Vulnerability-Lookup

BDU:2021-03913 (CVE-2021-36934)

Vulnerability from fstec – Published: 2021-08-04 – Updated: 2024-09-24 – View on bdu.fstec.ru Exploit exists Yes Fixed

Title

Уязвимость операционных систем Windows, связанная с недостатками разграничения доступа, позволяющая нарушителю повысить свои привилегии

Summary

Уязвимость операционных систем Windows связана с недостатками разграничения доступа к каталогу %windir%\system32\config. Эксплуатация уязвимости может позволить нарушителю повысить свои привилегии

Severity

7.2 (High) CVSS 2.0


                      
                        AV:L/AC:L/Au:N/C:C/I:C/A:C

9.3 (Critical) CVSS 3.0


                      
                        CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Authorization bypass

Incidents

Yes

Remediation

Software update

CWE

CWE-264 - Разрешения, привилегии и средства управления доступом

Aliases

CVE-2021-36934

References

5 references

URL
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36934
https://kb.cert.org/vuls/id/506989
https://nvd.nist.gov/vuln/detail/CVE-2021-36934
https://www.rapid7.com/blog/post/2021/07/21/microsoft-sam-file-readability-cve-…
https://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv

Impacted products

8 products from 1 vendor

Vendors

Microsoft Corp

Products

Windows 10 1809, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 1909, Windows 10 2004, Windows Server 2004 (Server Core Installation), Windows 10 20H2, Windows 10 21H1

Versions

- (Windows 10 1809), - (Windows Server 2019), - (Windows Server 2019 (Server Core installation)), - (Windows 10 1909), - (Windows 10 2004), - (Windows Server 2004 (Server Core Installation)), - (Windows 10 20H2), - (Windows 10 21H1)

Product types

Operating system

Platforms

Microsoft Corp Windows 10 1809 - 64-bit, Microsoft Corp Windows 10 1809 - 32-bit, Microsoft Corp Windows Server 2019 -, Microsoft Corp Windows Server 2019 (Server Core installation) -, Microsoft Corp Windows 10 1809 - ARM64, Microsoft Corp Windows 10 1909 - 32-bit, Microsoft Corp Windows 10 1909 - 64-bit, Microsoft Corp Windows 10 1909 - ARM64, Microsoft Corp Windows 10 2004 - 32-bit, Microsoft Corp Windows 10 2004 - 64-bit, Microsoft Corp Windows 10 2004 - ARM64, Microsoft Corp Windows Server 2004 (Server Core Installation) -, Microsoft Corp Windows 10 20H2 - ARM64, Microsoft Corp Windows 10 20H2 - 32-bit, Microsoft Corp Windows 10 20H2 - 64-bit, Microsoft Corp Windows 10 21H1 - 32-bit, Microsoft Corp Windows 10 21H1 - 64-bit, Microsoft Corp Windows 10 21H1 - ARM64

Mitigations

Использование рекомендаций: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36934 Ограничить доступ к содержимому% windir% \ system32 \ config Командная строка (Запуск от имени администратора): icacls %windir%\system32\config\*.* /inheritance:e Windows PowerShell (Запуск от имени администратора): icacls $env:windir\system32\config\*.* /inheritance:e Удаление теневых копий службы теневого копирования томов (VSS) Удалите все точки восстановления системы и теневые тома, которые существовали до ограничения доступа к% windir% \ system32 \ config. Создать новую точку восстановления системы (при желании). Влияние обходного пути Удаление теневых копий может повлиять на операции восстановления, в том числе на возможность восстановления данных с помощью сторонних приложений резервного копирования. Дополнительные сведения об удалении теневых копий см. В статье KB5005357 - Удаление теневых копий тома . Примечание. Вы должны ограничить доступ и удалить теневые копии, чтобы предотвратить использование этой уязвимости. Внимание! Восстановление вашей системы из резервной копии может также восстановить чрезмерно разрешающие списки контроля доступа и, следовательно, вернуть вашу систему в уязвимое состояние. После восстановления из резервной копии необходимо проверить правильность списков ACL, чтобы убедиться, что операция восстановления не привела к повторному появлению этой уязвимости.

