=========================================================================Ubuntu Security Notice USN-5321-3
March 24, 2022
firefox regressions
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
USN-5321-1 introduced minor regressions in Firefox.
Software Description:
- firefox: Mozilla Open Source web browser
Details:
USN-5321-1 fixed vulnerabilities in Firefox. The update introduced
several 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 into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, spoof the browser
UI, bypass security restrictions, obtain sensitive information, or execute
arbitrary code. (CVE-2022-0843, CVE-2022-26381, CVE-2022-26382,
CVE-2022-26383, CVE-2022-26384, CVE-2022-26385)
A TOCTOU bug was discovered when verifying addon signatures during
install. A local attacker could potentially exploit this to trick a
user into installing an addon with an invalid signature.
(CVE-2022-26387)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 21.10:
firefox 98.0.2+build1-0ubuntu0.21.10.1
Ubuntu 20.04 LTS:
firefox 98.0.2+build1-0ubuntu0.20.04.1
Ubuntu 18.04 LTS:
firefox 98.0.2+build1-0ubuntu0.18.04.1
After a standard system update you need to restart Firefox to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5321-3
https://ubuntu.com/security/notices/USN-5321-1
https://launchpad.net/bugs/1966306
Package Information:
https://launchpad.net/ubuntu/+source/firefox/98.0.2+build1-0ubuntu0.21.10.1
https://launchpad.net/ubuntu/+source/firefox/98.0.2+build1-0ubuntu0.20.04.1
https://launchpad.net/ubuntu/+source/firefox/98.0.2+build1-0ubuntu0.18.04.1
