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AUSCERT External Security Bulletin Redistribution
ESB-2020.1208
Mozilla Foundation Security Advisory 2020-11
6 April 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Mozilla Firefox
Mozilla Firefox Extended Support Release
Publisher: Mozilla
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-6820 CVE-2020-6819
Original Bulletin:
https://www.mozilla.org/en-US/security/advisories/mfsa2020-11/
Comment: Mozilla have advised that these vulnerabilites are being exploited
in the wild via targeted attacks.
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Mozilla Foundation Security Advisory 2020-11
Security Vulnerabilities fixed in Firefox 74.0.1 and Firefox ESR 68.6.1
Announced
April 3, 2020
Impact
critical
Products
Firefox, Firefox ESR
Fixed in
Firefox 74.0.1
Firefox ESR 68.6.1
# CVE-2020-6819: Use-after-free while running the nsDocShell destructor
Reporter
Francisco Alonso @revskills working with Javier Marcos of @JMPSec
Impact
critical
Description
Under certain conditions, when running the nsDocShell destructor, a race
condition can cause a use-after-free. We are aware of targeted attacks in the
wild abusing this flaw.
References
o Bug 1620818
# CVE-2020-6820: Use-after-free when handling a ReadableStream
Reporter
Francisco Alonso @revskills working with Javier Marcos of @JMPSec
Impact
critical
Description
Under certain conditions, when handling a ReadableStream, a race condition can
cause a use-after-free. We are aware of targeted attacks in the wild abusing
this flaw.
References
o Bug 1626728
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