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kasperskyKaspersky LabKLA12128
HistoryMar 23, 2021 - 12:00 a.m.

KLA12128 Multiple vulnerabilities in Mozilla Firefox ESR

2021-03-2300:00:00
Kaspersky Lab
threats.kaspersky.com
32

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

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.5 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

67.8%

Multiple vulnerabilities were found in Mozilla Firefox ESR. Malicious users can exploit these vulnerabilities to execute arbitrary code, obtain sensitive information, spoof user interface, cause denial of service.

Below is a complete list of vulnerabilities:

  1. A memory safety vulnerability can be exploited to execute arbitrary code.
  2. An information disclosure vulnerability can be exploited via special crafted webpage to obtain sensitive information.
  3. A security UI vulnerability can be exploited via special crafted extention to spoof user interface and obtain sensitive information.
  4. An out of bounds read vulnerability in WebGL can be exploited via special crafted object to cause denial of service or obtain sensitive information.
  5. A transient execution vulnerability can be exploited to obtain sensitive infromation or cause denial of service.
  6. A security bypass vulnerability in Angle graphics library can be exploited to bypass security restrictions.

Original advisories

MFSA2021-11

Related products

Mozilla-Firefox-ESR

CVE list

CVE-2021-23987 critical

CVE-2021-23982 high

CVE-2021-23984 high

CVE-2021-23981 critical

CVE-2021-29955 high

CVE-2021-4127 critical

Solution

Update to the latest version

Download Firefox ESR

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.

  • 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

  • Mozilla Firefox ESR earlier than 78.9

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

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.5 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

67.8%