CVE-2021-34527
Microsoft Windows Print Spooler Remote Code Execution Vulnerability
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
16Exploited in Wild
YesDecision
Descriptions
<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>
Una vulnerabilidad en la ejecución de código remota de Windows Print Spooler
Microsoft Windows Print Spooler contains an unspecified vulnerability due to the Windows Print Spooler service improperly performing privileged file operations. Successful exploitation allows an attacker to perform remote code execution with SYSTEM privileges. The vulnerability is also known under the moniker of PrintNightmare.
CVSS Scores
SSVC
- Decision:Act
Timeline
- 2021-06-09 CVE Reserved
- 2021-07-02 CVE Published
- 2021-07-02 First Exploit
- 2021-07-20 KEV Due Date
- 2021-11-03 Exploited in Wild
- 2024-08-04 CVE Updated
- 2024-11-19 EPSS Updated
CWE
- CWE-269: Improper Privilege Management
CAPEC
References (17)
URL | Tag | Source |
---|
URL | Date | SRC |
---|---|---|
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34527 | 2024-02-02 |
URL | Date | SRC |
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Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Microsoft Search vendor "Microsoft" | Windows 10 1507 Search vendor "Microsoft" for product "Windows 10 1507" | < 10.0.10240.18969 Search vendor "Microsoft" for product "Windows 10 1507" and version " < 10.0.10240.18969" | - |
Affected
| ||||||
Microsoft Search vendor "Microsoft" | Windows 10 1607 Search vendor "Microsoft" for product "Windows 10 1607" | < 10.0.14393.4470 Search vendor "Microsoft" for product "Windows 10 1607" and version " < 10.0.14393.4470" | - |
Affected
| ||||||
Microsoft Search vendor "Microsoft" | Windows 10 1809 Search vendor "Microsoft" for product "Windows 10 1809" | < 10.0.17763.2029 Search vendor "Microsoft" for product "Windows 10 1809" and version " < 10.0.17763.2029" | - |
Affected
| ||||||
Microsoft Search vendor "Microsoft" | Windows 10 20h2 Search vendor "Microsoft" for product "Windows 10 20h2" | < 10.0.19042.1083 Search vendor "Microsoft" for product "Windows 10 20h2" and version " < 10.0.19042.1083" | - |
Affected
| ||||||
Microsoft Search vendor "Microsoft" | Windows 10 21h2 Search vendor "Microsoft" for product "Windows 10 21h2" | < 10.0.19044.1415 Search vendor "Microsoft" for product "Windows 10 21h2" and version " < 10.0.19044.1415" | - |
Affected
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Microsoft Search vendor "Microsoft" | Windows 10 22h2 Search vendor "Microsoft" for product "Windows 10 22h2" | < 10.0.19045.2251 Search vendor "Microsoft" for product "Windows 10 22h2" and version " < 10.0.19045.2251" | - |
Affected
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Microsoft Search vendor "Microsoft" | Windows 11 21h2 Search vendor "Microsoft" for product "Windows 11 21h2" | < 10.0.22000.318 Search vendor "Microsoft" for product "Windows 11 21h2" and version " < 10.0.22000.318" | - |
Affected
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Microsoft Search vendor "Microsoft" | Windows 11 22h2 Search vendor "Microsoft" for product "Windows 11 22h2" | < 10.0.22621.674 Search vendor "Microsoft" for product "Windows 11 22h2" and version " < 10.0.22621.674" | - |
Affected
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Microsoft Search vendor "Microsoft" | Windows 7 Search vendor "Microsoft" for product "Windows 7" | - | sp1 |
Affected
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Microsoft Search vendor "Microsoft" | Windows 8.1 Search vendor "Microsoft" for product "Windows 8.1" | - | - |
Affected
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Microsoft Search vendor "Microsoft" | Windows Rt 8.1 Search vendor "Microsoft" for product "Windows Rt 8.1" | - | - |
Affected
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Microsoft Search vendor "Microsoft" | Windows Server 2008 Search vendor "Microsoft" for product "Windows Server 2008" | - | sp2 |
Affected
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Microsoft Search vendor "Microsoft" | Windows Server 2008 Search vendor "Microsoft" for product "Windows Server 2008" | r2 Search vendor "Microsoft" for product "Windows Server 2008" and version "r2" | sp1, x64 |
Affected
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Microsoft Search vendor "Microsoft" | Windows Server 2012 Search vendor "Microsoft" for product "Windows Server 2012" | - | - |
Affected
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Microsoft Search vendor "Microsoft" | Windows Server 2012 Search vendor "Microsoft" for product "Windows Server 2012" | r2 Search vendor "Microsoft" for product "Windows Server 2012" and version "r2" | - |
Affected
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Microsoft Search vendor "Microsoft" | Windows Server 2016 Search vendor "Microsoft" for product "Windows Server 2016" | < 10.0.14393.4470 Search vendor "Microsoft" for product "Windows Server 2016" and version " < 10.0.14393.4470" | - |
Affected
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Microsoft Search vendor "Microsoft" | Windows Server 2019 Search vendor "Microsoft" for product "Windows Server 2019" | < 10.0.17763.2029 Search vendor "Microsoft" for product "Windows Server 2019" and version " < 10.0.17763.2029" | - |
Affected
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Microsoft Search vendor "Microsoft" | Windows Server 2022 Search vendor "Microsoft" for product "Windows Server 2022" | < 10.0.20348.230 Search vendor "Microsoft" for product "Windows Server 2022" and version " < 10.0.20348.230" | - |
Affected
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Microsoft Search vendor "Microsoft" | Windows Server 20h2 Search vendor "Microsoft" for product "Windows Server 20h2" | < 10.0.19042.1083 Search vendor "Microsoft" for product "Windows Server 20h2" and version " < 10.0.19042.1083" | - |
Affected
|