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kasperskyKaspersky LabKLA12271
HistorySep 02, 2021 - 12:00 a.m.

KLA12271 Multiple vulnerabilities in Microsoft Browser

2021-09-0200:00:00
Kaspersky Lab
threats.kaspersky.com
14

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

10 High

AI Score

Confidence

High

0.017 Low

EPSS

Percentile

87.7%

Multiple vulnerabilities were found in Microsoft Browser. Malicious users can exploit these vulnerabilities to execute arbitrary code, cause denial of service, bypass security restrictions, spoof user interface, obtain sensitive information.

Below is a complete list of vulnerabilities:

  1. Use after free vulnerability in WebApp Installs can be exploited to cause denial of service or execute arbitrary code.
  2. Use after free vulnerability in Autofill can be exploited to cause denial of service or execute arbitrary code.
  3. Policy enforcement vulnerability in Blink can be exploited to bypass security restrictions.
  4. Security UI vulnerability in Autofill can be exploited to spoof user interface.
  5. Use after free vulnerability in Base internals can be exploited to cause denial of service or execute arbitrary code.
  6. Use after free vulnerability in Permissions can be exploited to cause denial of service or execute arbitrary code.
  7. Implementation vulnerability in DevTools can be exploited to cause denial of service.
  8. Use after free vulnerability in Sign-Incan be exploited to cause denial of service or execute arbitrary code.
  9. Use after free vulnerability in WebRTC can be exploited to cause denial of service or execute arbitrary code.
  10. Use after free vulnerability in Extenstions API can be exploited to cause denial of service or execute arbitrary code.
  11. Use after free vulnerability in Media can be exploited to cause denial of service or execute arbitrary code.
  12. Use after free vulnerability in Blink can be exploited to cause denial of service or execute arbitrary code.
  13. Use after free vulnerability in Web Share can be exploited to cause denial of service or execute arbitrary code.
  14. Data leak vulnerability in Navigation can be exploited to obtain sensitive information.
  15. Use after free vulnerability in Bookmarks can be exploited to cause denial of service or execute arbitrary code.
  16. Policy bypass vulnerability in Blink can be exploited to bypass security restrictions.
  17. Heap buffer overflow vulnerability in TabStrip can be exploited to cause denial of service.
  18. An information disclosure vulnerability in Microsoft Edge for Android can be exploited remotely to obtain sensitive information.
  19. An elevation of privilege vulnerability in Microsoft Edge (Chromium-based) can be exploited remotely to gain privileges.
  20. A spoofing vulnerability in Microsoft Edge for Android can be exploited remotely to spoof user interface.
  21. A spoofing vulnerability in Microsoft Edge for iOS can be exploited remotely to spoof user interface.

Original advisories

CVE-2021-30607

CVE-2021-26439

CVE-2021-30612

CVE-2021-30618

CVE-2021-30621

CVE-2021-30613

CVE-2021-30616

CVE-2021-30623

CVE-2021-30606

CVE-2021-30617

CVE-2021-30620

CVE-2021-30610

CVE-2021-30614

CVE-2021-30624

CVE-2021-30615

CVE-2021-30622

CVE-2021-30619

CVE-2021-30609

CVE-2021-30611

CVE-2021-30608

CVE-2021-26436

CVE-2021-36930

CVE-2021-38641

CVE-2021-38642

Related products

Microsoft-Edge

CVE list

CVE-2021-30622 critical

CVE-2021-30624 critical

CVE-2021-30620 critical

CVE-2021-30621 high

CVE-2021-30613 critical

CVE-2021-30607 critical

CVE-2021-30618 critical

CVE-2021-30609 critical

CVE-2021-30611 critical

CVE-2021-30610 critical

CVE-2021-30616 critical

CVE-2021-30606 critical

CVE-2021-30619 high

CVE-2021-30608 critical

CVE-2021-30612 critical

CVE-2021-30615 high

CVE-2021-30623 critical

CVE-2021-30617 high

CVE-2021-30614 critical

CVE-2021-26439 warning

CVE-2021-26436 high

CVE-2021-36930 high

CVE-2021-38641 high

CVE-2021-38642 high

KB list

Solution

Install necessary updates from the Settings and more menu, that are listed in your About Microsoft Edge page (Microsoft Edge About page usually can be accessed from the Help and feedback option)

Microsoft Edge update settings

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.

  • CI

Code injection. Exploitation of vulnerabilities with this impact can lead to changes in target code.

  • 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.

  • 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 for AndroidMicrosoft Edge (Chromium-based)

References

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

10 High

AI Score

Confidence

High

0.017 Low

EPSS

Percentile

87.7%