Firefox 74.0.1 released

[Divine_Barakah]

This update delivered security fixes.

Security Vulnerabilities fixed in Firefox 74.0.1 and Firefox ESR 68.6.1

www.mozilla.org

 

[South Park]

It must have been a doozy, because Portable Firefox was already updated several hours ago on Source Forge. Normally there's a lag time of 1-2 days. PortableApps.com - Browse /Mozilla Firefox, Portable Ed. at SourceForge.net

 

[Antus67]

Mozilla has released critical security updates for Firefox and Firefox ESR on Friday, patching two vulnerabilities that are being actively exploited by attackers.

fixed in Firefox 74.0.1 and Firefox ESR 68.6.1 are:

• CVE-2020-6819: A use-after-free flaw caused by a race condition while running the nsDocShell destructor
• CVE-2020-6820: A use-after-free caused by a race condition when handling a ReadableStream

No additional details about them have been provided and the bug entries in Mozilla’s bug database are still unaccessible to the wider public. The bugs have been rated “critical”, which means that chances are high they can lead to remote code execution (whether individually or concatenated together).

The vulnerabilities (and presumably their active exploitation) have been flagged by security researchers Francisco Alonso and Javier Marcos.

One of Alonso’s comments on Twitter seems to indicate that the flaws may also affect other browsers:

Source: Two critical Firefox vulnerabilities exploited by attackers, patch now! - Help Net Security