Credits

Уязвимость получила название SeriousSAM или HiveNightmare

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
  "CVSS 3.0": "AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Microsoft Corp",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "- (Windows 10 1809), - (Windows Server 2019), - (Windows Server 2019 (Server Core installation)), - (Windows 10 1909), - (Windows 10 2004), - (Windows Server 2004 (Server Core Installation)), - (Windows 10 20H2), - (Windows 10 21H1)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\nhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36934\n\n\u041e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u043c\u0443% windir% \\ system32 \\ config\n\u041a\u043e\u043c\u0430\u043d\u0434\u043d\u0430\u044f \u0441\u0442\u0440\u043e\u043a\u0430 (\u0417\u0430\u043f\u0443\u0441\u043a \u043e\u0442 \u0438\u043c\u0435\u043d\u0438 \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430): icacls %windir%\\system32\\config\\*.* /inheritance:e\nWindows PowerShell (\u0417\u0430\u043f\u0443\u0441\u043a \u043e\u0442 \u0438\u043c\u0435\u043d\u0438 \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430): icacls $env:windir\\system32\\config\\*.* /inheritance:e\n\u0423\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u0442\u0435\u043d\u0435\u0432\u044b\u0445 \u043a\u043e\u043f\u0438\u0439 \u0441\u043b\u0443\u0436\u0431\u044b \u0442\u0435\u043d\u0435\u0432\u043e\u0433\u043e \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0442\u043e\u043c\u043e\u0432 (VSS)\n\u0423\u0434\u0430\u043b\u0438\u0442\u0435 \u0432\u0441\u0435 \u0442\u043e\u0447\u043a\u0438 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0438 \u0442\u0435\u043d\u0435\u0432\u044b\u0435 \u0442\u043e\u043c\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043e\u0432\u0430\u043b\u0438 \u0434\u043e \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a% windir% \\ system32 \\ config.\n\u0421\u043e\u0437\u0434\u0430\u0442\u044c \u043d\u043e\u0432\u0443\u044e \u0442\u043e\u0447\u043a\u0443 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u044b (\u043f\u0440\u0438 \u0436\u0435\u043b\u0430\u043d\u0438\u0438).\n\u0412\u043b\u0438\u044f\u043d\u0438\u0435 \u043e\u0431\u0445\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0443\u0442\u0438 \u0423\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u0442\u0435\u043d\u0435\u0432\u044b\u0445 \u043a\u043e\u043f\u0438\u0439 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0432\u043b\u0438\u044f\u0442\u044c \u043d\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f, \u0432 \u0442\u043e\u043c \u0447\u0438\u0441\u043b\u0435 \u043d\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0440\u0435\u0437\u0435\u0440\u0432\u043d\u043e\u0433\u043e \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f. \u0414\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e\u0431 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u0438 \u0442\u0435\u043d\u0435\u0432\u044b\u0445 \u043a\u043e\u043f\u0438\u0439 \u0441\u043c. \u0412 \u0441\u0442\u0430\u0442\u044c\u0435 KB5005357 - \u0423\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u0442\u0435\u043d\u0435\u0432\u044b\u0445 \u043a\u043e\u043f\u0438\u0439 \u0442\u043e\u043c\u0430 .\n\u041f\u0440\u0438\u043c\u0435\u0447\u0430\u043d\u0438\u0435. \u0412\u044b \u0434\u043e\u043b\u0436\u043d\u044b \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u0438 \u0443\u0434\u0430\u043b\u0438\u0442\u044c \u0442\u0435\u043d\u0435\u0432\u044b\u0435 \u043a\u043e\u043f\u0438\u0438, \u0447\u0442\u043e\u0431\u044b \u043f\u0440\u0435\u0434\u043e\u0442\u0432\u0440\u0430\u0442\u0438\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u044d\u0442\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438.\n\u0412\u043d\u0438\u043c\u0430\u043d\u0438\u0435! \u0412\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u0432\u0430\u0448\u0435\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0438\u0437 \u0440\u0435\u0437\u0435\u0440\u0432\u043d\u043e\u0439 \u043a\u043e\u043f\u0438\u0438 \u043c\u043e\u0436\u0435\u0442 \u0442\u0430\u043a\u0436\u0435 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c \u0447\u0440\u0435\u0437\u043c\u0435\u0440\u043d\u043e \u0440\u0430\u0437\u0440\u0435\u0448\u0430\u044e\u0449\u0438\u0435 \u0441\u043f\u0438\u0441\u043a\u0438 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u0438, \u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e, \u0432\u0435\u0440\u043d\u0443\u0442\u044c \u0432\u0430\u0448\u0443 \u0441\u0438\u0441\u0442\u0435\u043c\u0443 \u0432 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0435 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435. \u041f\u043e\u0441\u043b\u0435 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0438\u0437 \u0440\u0435\u0437\u0435\u0440\u0432\u043d\u043e\u0439 \u043a\u043e\u043f\u0438\u0438 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u043f\u0440\u043e\u0432\u0435\u0440\u0438\u0442\u044c \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0441\u043f\u0438\u0441\u043a\u043e\u0432 ACL, \u0447\u0442\u043e\u0431\u044b \u0443\u0431\u0435\u0434\u0438\u0442\u044c\u0441\u044f, \u0447\u0442\u043e \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u043d\u0435 \u043f\u0440\u0438\u0432\u0435\u043b\u0430 \u043a \u043f\u043e\u0432\u0442\u043e\u0440\u043d\u043e\u043c\u0443 \u043f\u043e\u044f\u0432\u043b\u0435\u043d\u0438\u044e \u044d\u0442\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438.",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "20.07.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "24.09.2024",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "04.08.2021",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2021-03913",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2021-36934",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Windows 10 1809, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 1909, Windows 10 2004, Windows Server 2004 (Server Core Installation), Windows 10 20H2, Windows 10 21H1",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Microsoft Corp Windows 10 1809 - 64-bit, Microsoft Corp Windows 10 1809 - 32-bit, Microsoft Corp Windows Server 2019 - , Microsoft Corp Windows Server 2019 (Server Core installation) - , Microsoft Corp Windows 10 1809 - ARM64, Microsoft Corp Windows 10 1909 - 32-bit, Microsoft Corp Windows 10 1909 - 64-bit, Microsoft Corp Windows 10 1909 - ARM64, Microsoft Corp Windows 10 2004 - 32-bit, Microsoft Corp Windows 10 2004 - 64-bit, Microsoft Corp Windows 10 2004 - ARM64, Microsoft Corp Windows Server 2004 (Server Core Installation) - , Microsoft Corp Windows 10 20H2 - ARM64, Microsoft Corp Windows 10 20H2 - 32-bit, Microsoft Corp Windows 10 20H2 - 64-bit, Microsoft Corp Windows 10 21H1 - 32-bit, Microsoft Corp Windows 10 21H1 - 64-bit, Microsoft Corp Windows 10 21H1 - ARM64",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c Windows, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043a\u0430\u043c\u0438 \u0440\u0430\u0437\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u0420\u0430\u0437\u0440\u0435\u0448\u0435\u043d\u0438\u044f, \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0438 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u043e\u043c (CWE-264)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c Windows \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043a\u0430\u043c\u0438 \u0440\u0430\u0437\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0443 %windir%\\system32\\config. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u0430 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 SeriousSAM \u0438\u043b\u0438 HiveNightmare",
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041d\u0430\u0440\u0443\u0448\u0435\u043d\u0438\u0435 \u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0430\u0446\u0438\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36934\nhttps://kb.cert.org/vuls/id/506989\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-36934\nhttps://www.rapid7.com/blog/post/2021/07/21/microsoft-sam-file-readability-cve-2021-36934-what-you-need-to-know/\nhttps://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-264",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7,2)\n\u041a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 9,3)"
}

