A Firefox regression update has been released for Ubuntu Linux 18.04 LTS and 20.04 LTS.

USN-5954-2: Firefox regressions

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Ubuntu Security Notice USN-5954-2
March 27, 2023

firefox regressions
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

USN-5954-1 caused some minor regressions in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

USN-5954-1 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, obtain sensitive
information across domains, or execute arbitrary code. (CVE-2023-25750,
CVE-2023-25752, CVE-2023-28162, CVE-2023-28176, CVE-2023-28177)

Lukas Bernhard discovered that Firefox did not properly manage memory
when invalidating JIT code while following an iterator. An attacker could
potentially exploits this issue to cause a denial of service.
(CVE-2023-25751)

Rob Wu discovered that Firefox did not properly manage the URLs when
following a redirect to a publicly accessible web extension file. An
attacker could potentially exploits this to obtain sensitive information.
(CVE-2023-28160)

Luan Herrera discovered that Firefox did not properly manage cross-origin
iframe when dragging a URL. An attacker could potentially exploit this
issue to perform spoofing attacks. (CVE-2023-28164)

Khiem Tran discovered that Firefox did not properly manage one-time
permissions granted to a document loaded using a file: URL. An attacker
could potentially exploit this issue to use granted one-time permissions
on the local files came from different sources. (CVE-2023-28161)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
firefox 111.0.1+build2-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
firefox 111.0.1+build2-0ubuntu0.18.04.1

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

References:
  https://ubuntu.com/security/notices/USN-5954-2
  https://ubuntu.com/security/notices/USN-5954-1
  https://launchpad.net/bugs/2012696

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/111.0.1+build2-0ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/firefox/111.0.1+build2-0ubuntu0.18.04.1