CVE-2021-34527— Microsoft Windows Print Spooler Components 安全漏洞
一分钟漏洞结论
影响对象
Microsoft Windows 10 Version 1507
利用判断
已确认在野利用，应立即处置
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Microsoft Windows Print Spooler Components是美国微软（Microsoft）公司的一个打印后台处理程序组件。 Microsoft Windows Print Spooler Components 存在安全漏洞，攻击者可以通过该漏洞绕过PfcAddPrinterDriver的安全验证，并在打印服务器中安装恶意的驱动程序。以下产品和版本受到影响:Windows 10 Version 1809 for 32-bit Systems,Windows 10 Version 1
公开利用映射 1
Metasploit · 1
cve_2021_1675_printnightmare.rb#CVE-2021-34527 [exploit]
已观察到在野利用
cisa_kev · confirmed
影响版本矩阵 24
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Microsoft | Windows 10 Version 1507 | 10.0.10240.0< 10.0.10240.18969 |
affected |
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0< 10.0.14393.4470 |
affected |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0< 10.0.17763.2029 |
affected |
10.0.0< 10.0.17763.2029 |
affected | ||
| Microsoft | Windows 10 Version 20H2 | 10.0.0< 10.0.19042.1083 |
affected |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0< 10.0.19044.1415 |
affected |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0< 10.0.19045.2251 |
affected |
| Microsoft | Windows 11 version 21H2 | 10.0.22000.0< 10.0.22000.318 |
affected |
| Microsoft | Windows 11 version 22H2 | 10.0.22621.0< 10.0.22621.674 |
affected |
| Microsoft | Windows 8.1 | 6.3.0< 6.3.9600.20046 |
affected |
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.7601.0< 6.1.7601.25633 |
affected |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.1.7601.0< 6.1.7601.25633 |
affected |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.6003.0< 6.0.6003.21138 |
affected |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.6003.0< 6.0.6003.21138 |
affected |
| Microsoft | Windows Server 2012 | 6.2.9200.0< 6.2.9200.23383 |
affected |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0< 6.2.9200.23383 |
affected |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0< 6.3.9600.20046 |
affected |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0< 6.3.9600.20046 |
affected |
| Microsoft | Windows Server 2016 | 10.0.14393.0< 10.0.14393.4470 |
affected |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0< 10.0.14393.4470 |
affected |
| Microsoft | Windows Server 2019 | 10.0.17763.0< 10.0.17763.2029 |
affected |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0< 10.0.17763.2029 |
affected |
| Microsoft | Windows Server 2022 | 10.0.20348.0< 10.0.20348.230 |
affected |
| Microsoft | Windows Server version 20H2 | 10.0.0< 10.0.19042.1083 |
affected |
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一、 漏洞 CVE-2021-34527 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
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Vulnerability Title
Windows Print Spooler Remote Code Execution Vulnerability
来源: CVE Program / CVE List V5
Vulnerability Description
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):
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Printers\PointAndPrint
NoWarningNoElevationOnInstall = 0 (DWORD) or not defined (default setting)
UpdatePromptSettings = 0 (DWORD) or not defined (default setting)
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 KB5005010: Restricting installation of new printer drivers after applying the July 6, 2021 updates.
