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AUSCERT External Security Bulletin Redistribution
ESB-2020.1235
USN-4323-1: Firefox vulnerabilities
8 April 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Firefox
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Unauthorised Access -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-6826 CVE-2020-6825 CVE-2020-6824
CVE-2020-6823 CVE-2020-6822 CVE-2020-6821
Reference: ESB-2020.1228
Original Bulletin:
https://usn.ubuntu.com/4323-1/
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USN-4323-1: Firefox vulnerabilities
7 April 2020
firefox vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.10
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
Firefox could be made to crash or run programs as your login if it opened a
malicious website.
Software Description
o firefox - Mozilla Open Source web browser
Details
Multiple security issues were discovered in Firefox. If a user were tricked in
to opening a specially crafted website, an attacker could potentially exploit
these to cause a denial of service, obtain sensitive information, or execute
arbitrary code. (CVE-2020-6821, CVE-2020-6822, CVE-2020-6824, CVE-2020-6825,
CVE-2020-6826)
It was discovered that extensions could obtain auth codes from OAuth login
flows in some circumstances. If a user were tricked in to installing a
specially crafted extension, an attacker could potentially exploit this to
obtain access to the user's account. (CVE-2020-6823)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.10
firefox - 75.0+build3-0ubuntu0.19.10.1
Ubuntu 18.04 LTS
firefox - 75.0+build3-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
firefox - 75.0+build3-0ubuntu0.16.04.1
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
After a standard system update you need to restart Firefox to make all the
necessary changes.
References
o CVE-2020-6821
o CVE-2020-6822
o CVE-2020-6823
o CVE-2020-6824
o CVE-2020-6825
o CVE-2020-6826
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