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Ubuntu Security Notice USN-5321-3

Ubuntu Security Notice USN-5321-3
Posted Mar 25, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5321-3 - USN-5321-1 fixed vulnerabilities in Firefox. The update introduced several minor regressions. This update fixes the problem. 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. 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.

tags | advisory, denial of service, arbitrary, local, spoof, vulnerability
systems | linux, ubuntu
advisories | CVE-2022-26383, CVE-2022-26387
SHA-256 | 3d7bc90a79a0814602089234f5c04c4d39f5707208f69d54d7ec8df656aa52b2

Ubuntu Security Notice USN-5321-3

Change Mirror Download
==========================================================================
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
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