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.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows Print Spooler Components 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Microsoft Windows Print Spooler Components是美国微软（Microsoft）公司的一个打印后台处理程序组件。 Microsoft Windows Print Spooler Components 存在安全漏洞，攻击者可以通过该漏洞绕过PfcAddPrinterDriver的安全验证，并在打印服务器中安装恶意的驱动程序。以下产品和版本受到影响:Windows 10 Version 1809 for 32-bit Systems,Windows 10 Version 1
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2021-34527 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|---|---|---|
| 1 | Small Powershell Script to detect Running Printer Spoolers on Domain Controller | https://github.com/DenizSe/CVE-2021-34527 | POC详情 |
| 2 | Kritische Sicherheitslücke PrintNightmare CVE-2021-34527 | https://github.com/glshnu/PrintNightmare | POC详情 |
| 3 | None | https://github.com/JohnHammond/CVE-2021-34527 | POC详情 |
| 4 | PrintNightmare - Windows Print Spooler RCE/LPE Vulnerability (CVE-2021-34527, CVE-2021-1675) proof of concept exploits | https://github.com/nemo-wq/PrintNightmare-CVE-2021-34527 | POC详情 |
| 5 | Cve-2021-1675 or cve-2021-34527? Detailed analysis and exploitation of windows print spooler 0day vulnerability！！！ | https://github.com/CnOxx1/CVE-2021-34527-1675 | POC详情 |
| 6 | Workaround for Windows Print Spooler Remote Code Execution Vulnerability(CVE-2021-34527). See: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527 | https://github.com/rdboboia/disable-RegisterSpoolerRemoteRpcEndPoint | POC详情 |
| 7 | This simple PowerShell script is in response to the "PrintNightmare" vulnerability. This was designed to give a end user the ability to stop and disable the "Print Spooler" service on their computer while awaiting a fix from Microsoft. | https://github.com/geekbrett/CVE-2021-34527-PrintNightmare-Workaround | POC详情 |
| 8 | A PrintNightmare (CVE-2021-34527) Python Scanner. Scan entire subnets for hosts vulnerable to the PrintNightmare RCE | https://github.com/byt3bl33d3r/ItWasAllADream | POC详情 |
| 9 | Simple batch script to disable the Microsoft Print Spooler service from system | https://github.com/vinaysudheer/Disable-Spooler-Service-PrintNightmare-CVE-2021-34527 | POC详情 |
| 10 | How to fix the PrintNightmare vulnerability | https://github.com/powershellpr0mpt/PrintNightmare-CVE-2021-34527 | POC详情 |
| 11 | Mitigation for CVE-2021-34527 RCE by setting WRITE ACLs | https://github.com/WidespreadPandemic/CVE-2021-34527_ACL_mitigation | POC详情 |
| 12 | CVE-2021-34527 implementation | https://github.com/glorisonlai/printnightmare | POC详情 |
| 13 | None | https://github.com/dywhoami/CVE-2021-34527-Scanner-Based-On-cube0x0-POC | POC详情 |
| 14 | Fix for PrintNightmare CVE-2021-34527 | https://github.com/Eutectico/Printnightmare | POC详情 |
| 15 | A collection of scripts to help set the appropriate registry keys for CVE-2021-34527 | https://github.com/syntaxbearror/PowerShell-PrintNightmare | POC详情 |
| 16 | A patch for PrintNightmare vulnerability that occurs to print spooler service for Windows machines [CVE-2021-34527] | https://github.com/0xirison/PrintNightmare-Patcher | POC详情 |
| 17 | To fight against Windows security breach PrintNightmare! (CVE-2021-34527, CVE-2021-1675) | https://github.com/Tomparte/PrintNightmare | POC详情 |
| 18 | None | https://github.com/Amaranese/CVE-2021-34527 | POC详情 |
| 19 | None | https://github.com/cyb3rpeace/CVE-2021-34527 | POC详情 |
| 20 | PrintNightmare (CVE-2021-34527) PoC Exploit | https://github.com/m8sec/CVE-2021-34527 | POC详情 |
| 21 | CVE-2021-34527 AddPrinterDriverEx() Privilege Escalation | https://github.com/hackerhouse-opensource/cve-2021-34527 | POC详情 |
| 22 | # Fix-CVE-2021-34527 Fix for the security Script Changes ACL in the directory Stop Service PrintSpooler Spooler Changes StartupType to Disabled Add every server in the serverlist.csv and run script. | https://github.com/fardinbarashi/PsFix-CVE-2021-34527 | POC详情 |
| 23 | CVE-2021-34527 PrintNightmare PoC | https://github.com/d0rb/CVE-2021-34527 | POC详情 |
| 24 | detect bruteforce using for cve-2021-34527 | https://github.com/TieuLong21Prosper/detect_bruteforce | POC详情 |
| 25 | Kritische Sicherheitslücke PrintNightmare CVE-2021-34527 | https://github.com/thomas-lauer/PrintNightmare | POC详情 |
| 26 | None | https://github.com/Hirusha-N/CVE-2021-34527-CVE-2023-38831-and-CVE-2023-32784 | POC详情 |
| 27 | CVE-2021-34527 is a critical remote code execution and local privilege escalation vulnerability dubbed "PrintNightmare." | https://github.com/AUSK1LL9/CVE-2021-34527 | POC详情 |
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CVE-2021-34527 厂商安全公告 (1)
CVE-2021-34527 公开利用代码 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2021-34527
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