https://usn.ubuntu.com/4474-2/

USN-4474-2: Firefox regressions

firefox regressions
A security issue affects these releases of Ubuntu and its derivatives:
Ubuntu 20.04 LTS
Ubuntu 18.04 LTS
Ubuntu 16.04 LTS
Summary
USN-4474-1 caused some minor regressions in Firefox.
Software Description
firefox - Mozilla Open Source web browser
Details
USN-4474-1 fixed vulnerabilities in Firefox. The update introduced various minor regressions. This update fixes the problem.
We apologize for the inconvenience.
Original advisory 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, trick the user in to installing a malicious extension, spoof the URL bar, leak sensitive information between origins, or execute arbitrary code. (CVE-2020-15664, CVE-2020-15665, CVE-2020-15666, CVE-2020-15670)
It was discovered that NSS incorrectly handled certain signatures. An attacker could possibly use this issue to expose sensitive information. (CVE-2020-12400, CVE-2020-12401, CVE-2020-6829)
A data race was discovered when importing certificate information in to the trust store. An attacker could potentially exploit this to cause an unspecified impact. (CVE-2020-15668)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS
firefox - 80.0.1+build1-0ubuntu0.20.04.1
Ubuntu 18.04 LTS
firefox - 80.0.1+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
firefox - 80.0.1+build1-0ubuntu0.16.04.1
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
USN-4474-1
LP: 1893021
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CVE-2020-15670

CVE-2020-15666

CVE-2020-15665

CVE-2020-15664

CVE-2020-15668

CVE-2020-6829

CVE-2020-12400

CVE-2020-12401

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