fkie_cve-2021-34527
Vulnerability from fkie_nvd
Published
2021-07-02 22:15
Modified
2024-11-21 06:10
Severity ?
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
<p>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.</p> <p>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.</p> <p>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 (<strong>Note</strong>: 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):</p> <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> <p><strong>Having NoWarningNoElevationOnInstall set to 1 makes your system vulnerable by design.</strong></p> <p>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>.</p> <p>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.</p>
References
secure@microsoft.comhttp://packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-Injection.htmlExploit, Third Party Advisory, VDB Entry
secure@microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34527Mitigation, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-Injection.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34527Mitigation, Patch, Vendor Advisory
Impacted products
Vendor Product Version
microsoft windows_10_1507 *
microsoft windows_10_1607 *
microsoft windows_10_1809 *
microsoft windows_10_20h2 *
microsoft windows_10_21h2 *
microsoft windows_10_22h2 *
microsoft windows_11_21h2 *
microsoft windows_11_22h2 *
microsoft windows_7 -
microsoft windows_8.1 -
microsoft windows_rt_8.1 -
microsoft windows_server_2008 -
microsoft windows_server_2008 r2
microsoft windows_server_2012 -
microsoft windows_server_2012 r2
microsoft windows_server_2016 *
microsoft windows_server_2019 *
microsoft windows_server_2022 *
microsoft windows_server_20h2 *


To clipboard 

{
  "cisaActionDue": "2021-07-20",
  "cisaExploitAdd": "2021-11-03",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Microsoft Windows Print Spooler Remote Code Execution Vulnerability",
  "configurations": [
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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"
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la ejecuci\u00f3n de c\u00f3digo remota de Windows Print Spooler"
    }
  ],
  "id": "CVE-2021-34527",
  "lastModified": "2024-11-21T06:10:36.397",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 9.0,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
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      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "secure@microsoft.com",
        "type": "Secondary"
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      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Secondary"
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  },
  "published": "2021-07-02T22:15:08.757",
  "references": [
    {
      "source": "secure@microsoft.com",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-Injection.html"
    },
    {
      "source": "secure@microsoft.com",
      "tags": [
        "Mitigation",
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34527"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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        "Third Party Advisory",
        "VDB Entry"
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      "url": "http://packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-Injection.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    }
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  "sourceIdentifier": "secure@microsoft.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-269"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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