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kasperskyKaspersky LabKLA12246
HistoryJul 15, 2021 - 12:00 a.m.

KLA12246 PE vulnerability in Microsoft Products (ESU)

2021-07-1500:00:00
Kaspersky Lab
threats.kaspersky.com
23

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.6

Confidence

High

EPSS

0.01

Percentile

83.7%

An elevation of privilege vulnerability was found in Microsoft Products (Extended Support Update). Malicious users can exploit this vulnerability to gain privileges.

Original advisories

CVE-2021-34481

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-8

Microsoft-Windows-7

Microsoft-Windows-Server-2008

Windows-RT

Microsoft-Windows-10

CVE list

CVE-2021-34481 critical

KB list

5005090

5005089

5005095

5005088

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.

  • 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 1809 for ARM64-based SystemsWindows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)Windows 10 for x64-based SystemsWindows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)Windows 10 Version 21H1 for 32-bit SystemsWindows 10 Version 1909 for ARM64-based SystemsWindows 7 for 32-bit Systems Service Pack 1Windows 8.1 for 32-bit systemsWindows 10 for 32-bit SystemsWindows Server 2012Windows Server 2019 (Server Core installation)Windows 10 Version 1909 for x64-based SystemsWindows Server 2012 R2Windows 10 Version 20H2 for ARM64-based SystemsWindows 10 Version 1909 for 32-bit SystemsWindows 8.1 for x64-based systemsWindows Server 2008 for 32-bit Systems Service Pack 2Windows 10 Version 1607 for 32-bit SystemsWindows Server 2012 (Server Core installation)Windows 7 for x64-based Systems Service Pack 1Windows 10 Version 20H2 for 32-bit SystemsWindows Server, version 2004 (Server Core installation)Windows 10 Version 2004 for x64-based SystemsWindows 10 Version 2004 for ARM64-based SystemsWindows Server 2008 R2 for x64-based Systems Service Pack 1Windows Server 2019Windows Server 2008 for x64-based Systems Service Pack 2Windows Server, version 20H2 (Server Core Installation)Windows 10 Version 21H1 for x64-based SystemsWindows Server 2016Windows 10 Version 1607 for x64-based SystemsWindows 10 Version 20H2 for x64-based SystemsWindows 10 Version 21H1 for ARM64-based SystemsWindows 10 Version 1809 for 32-bit SystemsWindows Server 2012 R2 (Server Core installation)Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)Windows 10 Version 1809 for x64-based SystemsWindows Server 2016 (Server Core installation)Windows RT 8.1Windows 10 Version 2004 for 32-bit Systems

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.6

Confidence

High

EPSS

0.01

Percentile

83.7%