certfr_avis - CERTFR-2021-AVI-884

CERTFR-2021-AVI-884

Vulnerability from certfr_avis - Published: - Updated:

Une vulnérabilité a été découverte dans Microsoft Azure Active Directory. Elle permet à un attaquant de provoquer une atteinte à la confidentialité des données.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

Vendor	Product	Description
Microsoft	Azure	Azure Migrate
Microsoft	Azure	Azure Automation
Microsoft	Azure	Azure Site Recovery
Microsoft	Azure	Azure Active Directory

References

Title

Publication Time

Tags

Bulletin de sécurité Microsoft CVE-2021-42306 du 17 novembre 2021	None	vendor-advisory
Billet de blogue Microsoft MSRC	-	other

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Azure Migrate",
      "product": {
        "name": "Azure",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Azure Automation",
      "product": {
        "name": "Azure",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Azure Site Recovery",
      "product": {
        "name": "Azure",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Azure Active Directory",
      "product": {
        "name": "Azure",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": null,
  "content": "## Solution\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des\ncorrectifs (cf. section Documentation).\n",
  "cves": [
    {
      "name": "CVE-2021-42306",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-42306"
    }
  ],
  "links": [
    {
      "title": "Billet de blogue Microsoft MSRC",
      "url": "https://msrc-blog.microsoft.com/2021/11/17/guidance-for-azure-active-directory-ad-keycredential-property-information-disclosure-in-application-and-service-principal-apis/"
    }
  ],
  "reference": "CERTFR-2021-AVI-884",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2021-11-18T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
    }
  ],
  "summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Microsoft Azure Active\nDirectory. Elle permet \u00e0 un attaquant de provoquer une atteinte \u00e0 la\nconfidentialit\u00e9 des donn\u00e9es.\n\n\u00a0\n",
  "title": "Vuln\u00e9rabilit\u00e9 dans Microsoft Azure Active Directory",
  "vendor_advisories": [
    {
      "published_at": null,
      "title": "Bulletin de s\u00e9curit\u00e9 Microsoft CVE-2021-42306 du 17 novembre 2021",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42306"
    }
  ]
}

CVE-2021-42306 (GCVE-0-2021-42306)

Vulnerability from cvelistv5 – Published: 2021-11-24 01:05 – Updated: 2024-08-04 03:30

Title

Azure Active Directory Information Disclosure Vulnerability

Summary

An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication certificate keyCredential  on an Azure AD Application or Service Principal (which is not recommended). This vulnerability allows a user or service in the tenant with application read access to read the private key data that was added to the application. Azure AD addressed this vulnerability by preventing disclosure of any private key values added to the application. Microsoft has identified services that could manifest this vulnerability, and steps that customers should take to be protected. Refer to the FAQ section for more information. For more details on this issue, please refer to the MSRC Blog Entry.

Severity ?

8.1 (High)


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

CWE

Elevation of Privilege

Assigner

microsoft

References

URL

Tags

https://portal.msrc.microsoft.com/en-US/security-…

x_refsource_MISC

Impacted products

Vendor

Product

Version

Microsoft

Azure Automation

Affected: 1.0.0 , < publication (custom)
cpe:2.3:a:microsoft:azure_automation:-:*:*:*:*:*:*:*

Microsoft	Azure Active Directory	Affected: N/A
Microsoft	Azure Site Recovery	Affected: N/A
Microsoft	Azure Migrate	Affected: N/A

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T03:30:38.252Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42306"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:microsoft:azure_automation:-:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": "Azure Automation",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "publication",
              "status": "affected",
              "version": "1.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [],
          "platforms": [
            "Unknown"
          ],
          "product": "Azure Active Directory",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "N/A"
            }
          ]
        },
        {
          "cpes": [],
          "platforms": [
            "Unknown"
          ],
          "product": "Azure Site Recovery",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "N/A"
            }
          ]
        },
        {
          "cpes": [],
          "platforms": [
            "Unknown"
          ],
          "product": "Azure Migrate",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "N/A"
            }
          ]
        }
      ],
      "datePublic": "2021-11-17T08:00:00+00:00",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication certificate keyCredential\u202f on an Azure AD Application or Service Principal (which is not recommended). This vulnerability allows a user or service in the tenant with application read access to read the private key data that was added to the application.\nAzure AD\u202faddressed this vulnerability by preventing disclosure of any private key\u202fvalues added\u202fto the application.\nMicrosoft has identified services that could manifest this vulnerability, and steps that customers should take to be protected. Refer to the FAQ section for more information.\nFor more details on this issue, please refer to the MSRC Blog Entry.\n"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Elevation of Privilege",
              "lang": "en-US",
              "type": "Impact"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-05-29T14:48:06.584Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42306"
        }
      ],
      "title": "Azure Active Directory Information Disclosure Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2021-42306",
    "datePublished": "2021-11-24T01:05:13",
    "dateReserved": "2021-10-12T00:00:00",
    "dateUpdated": "2024-08-04T03:30:38.252Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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

CERTFR-2021-AVI-884

Solution

CVE-2021-42306 (GCVE-0-2021-42306)

Tags

Sightings

Nomenclature