitHub Action for installing Kubectl. This vulnerability only impacts versions before version 3. An insecure temporary creation of a file allows other actors on the Actions runner to replace the Kubectl binary created by this action because it is world writable. This Kubectl tool installer runs `fs.chmodSync(kubectlPath, 777)` to set permissions on the Kubectl binary, however, this allows any local user to replace the Kubectl binary. This allows privilege escalation to the user that can also run kubectl, most likely root. This attack is only possible if an attacker somehow breached the GitHub actions runner or if a user is utilizing an Action that maliciously executes this attack. This has been fixed and released in all versions `v3` and later. 775 permissions are used instead. Users are advised to upgrade. There are no known workarounds for this issue.\n"
    }
  ],
  "id": "CVE-2023-23939",
  "lastModified": "2024-11-21T07:47:08.613",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 3.9,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 0.5,
        "impactScore": 3.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2023-03-06T19:15:10.297",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/Azure/setup-kubectl/commit/d449d75495d2b9d1463555bb00ca3dca77a42ab6"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/Azure/setup-kubectl/security/advisories/GHSA-p756-rfxh-x63h"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/Azure/setup-kubectl/commit/d449d75495d2b9d1463555bb00ca3dca77a42ab6"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/Azure/setup-kubectl/security/advisories/GHSA-p756-rfxh-x63h"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-732"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

GSD-2023-23939

Vulnerability from gsd - Updated: 2023-12-13 01:20

Details

Aliases

CVE-2023-23939

Aliases

CVE-2023-23939

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2023-23939",
    "id": "GSD-2023-23939"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-23939"
      ],
      "details": "Azure/setup-kubectl is a GitHub Action for installing Kubectl. This vulnerability only impacts versions before version 3. An insecure temporary creation of a file allows other actors on the Actions runner to replace the Kubectl binary created by this action because it is world writable. This Kubectl tool installer runs `fs.chmodSync(kubectlPath, 777)` to set permissions on the Kubectl binary, however, this allows any local user to replace the Kubectl binary. This allows privilege escalation to the user that can also run kubectl, most likely root. This attack is only possible if an attacker somehow breached the GitHub actions runner or if a user is utilizing an Action that maliciously executes this attack. This has been fixed and released in all versions `v3` and later. 775 permissions are used instead. Users are advised to upgrade. There are no known workarounds for this issue.",
      "id": "GSD-2023-23939",
      "modified": "2023-12-13T01:20:49.900181Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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          "vendor_data": [
            {
              "product": {
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                  {
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                    "version": {
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                        {
                          "version_affected": "=",
                          "version_value": "\u003c 3"
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                    }
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            }
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          }
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      },
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            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 3.9,
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      },
      "problemtype": {
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              }
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          }
        ]
      },
      "references": {
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          {
            "name": "https://github.com/Azure/setup-kubectl/security/advisories/GHSA-p756-rfxh-x63h",
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          },
          {
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    },
    "nvd.nist.gov": {
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                "versionEndExcluding": "3.0",
                "vulnerable": true
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            ],
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            }
          ]
        },
        "problemtype": {
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              ],
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            },
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      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "HIGH",
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            "integrityImpact": "HIGH",
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            "version": "3.1"
          },
          "exploitabilityScore": 1.0,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2023-03-13T17:49Z",
      "publishedDate": "2023-03-06T19:15Z"
    }
  }
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2023-23939 (GCVE-0-2023-23939)

GHSA-P756-RFXH-X63H

Impact

Patches

Workarounds

FKIE_CVE-2023-23939

GSD-2023-23939

Tags

Sightings

Nomenclature