certfr_avis - certfr-2021-avi-506

CERTFR-2021-AVI-506

Vulnerability from certfr_avis - Published: - Updated:

Une vulnérabilité a été découverte dans Microsoft Windows. Elle permet à un attaquant de provoquer une exécution de code arbitraire à distance et une élévation de privilèges.

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	Windows	Windows 10 Version 2004 for x64-based Systems
Microsoft	Windows	Windows Server 2012
Microsoft	Windows	Windows 10 Version 21H1 for ARM64-based Systems
Microsoft	Windows	Windows 8.1 for 32-bit systems
Microsoft	Windows	Windows Server 2019 (Server Core installation)
Microsoft	Windows	Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Microsoft	Windows	Windows Server, version 2004 (Server Core installation)
Microsoft	Windows	Windows Server 2019
Microsoft	Windows	Windows Server 2012 R2
Microsoft	Windows	Windows 7 for 32-bit Systems Service Pack 1
Microsoft	Windows	Windows 10 Version 1909 for 32-bit Systems
Microsoft	Windows	Windows 10 Version 20H2 for ARM64-based Systems
Microsoft	Windows	Windows 10 Version 21H1 for x64-based Systems
Microsoft	Windows	Windows Server 2016 (Server Core installation)
Microsoft	Windows	Windows Server 2008 R2 for x64-based Systems Service Pack 1
Microsoft	Windows	Windows 10 Version 20H2 for x64-based Systems
Microsoft	Windows	Windows 10 Version 2004 for 32-bit Systems
Microsoft	Windows	Windows Server 2008 for 32-bit Systems Service Pack 2
Microsoft	Windows	Windows RT 8.1
Microsoft	Windows	Windows 8.1 for x64-based systems
Microsoft	Windows	Windows 10 Version 1809 for x64-based Systems
Microsoft	Windows	Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Microsoft	Windows	Windows 10 Version 20H2 for 32-bit Systems
Microsoft	Windows	Windows 10 Version 21H1 for 32-bit Systems
Microsoft	Windows	Windows 10 Version 1809 for ARM64-based Systems
Microsoft	Windows	Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Microsoft	Windows	Windows 10 Version 1607 for 32-bit Systems
Microsoft	Windows	Windows Server 2008 for x64-based Systems Service Pack 2
Microsoft	Windows	Windows Server 2016
Microsoft	Windows	Windows 10 Version 1607 for x64-based Systems
Microsoft	Windows	Windows 10 Version 2004 for ARM64-based Systems
Microsoft	Windows	Windows 10 Version 1809 for 32-bit Systems
Microsoft	Windows	Windows Server, version 20H2 (Server Core Installation)
Microsoft	Windows	Windows 10 Version 1909 for ARM64-based Systems
Microsoft	Windows	Windows 10 for x64-based Systems
Microsoft	Windows	Windows 10 Version 1909 for x64-based Systems
Microsoft	Windows	Windows Server 2012 R2 (Server Core installation)
Microsoft	Windows	Windows 10 for 32-bit Systems
Microsoft	Windows	Windows 7 for x64-based Systems Service Pack 1

