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kasperskyKaspersky LabKLA12345
HistoryNov 09, 2021 - 12:00 a.m.

KLA12345 Multiple vulnerabilities in Microsoft Windows

2021-11-0900:00:00
Kaspersky Lab
threats.kaspersky.com
46

9 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

9.7 High

AI Score

Confidence

High

7.7 High

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.904 High

EPSS

Percentile

98.8%

Multiple vulnerabilities were found in Microsoft Windows. Malicious users can exploit these vulnerabilities to gain privileges, obtain sensitive information, execute arbitrary code, bypass security restrictions, cause denial of service.

Below is a complete list of vulnerabilities:

  1. An elevation of privilege vulnerability in Active Directory Domain Services can be exploited remotely to gain privileges.
  2. An elevation of privilege vulnerability in NTFS can be exploited remotely to gain privileges.
  3. An information disclosure vulnerability in Windows Remote Desktop Protocol (RDP) can be exploited remotely to obtain sensitive information.
  4. An information disclosure vulnerability in Remote Desktop Protocol Client can be exploited remotely to obtain sensitive information.
  5. A remote code execution vulnerability in Remote Desktop Client can be exploited remotely to execute arbitrary code.
  6. An elevation of privilege vulnerability in Windows Fast FAT File System Driver can be exploited remotely to gain privileges.
  7. An elevation of privilege vulnerability in Windows Installer can be exploited remotely to gain privileges.
  8. An elevation of privilege vulnerability in Windows Kernel can be exploited remotely to gain privileges.
  9. A remote code execution vulnerability in Microsoft COM for Windows can be exploited remotely to execute arbitrary code.
  10. A remote code execution vulnerability in Microsoft Virtual Machine Bus (VMBus) can be exploited remotely to execute arbitrary code.
  11. An elevation of privilege vulnerability in Windows Feedback Hub can be exploited remotely to gain privileges.
  12. A security feature bypass vulnerability in Windows Hello can be exploited remotely to bypass security restrictions.
  13. A remote code execution vulnerability in Microsoft Windows Media Foundation can be exploited remotely to execute arbitrary code.
  14. An elevation of privilege vulnerability in Windows Desktop Bridge can be exploited remotely to gain privileges.
  15. A memory corruption vulnerability in Chakra Scripting Engine can be exploited remotely to execute arbitrary code.
  16. A denial of service vulnerability in Windows Hyper-V can be exploited remotely to cause denial of service.
  17. An elevation of privilege vulnerability in Windows Core Shell SI Host Extension Framework for Composable Shell can be exploited remotely to gain privileges.
  18. A denial of service vulnerability in Windows Hyper-V Discrete Device Assignment (DDA) can be exploited remotely to cause denial of service.
  19. An elevation of privilege vulnerability in Diagnostics Hub Standard Collector can be exploited remotely to gain privileges.
  20. A remote code execution vulnerability in Windows NTFS can be exploited remotely to execute arbitrary code.
  21. A denial of service vulnerability in Windows can be exploited remotely to cause denial of service.
  22. An elevation of privilege vulnerability in Credential Security Support Provider Protocol (CredSSP) can be exploited remotely to gain privileges.

Original advisories

CVE-2021-42282

CVE-2021-41367

CVE-2021-41371

CVE-2021-38665

CVE-2021-38666

CVE-2021-42291

CVE-2021-42278

CVE-2021-41377

CVE-2021-41379

CVE-2021-42285

CVE-2021-42283

CVE-2021-42275

CVE-2021-38631

CVE-2021-41370

CVE-2021-42287

CVE-2021-26443

CVE-2021-42280

CVE-2021-42288

CVE-2021-42276

CVE-2021-36957

CVE-2021-42279

CVE-2021-42284

CVE-2021-42286

CVE-2021-42274

CVE-2021-42277

CVE-2021-41378

CVE-2021-41356

CVE-2021-41366

CVE-2021-41366

CVE-2021-42284

Exploitation

Public exploits exist for this vulnerability.

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.

Related products

Microsoft-Windows

Microsoft-Windows-Server

Microsoft-Windows-8

Windows-RT

Microsoft-Windows-10

Microsoft-Windows-Server-2016

Microsoft-Windows-Server-2019

Microsoft-Windows-11

Microsoft-Remote-Desktop

CVE list

CVE-2021-42282 high

CVE-2021-41367 warning

CVE-2021-41371 warning

CVE-2021-38665 warning

CVE-2021-38666 high

CVE-2021-42291 high

CVE-2021-42278 high

CVE-2021-41377 warning

CVE-2021-41379 warning

CVE-2021-42285 high

CVE-2021-42283 warning

CVE-2021-42275 high

CVE-2021-38631 warning

CVE-2021-41370 warning

CVE-2021-42287 high

CVE-2021-26443 critical

CVE-2021-42280 warning

CVE-2021-42288 warning

CVE-2021-42276 high

CVE-2021-36957 warning

CVE-2021-42279 high

CVE-2021-42284 high

CVE-2021-42286 warning

CVE-2021-42274 warning

CVE-2021-42277 warning

CVE-2021-41378 high

CVE-2021-41356 warning

CVE-2021-41366 warning

KB list

5007255

5007206

5007207

5007186

5007192

5007215

5007205

5007247

5007189

Solution

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

Impacts

  • ACE

Arbitrary code execution. Exploitation of vulnerabilities with this impact can lead to executing by abuser any code or commands at vulnerable machine or process.

  • OSI

Obtain sensitive information. Exploitation of vulnerabilities with this impact can lead to capturing by abuser information, critical for user or system.

  • DoS

Denial of service. Exploitation of vulnerabilities with this impact can lead to loss of system availability or critical functional fault.

  • SB

Security bypass. Exploitation of vulnerabilities with this impact can lead to performing actions restricted by current security settings.

  • PE

Privilege escalation. Exploitation of vulnerabilities with this impact can lead to performing by abuser actions, which are normally disallowed for current role.

Affected Products

  • Windows 10 Version 1607 for x64-based SystemsWindows Server 2016Windows 8.1 for 32-bit systemsWindows 10 Version 20H2 for 32-bit SystemsWindows Server 2022Windows Server 2019Windows Server, version 2004 (Server Core installation)Windows 10 for x64-based SystemsWindows 10 Version 1909 for x64-based SystemsWindows 10 Version 2004 for 32-bit SystemsWindows RT 8.1Windows 10 Version 21H1 for ARM64-based SystemsWindows Server 2019 (Server Core installation)Windows Server 2022 (Server Core installation)Windows 10 Version 21H1 for 32-bit SystemsWindows 8.1 for x64-based systemsWindows 10 Version 1909 for ARM64-based SystemsWindows 10 Version 1809 for 32-bit SystemsWindows 10 Version 20H2 for ARM64-based SystemsWindows 10 Version 1909 for 32-bit SystemsWindows 10 Version 1607 for 32-bit SystemsWindows Server, version 20H2 (Server Core Installation)Windows Server 2016 (Server Core installation)Windows 10 Version 2004 for x64-based SystemsWindows 10 Version 2004 for ARM64-based SystemsWindows 10 Version 21H1 for x64-based SystemsWindows 10 Version 1809 for ARM64-based SystemsWindows 10 Version 1809 for x64-based SystemsWindows 10 for 32-bit SystemsWindows 11 version 21H2 for ARM64-based SystemsWindows 11 version 21H2 for x64-based SystemsRemote Desktop client for Windows Desktop

References

9 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

9.7 High

AI Score

Confidence

High

7.7 High

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.904 High

EPSS

Percentile

98.8%