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kasperskyKaspersky LabKLA12341
HistoryNov 09, 2021 - 12:00 a.m.

KLA12341 Multiple vulnerabilities in Microsoft Products (ESU)

2021-11-0900:00:00
Kaspersky Lab
threats.kaspersky.com
30

8.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.7 High

AI Score

Confidence

High

7.2 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.904 High

EPSS

Percentile

98.8%

Multiple vulnerabilities were found in Microsoft Products (Extended Security Update). Malicious users can exploit these vulnerabilities to gain privileges, obtain sensitive information, execute arbitrary code, 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. An elevation of privilege vulnerability in Credential Security Support Provider Protocol (CredSSP) can be exploited remotely to gain privileges.
  11. A denial of service vulnerability in Windows Hyper-V can be exploited remotely to cause denial of service.

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-2021-41366

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-Server-2012

Microsoft-Windows-7

Microsoft-Windows-Server-2008

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-2021-42284 high

CVE-2021-41366 warning

KB list

5007233

5007236

5007263

5007246

5007260

5007255

5007245

5007247

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.

  • 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 Server 2012 R2Windows Server 2012 (Server Core installation)Windows 7 for x64-based Systems Service Pack 1Windows Server 2012 R2 (Server Core installation)Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)Windows Server 2008 for x64-based Systems Service Pack 2Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)Windows Server 2008 for 32-bit Systems Service Pack 2Windows Server 2012Windows 7 for 32-bit Systems Service Pack 1Windows Server 2008 R2 for x64-based Systems Service Pack 1

References

8.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.7 High

AI Score

Confidence

High

7.2 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.904 High

EPSS

Percentile

98.8%