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CVE-2021-36934— Microsoft Windows 访问控制错误漏洞

一分钟漏洞结论

影响对象
Microsoft Windows 10 Version 1809
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是美国微软（Microsoft）公司的一种桌面操作系统。 Microsoft Windows 存在访问控制错误漏洞，该漏洞源于系统对多个系统文件的访问控制列表过于宽松，因此存在特权提升漏洞。成功利用此漏洞的攻击者可以使用SYSTEM权限运行任意代码。

CVSS 7.8 · High KEV EPSS 67.25% · P99

公开利用映射 1

Metasploit · 1 windows_sam_hivenightmare.rb [post]

影响版本矩阵 6

厂商产品 版本范围状态
Microsoft Windows 10 Version 1809 10.0.17763.0< 10.0.17763.2114 affected
10.0.0< 10.0.17763.2114 affected
Microsoft Windows 10 Version 1909 10.0.0< 10.0.18363.1734 affected
Microsoft Windows 10 Version 2004 10.0.0< 10.0.19041.1165 affected
Microsoft Windows 10 Version 20H2 10.0.0< 10.0.19042.1165 affected
Microsoft Windows 10 Version 21H1 10.0.0< 10.0.19043.1165 affected
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一、 漏洞 CVE-2021-36934 基础信息

漏洞信息
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Vulnerability Title
Windows Elevation of Privilege Vulnerability
来源: CVE Program / CVE List V5
Vulnerability Description
An elevation of privilege vulnerability exists because of overly permissive Access Control Lists (ACLs) on multiple system files, including the Security Accounts Manager (SAM) database. 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. An attacker must have the ability to execute code on a victim system to exploit this vulnerability. After installing this security update, you must manually delete all shadow copies of system files, including the SAM database, to fully mitigate this vulnerabilty. Simply installing this security update will not fully mitigate this vulnerability. See KB5005357- Delete Volume Shadow Copies.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/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 访问控制错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Microsoft Windows是美国微软（Microsoft）公司的一种桌面操作系统。 Microsoft Windows 存在访问控制错误漏洞，该漏洞源于系统对多个系统文件的访问控制列表过于宽松，因此存在特权提升漏洞。成功利用此漏洞的攻击者可以使用SYSTEM权限运行任意代码。
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

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受影响产品

厂商 产品 影响版本 CPE 订阅
Microsoft Windows 10 Version 1809 10.0.17763.0 ~ 10.0.17763.2114 -
Microsoft Windows 10 Version 1809 10.0.0 ~ 10.0.17763.2114 -
Microsoft Windows 10 Version 1909 10.0.0 ~ 10.0.18363.1734 -
Microsoft Windows 10 Version 2004 10.0.0 ~ 10.0.19041.1165 -
Microsoft Windows 10 Version 20H2 10.0.0 ~ 10.0.19042.1165 -
Microsoft Windows 10 Version 21H1 10.0.0 ~ 10.0.19043.1165 -

二、漏洞 CVE-2021-36934 的公开POC

# POC 描述 源链接 神龙链接
1 Pure Nim implementation for exploiting CVE-2021-36934, the SeriousSAM local privilege escalation https://github.com/HuskyHacks/ShadowSteal POC详情
2 Fix for the CVE-2021-36934 https://github.com/JoranSlingerland/CVE-2021-36934 POC详情
3 Detection and Mitigation script for CVE-2021-36934 (HiveNightmare aka. SeriousSam) https://github.com/n3tsurge/CVE-2021-36934 POC详情
4 Small and dirty PoC for CVE-2021-36934 https://github.com/Wh04m1001/VSSCopy POC详情
5 PoC for CVE-2021-36934, which enables a standard user to be able to retrieve the SAM, Security, and Software Registry hives in Windows 10 version 1809 or newer https://github.com/WiredPulse/Invoke-HiveNightmare POC详情
6 HiveNightmare a.k.a. SeriousSam Local Privilege Escalation in Windows – CVE-2021-36934 https://github.com/romarroca/SeriousSam POC详情
7 A capability to identify and remediate CVE-2021-36934 (HiveNightmare) https://github.com/WiredPulse/Invoke-HiveDreams POC详情
8 CVE-2021-36934 PowerShell Fix https://github.com/tda90/CVE-2021-36934 POC详情
9 Windows Elevation of Privilege Vulnerability (SeriousSAM) https://github.com/VertigoRay/CVE-2021-36934 POC详情
10 CVE-2021-36934 PowerShell scripts https://github.com/bytesizedalex/CVE-2021-36934 POC详情
11 C# PoC for CVE-2021-36934/HiveNightmare/SeriousSAM https://github.com/Preventions/CVE-2021-36934 POC详情
12 PoC for CVE-2021-36934 Aka HiveNightmare/SeriousSAM written in python3 https://github.com/Sp00p64/PyNightmare POC详情
13 This PowerShell script will take the mitigation measures for CVE-2021-36934 described by Microsoft and the US CERT team. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36934 https://kb.cert.org/vuls/id/506989 USE AT YOUR OWN RISK -- BACKUPS MAY BREAK. https://github.com/jmaddington/Serious-Sam---CVE-2021-36934-Mitigation-for-Datto-RMM POC详情
14 None https://github.com/0x0D1n/CVE-2021-36934 POC详情
15 HiveNightmare aka SeriousSAM https://github.com/exploitblizzard/CVE-2021-36934 POC详情
16 CVE-2021-36934 HiveNightmare vulnerability checker and workaround https://github.com/irissentinel/CVE-2021-36934 POC详情
17 SeriousSAM Auto Exploiter https://github.com/websecnl/CVE-2021-36934 POC详情
18 POC experiments with Volume Shadow copy Service (VSS) https://github.com/grishinpv/poc_CVE-2021-36934 POC详情
19 Windows Elevation of Privilege Vulnerability CVE-2021-36934 https://github.com/shaktavist/SeriousSam POC详情
20 None https://github.com/OlivierLaflamme/CVE-2021-36934-export-shadow-volume-POC POC详情
21 Exploit for CVE-2021-36934 https://github.com/chron1k/oxide_hive POC详情
22 PoC for CVE-2021-36934 Aka HiveNightmare/SeriousSAM written in python3 https://github.com/Sp00kySkelet0n/PyNightmare POC详情
23 PoC malware that uses exploit CVE-2021-36934 (improper ACLs on shadow copies) using a fileless red team method on Windows 10/11 with LOLBins, extracting SYSTEM and SAM hives for local NTLM hashes. https://github.com/P1rat3R00t/Why-so-Serious-SAM POC详情
24 Educational lab demonstrating CVE-2021-36934 (HiveNightmare) - Windows LPE via shadow copy ACL misconfiguration. https://github.com/d4yon/CVE-2021-36934-HiveNightmare-Lab POC详情
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三、漏洞 CVE-2021-36934 的情报信息

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CVE-2021-36934 厂商安全公告 (2)

CVE-2021-36934 公开利用代码 (1)

IV. Related Vulnerabilities

Same product: Windows 10 Version 1809
Same vendor: Microsoft

V. Comments for CVE-2021-36934

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