References

Title

Publication Time

Tags

Bulletin de sécurité Microsoft CVE-2021-34527 du 01 juillet 2021

None

vendor-advisory

Show details on source website

JSON

To clipboard

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  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Windows 10 Version 2004 for x64-based Systems",
      "product": {
        "name": "Windows",
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      "description": "Windows 10 Version 21H1 for ARM64-based Systems",
      "product": {
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        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
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    {
      "description": "Windows 8.1 for 32-bit systems",
      "product": {
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        "vendor": {
          "name": "Microsoft",
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      "product": {
        "name": "Windows",
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          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)",
      "product": {
        "name": "Windows",
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          "scada": false
        }
      }
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    {
      "description": "Windows Server, version 2004 (Server Core installation)",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server 2019",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server 2012 R2",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 7 for 32-bit Systems Service Pack 1",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 1909 for 32-bit Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 20H2 for ARM64-based Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 21H1 for x64-based Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server 2016 (Server Core installation)",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server 2008 R2 for x64-based Systems Service Pack 1",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 20H2 for x64-based Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 2004 for 32-bit Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server 2008 for 32-bit Systems Service Pack 2",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows RT 8.1",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 8.1 for x64-based systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 1809 for x64-based Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 20H2 for 32-bit Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 21H1 for 32-bit Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 1809 for ARM64-based Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 1607 for 32-bit Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server 2008 for x64-based Systems Service Pack 2",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server 2016",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 1607 for x64-based Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 2004 for ARM64-based Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 1809 for 32-bit Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server, version 20H2 (Server Core Installation)",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 1909 for ARM64-based Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 for x64-based Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 Version 1909 for x64-based Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows Server 2012 R2 (Server Core installation)",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 10 for 32-bit Systems",
      "product": {
        "name": "Windows",
        "vendor": {
          "name": "Microsoft",
          "scada": false
        }
      }
    },
    {
      "description": "Windows 7 for x64-based Systems Service Pack 1",
      "product": {
        "name": "Windows",
        "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-2021-34527",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-34527"
    }
  ],
  "links": [],
  "reference": "CERTFR-2021-AVI-506",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2021-07-07T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "Ex\u00e9cution de code arbitraire \u00e0 distance"
    },
    {
      "description": "\u00c9l\u00e9vation de privil\u00e8ges"
    }
  ],
  "summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Microsoft Windows. Elle permet \u00e0\nun attaquant de provoquer une ex\u00e9cution de code arbitraire \u00e0 distance et\nune \u00e9l\u00e9vation de privil\u00e8ges.\n",
  "title": "Vuln\u00e9rabilit\u00e9 dans Microsoft Windows",
  "vendor_advisories": [
    {
      "published_at": null,
      "title": "Bulletin de s\u00e9curit\u00e9 Microsoft CVE-2021-34527 du 01 juillet 2021",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527"
    }
  ]
}

CVE-2021-34527 (GCVE-0-2021-34527)

Vulnerability from cvelistv5 – Published: 2021-07-02 21:25 – Updated: 2025-11-04 19:12

Summary

A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. UPDATE July 7, 2021: The security update for Windows Server 2012, Windows Server 2016 and Windows 10, Version 1607 have been released. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability. In addition to installing the updates, in order to secure your system, you must confirm that the following registry settings are set to 0 (zero) or are not defined (Note: These registry keys do not exist by default, and therefore are already at the secure setting.), also that your Group Policy setting are correct (see FAQ): <ul> <li>HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Printers\PointAndPrint</li> <li>NoWarningNoElevationOnInstall = 0 (DWORD) or not defined (default setting)</li> <li>UpdatePromptSettings = 0 (DWORD) or not defined (default setting)</li> </ul> Having NoWarningNoElevationOnInstall set to 1 makes your system vulnerable by design. UPDATE July 6, 2021: Microsoft has completed the investigation and has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability. See also <a href="https://support.microsoft.com/topic/31b91c02-05bc-4ada-a7ea-183b129578a7">KB5005010: Restricting installation of new printer drivers after applying the July 6, 2021 updates</a>. Note that the security updates released on and after July 6, 2021 contain protections for CVE-2021-1675 and the additional remote code execution exploit in the Windows Print Spooler service known as “PrintNightmare”, documented in CVE-2021-34527.

Severity ?

8.8 (High)


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

CWE

Remote Code Execution

Assigner

microsoft

References

URL

Tags

	https://portal.msrc.microsoft.com/en-US/security-…	x_refsource_MISC
	http://packetstormsecurity.com/files/167261/Print…	x_refsource_MISC

Impacted products

Vendor

Product

Version

Microsoft

Windows 10 Version 1809

Affected: 10.0.0 , < 10.0.17763.2029 (custom)
 cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2029:*:*:*:*:*:x86:*
 cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2029:*:*:*:*:*:x64:*
 cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2029:*:*:*:*:*:arm64:*

