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

USN-5726-1: Firefox vulnerabilities

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Ubuntu Security Notice USN-5726-1
November 16, 2022

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

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 contents of the
addressbar, bypass security restrictions, cross-site tracing or execute
arbitrary code. (CVE-2022-45403, CVE-2022-45404, CVE-2022-45405,
CVE-2022-45406, CVE-2022-45407, CVE-2022-45408, CVE-2022-45409, CVE-2022-45410,
CVE-2022-45411, CVE-2022-45413, CVE-2022-40674, CVE-2022-45418, CVE-2022-45419,
CVE-2022-45420, CVE-2022-45421)

Armin Ebert discovered that Firefox did not properly manage while resolving
file symlink. If a user were tricked into opening a specially crafted weblink,
an attacker could potentially exploit these to cause a denial of service.
(CVE-2022-45412)

Jefferson Scher and Jayateertha Guruprasad discovered that Firefox did not
properly sanitize the HTML download file extension under certain circumstances.
If a user were tricked into downloading and executing malicious content, a
remote attacker could execute arbitrary code with the privileges of the user
invoking the programs. (CVE-2022-45415)

Erik Kraft, Martin Schwarzl, and Andrew McCreight discovered that Firefox
incorrectly handled keyboard events. An attacker could possibly use this
issue to perform a timing side-channel attack and possibly figure out which
keys are being pressed. (CVE-2022-45416)

Kagami discovered that Firefox did not detect Private Browsing Mode correctly.
An attacker could possibly use this issue to obtain sensitive information about
Private Browsing Mode.
(CVE-2022-45417)

Update instructions:

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

Ubuntu 20.04 LTS:
firefox 107.0+build2-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
firefox 107.0+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-5726-1
CVE-2022-40674, CVE-2022-45403, CVE-2022-45404, CVE-2022-45405,
CVE-2022-45406, CVE-2022-45407, CVE-2022-45408, CVE-2022-45409,
CVE-2022-45410, CVE-2022-45411, CVE-2022-45412, CVE-2022-45413,
CVE-2022-45415, CVE-2022-45416, CVE-2022-45417, CVE-2022-45418,
CVE-2022-45419, CVE-2022-45420, CVE-2022-45421

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/107.0+build2-0ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/firefox/107.0+build2-0ubuntu0.18.04.1