USN-6143-3: Firefox regressions

Releases

• Ubuntu 20.04 LTS

Packages

• firefox - Mozilla Open Source web browser

Details

USN-6143-1 fixed vulnerabilities and USN-6143-2 fixed minor regressions 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-2023-34414,
CVE-2023-34416, CVE-2023-34417)

Jun Kokatsu discovered that Firefox did not properly validate site-isolated
process for a document loaded from a data: URL that was the result of a
redirect, leading to an open redirect attack. An attacker could possibly
use this issue to perform phishing attacks. (CVE-2023-34415)

Update instructions

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

Ubuntu 20.04

• firefox - 114.0.2+build1-0ubuntu0.20.04.1

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

References

• https://launchpad.net/bugs/2024513