CVE-2021-36934 (GCVE-0-2021-36934)

Vulnerability from cvelistv5 – Published: 2021-07-22 07:05 – Updated: 2026-08-10 15:11

Title

Windows Elevation of Privilege Vulnerability

Summary

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.

Severity

7.8 (High)


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

SSVC

Exploitation: active Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-04 18:15 UTC

CWE

Elevation of Privilege
CWE-noinfo Not enough information

Assigner

microsoft mitre root

References

5 references

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch
https://www.kb.cert.org/vuls/id/506989
https://portal.msrc.microsoft.com/en-US/security-…	x_refsource_MISCx_transferred
http://packetstormsecurity.com/files/164006/HiveN…	x_refsource_MISCx_transferred
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

6 products

Vendor	Product	Version
Microsoft	Windows 10 Version 1809	Affected: 10.0.17763.0 , < 10.0.17763.2114 (custom)
Microsoft	Windows 10 Version 1809	Affected: 10.0.0 , < 10.0.17763.2114 (custom)
Microsoft	Windows 10 Version 1909	Affected: 10.0.0 , < 10.0.18363.1734 (custom)
Microsoft	Windows 10 Version 2004	Affected: 10.0.0 , < 10.0.19041.1165 (custom)
Microsoft	Windows 10 Version 20H2	Affected: 10.0.0 , < 10.0.19042.1165 (custom)
Microsoft	Windows 10 Version 21H1	Affected: 10.0.0 , < 10.0.19043.1165 (custom)

Date Public

2021-07-20 14:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.