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kasperskyKaspersky LabKLA12349
HistoryNov 09, 2021 - 12:00 a.m.

KLA12349 Multiple vulnerabilities in Microsoft Browser

2021-11-0900:00:00
Kaspersky Lab
threats.kaspersky.com
34

5.1 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

4.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

7.2 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

68.9%

Multiple vulnerabilities were found in Microsoft Browser. Malicious users can exploit these vulnerabilities to spoof user interface, execute arbitrary code.

Below is a complete list of vulnerabilities:

  1. A spoofing vulnerability in Microsoft Edge can be exploited remotely to spoof user interface.
  2. A memory corruption vulnerability in Chakra Scripting Engine can be exploited remotely to execute arbitrary code.

Original advisories

CVE-2021-41351

CVE-2021-42279

Related products

Microsoft-Edge

ChakraCore

CVE list

CVE-2021-42279 unknown

CVE-2021-41351 unknown

KB list

5007206

5007186

5007215

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.

  • SUI

Spoof user interface. Exploitation of vulnerabilities with this impact can lead to changes in user interface to beguile user into inaccurate behavior.

Affected Products

  • Microsoft Edge (Chromium-based) in IE ModeChakraCore

5.1 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

4.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

7.2 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

68.9%