Microsoft	Windows Server 2019	Affected: 10.0.0 , < 10.0.17763.2029 (custom) cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2029:::::::*
Microsoft	Windows Server 2019 (Server Core installation)	Affected: 10.0.0 , < 10.0.17763.2029 (custom) cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2029:::::::*
Microsoft	Windows Server 2022	Affected: 10.0.0 , < 10.0.20348.230 (custom) cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.230:::::::*
Microsoft	Windows 10 Version 20H2	Affected: 10.0.0 , < 10.0.19042.1083 (custom) cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1083::::::x86: cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1083::::::arm64:
Microsoft	Windows Server version 20H2	Affected: 10.0.0 , < 10.0.19042.1083 (custom) cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1083:::::::*
Microsoft	Windows 11 version 21H2	Affected: 10.0.0 , < 10.0.22000.318 (custom) cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.318::::::x64: cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.318::::::arm64:
Microsoft	Windows 10 Version 21H2	Affected: 10.0.0 , < 10.0.19044.1415 (custom) cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415::::::x86: cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415::::::arm64: cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415::::::x64:
Microsoft	Windows 11 version 22H2	Affected: 10.0.0 , < 10.0.22621.674 (custom) cpe:2.3:o:microsoft:windows_11_22H2:10.0.22621.674::::::arm64: cpe:2.3:o:microsoft:windows_11_22H2:10.0.22621.674::::::x64:
Microsoft	Windows 10 Version 22H2	Affected: 10.0.0 , < 10.0.19045.2251 (custom) cpe:2.3:o:microsoft:windows_10_22H2:10.0.19045.2251::::::x64: cpe:2.3:o:microsoft:windows_10_22H2:10.0.19045.2251::::::arm64: cpe:2.3:o:microsoft:windows_10_22H2:10.0.19045.2251::::::x86:
Microsoft	Windows 10 Version 1507	Affected: 10.0.0 , < 10.0.10240.18969 (custom) cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.18969::::::x86: cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.18969::::::x64:
Microsoft	Windows 10 Version 1607	Affected: 10.0.0 , < 10.0.14393.4470 (custom) cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4470::::::x86: cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4470::::::x64:
Microsoft	Windows Server 2016	Affected: 10.0.0 , < 10.0.14393.4470 (custom) cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4470:::::::*
Microsoft	Windows Server 2016 (Server Core installation)	Affected: 10.0.0 , < 10.0.14393.4470 (custom) cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4470:::::::*
Microsoft	Windows 8.1	Affected: 6.3.0 , < 6.3.9600.20046 (custom) cpe:2.3:o:microsoft:windows_rt_8.1:6.3.9600.20046:::::::*
Microsoft	Windows Server 2008 Service Pack 2	Affected: 6.0.0 , < 6.0.6003.21138 (custom) cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21138::::::x64:
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	Affected: 6.0.0 , < 6.0.6003.21138 (custom) cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21138::::::x64: cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21138::::::x86:
Microsoft	Windows Server 2008 Service Pack 2	Affected: 6.0.0 , < 6.0.6003.21138 (custom) cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21138::::::x86:
Microsoft	Windows Server 2008 R2 Service Pack 1	Affected: 6.1.0 , < 6.1.7601.25633 (custom) cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25633::::::x64:
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	Affected: 6.0.0 , < 6.1.7601.25633 (custom) cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25633::::::x64:
Microsoft	Windows Server 2012	Affected: 6.2.0 , < 6.2.9200.23383 (custom) cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23383::::::x64:
Microsoft	Windows Server 2012 (Server Core installation)	Affected: 6.2.0 , < 6.2.9200.23383 (custom) cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23383::::::x64:
Microsoft	Windows Server 2012 R2	Affected: 6.3.0 , < 6.3.9600.20046 (custom) cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20046::::::x64:
Microsoft	Windows Server 2012 R2 (Server Core installation)	Affected: 6.3.0 , < 6.3.9600.20046 (custom) cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20046::::::x64:

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2021-34527",
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                  },
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                "timestamp": "2024-01-24T16:04:14.042095Z",
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        "references": [
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            "cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2029:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2029:*:*:*:*:*:x64:*",
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          "platforms": [
            "32-bit Systems",
            "x64-based Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.2029",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2029:*:*:*:*:*:*:*"
          ],
          "platforms": [
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          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.2029",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
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          "platforms": [
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          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.2029",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.230:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.230",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1083:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1083:*:*:*:*:*:arm64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 10 Version 20H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19042.1083",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1083:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server version 20H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19042.1083",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.318:*:*:*:*:*:x64:*",
            "cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.318:*:*:*:*:*:arm64:*"
          ],
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22000.318",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:arm64:*",
            "cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.1415",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_11_22H2:10.0.22621.674:*:*:*:*:*:arm64:*",
            "cpe:2.3:o:microsoft:windows_11_22H2:10.0.22621.674:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22621.674",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_22H2:10.0.19045.2251:*:*:*:*:*:x64:*",
            "cpe:2.3:o:microsoft:windows_10_22H2:10.0.19045.2251:*:*:*:*:*:arm64:*",
            "cpe:2.3:o:microsoft:windows_10_22H2:10.0.19045.2251:*:*:*:*:*:x86:*"
          ],
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.2251",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.18969:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.18969:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1507",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.10240.18969",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4470:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4470:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.4470",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4470:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.4470",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4470:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.4470",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_rt_8.1:6.3.9600.20046:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 8.1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.20046",
              "status": "affected",
              "version": "6.3.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21138:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "32-bit Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.21138",
              "status": "affected",
              "version": "6.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21138:*:*:*:*:*:x64:*",
            "cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21138:*:*:*:*:*:x86:*"
          ],
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.21138",
              "status": "affected",
              "version": "6.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21138:*:*:*:*:*:x86:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008  Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.21138",
              "status": "affected",
              "version": "6.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25633:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.25633",
              "status": "affected",
              "version": "6.1.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25633:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.25633",
              "status": "affected",
              "version": "6.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23383:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.23383",
              "status": "affected",
              "version": "6.2.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23383:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.23383",
              "status": "affected",
              "version": "6.2.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20046:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.20046",
              "status": "affected",
              "version": "6.3.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20046:*:*:*:*:*:x64:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.20046",
              "status": "affected",
              "version": "6.3.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "datePublic": "2021-07-01T07:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "\u003cp\u003eA remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.\u003c/p\u003e\n\u003cp\u003eUPDATE July 7, 2021: The security update for Windows Server 2012, Windows Server 2016 and Windows 10, Version 1607 have been released. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability.\u003c/p\u003e\n\u003cp\u003eIn addition to installing the updates, in order to secure your system, you must confirm that the following registry settings are set to 0 (zero) or are not defined (\u003cstrong\u003eNote\u003c/strong\u003e: These registry keys do not exist by default, and therefore are already at the secure setting.), also that your Group Policy setting are correct (see FAQ):\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eHKEY_LOCAL_MACHINE\\SOFTWARE\\Policies\\Microsoft\\Windows NT\\Printers\\PointAndPrint\u003c/li\u003e\n\u003cli\u003eNoWarningNoElevationOnInstall = 0 (DWORD) or not defined (default setting)\u003c/li\u003e\n\u003cli\u003eUpdatePromptSettings = 0 (DWORD) or not defined (default setting)\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHaving NoWarningNoElevationOnInstall set to 1 makes your system vulnerable by design.\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eUPDATE July 6, 2021: Microsoft has completed the investigation and has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability. See also \u003ca href=\"https://support.microsoft.com/topic/31b91c02-05bc-4ada-a7ea-183b129578a7\"\u003eKB5005010: Restricting installation of new printer drivers after applying the July 6, 2021 updates\u003c/a\u003e.\u003c/p\u003e\n\u003cp\u003eNote that the security updates released on and after July 6, 2021 contain protections for CVE-2021-1675 and the additional remote code execution exploit in the Windows Print Spooler service known as \u201cPrintNightmare\u201d, documented in CVE-2021-34527.\u003c/p\u003e\n"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Remote Code Execution",
              "lang": "en-US",
              "type": "Impact"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-12-28T22:37:17.773Z",
        "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-2021-34527"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-Injection.html"
        }
      ],
      "title": "Windows Print Spooler Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2021-34527",
    "datePublished": "2021-07-02T21:25:11.000Z",
    "dateReserved": "2021-06-09T00:00:00.000Z",
    "dateUpdated": "2025-11-04T19:12:33.128Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-506

Solution

CVE-2021-34527 (GCVE-0-2021-34527)

Tags

Sightings

Nomenclature