USN-5321-2: Firefox vulnerabilities

Releases

• Ubuntu 21.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• firefox - Mozilla Open Source web browser

Details

USN-5321-1 fixed vulnerabilities in Firefox. The update didn't include
arm64 because of a regression. This update provides the corresponding
update for arm64.

This update also removes Yandex and Mail.ru as optional search providers
in the drop-down search menu.

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 - 98.0.1+build2-0ubuntu0.21.10.1

Ubuntu 20.04

• firefox - 98.0.1+build2-0ubuntu0.20.04.1

Ubuntu 18.04

• firefox - 98.0.1+build2-0ubuntu0.18.04.1

After a standard system update you need to restart Firefox to make
all the necessary changes.

References

• CVE-2022-26382
• CVE-2022-26381
• CVE-2022-0843
• CVE-2022-26387
• CVE-2022-26383
• CVE-2022-26385
• CVE-2022-26384

Related notices

• USN-5321-1
• USN-5345-1