The latest release of Firefox brings fixes for two Critical vulnerabilities already seen exploited in the wild.
Mozilla has patched two Critical vulnerabilities in Firefox 74.0.1 and Firefox ESR 68.6.1, released on April 3. The US Cybersecurity and Infrastructure Security Agency (CISA) has published an alert encouraging users and admins to review the advisory and apply the necessary patches.
CVE-2020-6819 and CVE-2020-6820 have been seen exploited in targeted attacks. Both flaws can cause a use-after-free vulnerability, a type of memory corruption flaw attackers can use to execute arbitrary code or potentially enable remote code execution capabilities.
CVE-2020-6819 exists under certain conditions when running the nsDocShell destructor; a race condition can cause a use-after-free vulnerability. CVE-2020-6820 exists under certain conditions when handling a ReadableStream; a race condition can cause a use-after-free flaw. Mozilla did not provide details on how attackers are using these flaws or what their targets are.
Mozilla credits vulnerability researchers Francisco Alonso and Javier Marcos for discovering the vulnerabilities.
Read the full advisory here.
Check out The Edge, Dark Reading's new section for features, threat data, and in-depth perspectives. Today's featured story: "This Is Not Your Father's Ransomware."
About the Author(s)
You May Also Like
Guarding the Cloud: Top 5 Cloud Security Hacks and How You Can Avoid Them
April 4, 2024Cybersecurity Strategies for Small and Med Sized Businesses
April 11, 2024Defending Against Today's Threat Landscape with MDR
April 18, 2024Securing Code in the Age of AI
April 24, 2024
Black Hat USA - August 3-8 - Learn More
August 3, 2024Cybersecurity's Hottest New Technologies: What You Need To Know
March 21, 2024Black Hat Asia - April 16-19 - Learn More
April 16, 2024