• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer
  • Jobs
  • Career
    • Cyber Security Training
    • Work from Home
    • Cyber Security Analyst
    • Remote Work – Six Ways to Keep Your Data Safe When Working Remotely
  • Field Guide
  • Newsletter Signup
  • Deals
  • News
AskCyberSecurity.com

AskCyberSecurity.com

Cyber Security News & Information

  • Home
  • Data Privacy
    • Gamers
    • Government Cyber Security
      • Legislation
      • Standards
        • What are the risks of computer security?
        • Medical Cyber Security
    • Social Media
  • Security
    • Data Breaches
    • Scams
    • Malware
  • Software
    • Apps
    • Web Browsers
  • Glossary
    • Cyber Security Acronyms
  • About Ask Cyber Security
    • Authors
    • Contact Us
  • VPN
    • How Do I Know If My VPN is Working?
    • Best Free VPN iPhone
    • Why Use a VPN?
    • NordVPN vs IPVanish
    • Private Internet Access Download
    • Best VPN for Streaming
      • TikTok VPN
    • VPN Porn
    • Computer Security Software – What You Really Need
  • Tutorials
AskCyber Home » News » web browser » DHS Warns of Critical Security Patches for Mozilla Firefox

DHS Warns of Critical Security Patches for Mozilla Firefox

2020-04-06 by Michelle Dvorak

DHS Warns Mozilla Security Advisory 2020-11

Mozilla Pushes Updates to Patch Security Bugs That Allow Hackers to Take Control Computers – Mozilla Security Advisory 2020-11

The Department of Homeland Security (DHS) Cybersecurity and Infrastructure Security Agency (CISA) published an alert that Mozilla released critical security patches for Firefox and Firefox ESR web browsers. The update fixes two zero-day vulnerabilities that could allow hackers to take control of affected systems. Windows, macOS, and Linux versions of Firefox are affected. Mozilla pushed the security update over the weekend. The Canadian Centre for Cysbecurity issued their own alert.

Mozilla Foundation Security Advisory 2020-11 reports that the vulnerabilities affect Firefox 74.0.1 and Firefox ESR 68.6.1. The update patches three Common Vulnerabilities and Exposures.

  • CVE-2020-6819 Use-after-free while running the nsDocShell destructor
  • CVE-2020-6820 Use-after-free when handling a ReadableStream

Both flaws have been seen as targeted attacks in the wild according to Mozilla. Both CVE-2020-6819 and CVE-2020-6820 are use-after-free vulnerabilities which is a type of memory corruption flaw used to execute arbitrary code or to enable remote code execution capabilities.

Patches are available for Firefox 74.0.1 for Windows 64-bit, Firefox 74.0.1 for Windows 32-bit, Firefox 74.0.1 for macOS, Firefox 74.0.1 for Linux 64-bit, and Firefox 74.0.1 for Linux 32-bit. Firefox users and admins should review the Mozilla Foundation Security Advisory and apply the necessary updates.

Mozilla Web Browser 74.0.1
Mozilla Web Browser 74.0.1

How To See Your Firefox Version

  1. Open Firefox
  2. Click on the three horizontal lines (menu) in the upper right corber of your screen
  3. Select Help
  4. Select More to See the Firefox Version

Just a few days later Mozilla issued another set of security pactches and upgraded to Firefox 75. This round patched three high-priority security bigs as well as three moderate vulnerabilities.

  • CVE-2020-6821: Uninitialized memory could be read when using the WebGL copyTexSubImage method
  • CVE-2020-6825: Memory safety bugs fixed in Firefox 75 and Firefox ESR 68.7
  • CVE-2020-6826: Memory safety bugs fixed in Firefox 75

Security Patches are Critical

Security patches are updates to apps, software, hardware, computers, smartphones, routers, and other internet connected devices. All hardware and software require updates to keep them secured from bad actors and malicious computer code that can compromise device cybersecurity and data privacy. Some updates are only for the sake of adding features, but often they are to patch vulnerabilities, that if left as is, compromise the device and everything on it. Outdated software is how many major ransomware attacks succeed.

WannaCry ransomware attack of 2017 spread rapidly through unpatched Windows machines. It encrypted all of the data to infected computers and waited for the user to pay a ransom to regain control. Europol estimated that about 200,000 computers were infected in 150 countries. The entire British National Health Service was also crippled by WannaCry. Computers in the United States were mostly unaffected because Microsoft has issued a security patch months earlier. Both the US and UK governments blamed North Korean hackers.

Filed Under: web browser

About Michelle Dvorak

Michelle writes about cyber security, data privacy focusing on social media privacy as well as how to protect your IoT devices. She has worked in internet technology for over 20 years and owns METRONY, LLC. Michelle earned a B.S. in Engineering from Rensselaer Polytechnic Institute. Michelle published a guide to Cyber Security for Business Travelers


LinkedInTwitterFacebook

Primary Sidebar

Subscribe to Our Free Newsletter

We Don't Share or Sell Your Info

Web Browsers

Where Are My Saved Passwords in Chrome?

Google Removes 70 Malicious Browser Add-ons from Chrome Web Store

Firefox 75 Reports Your Browser Settings to Mozilla

Categories

Cyber Security Field Guide

Computer Security While TravelingGet Our Cyber Security Field Guide - Available on Amazon!

Recent Posts

Airline Supply Chain Hack: Saturday Sitrep

Cloud Security Consultant – Location Negotiable

Vaccines for Sale on Dark Web Marketplaces

Cyber Information Systems Security Manager 2

Google Says Advertisers Don’t Need to Track Individual Across the Web

IPVanish

IPVanish VPN

Cyber Security News

Cloud Security Consultant – Location Negotiable

… [Read More...] about Cloud Security Consultant – Location Negotiable

Vaccines for Sale on Dark Web Marketplaces

… [Read More...] about Vaccines for Sale on Dark Web Marketplaces

Google Says Advertisers Don’t Need to Track Individual Across the Web

… [Read More...] about Google Says Advertisers Don’t Need to Track Individual Across the Web

Malaysia Airlines Reports Data Breach

… [Read More...] about Malaysia Airlines Reports Data Breach

More Cyber Security News

Tags

amazon Android app Apple bitcoin China chrome CISA credit card Cyber Attack DHS Equifax Europe Facebook facial recognition FBI Firefox FTC games GDPR Google Government hacker identity theft India iPhone Iran IRS LinkedIn Microsoft North Korea PayPal phishing phishing email ransomware Romance Scam Russia smartphone tax scam TikTok tutorial VPN WhatsApp WiFi Windows

Government

FTC Releases Cyber Threat Video Playlist

Malware Found on US Government Funded Phones

UK NCA Reaches Out to Youth to Deter Cybercrimes

Texas DOT Hit by Ransomware Attack

More Posts from this Category

Footer

Menu

  • Home
  • About
  • Authors
  • Newsletter Signup
  • PRIVACY POLICY

Search

Why Use a VPN?

NordVPN vs IPVanish VPN Review

NAVIGATION

  • Data Breaches
  • Data Privacy
  • Gamers
  • Scams
  • Malware

MEMBER NJCCIC

New Jersey Cybersecurity & Communications Integration Cell

STAY CONNECTED

  • Facebook
  • Instagram
  • Pinterest
  • YouTube
  • Twitter
  • RSS

Copyright © 2021 · AskCyberSecurity.com · METRONY, LLC

Go to mobile version