=========================================================================Ubuntu Security Notice USN-6010-1
April 12, 2023

firefox vulnerabilities
=========================================================================
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, obtain sensitive
information across domains, or execute arbitrary code. (CVE-2023-29537,
CVE-2023-29540, CVE-2023-29543, CVE-2023-29544, CVE-2023-29547,
CVE-2023-29548, CVE-2023-29549, CVE-2023-29550, CVE-2023-29551)

Irvan Kurniawan discovered that Firefox did not properly manage fullscreen
notifications using a combination of window.open, fullscreen requests,
window.name assignments, and setInterval calls. An attacker could
potentially exploit this issue to perform spoofing attacks. (CVE-2023-29533)

Lukas Bernhard discovered that Firefox did not properly manage memory
when doing Garbage Collector compaction. An attacker could potentially
exploits this issue to cause a denial of service. (CVE-2023-29535)

Zx from qriousec discovered that Firefox did not properly validate the
address to free a pointer provided to the memory manager. An attacker could
potentially exploits this issue to cause a denial of service.
(CVE-2023-29536)

Alexis aka zoracon discovered that Firefox did not properly validate the
URI received by the WebExtension during a load request. An attacker could
potentially exploits this to obtain sensitive information. (CVE-2023-29538)

Trung Pham discovered that Firefox did not properly validate the filename
directive in the Content-Disposition header. An attacker could possibly
exploit this to perform reflected file download attacks potentially
tricking users to install malware. (CVE-2023-29539)

Ameen Basha M K discovered that Firefox did not properly validate downloads
of files ending in .desktop. An attacker could potentially exploits this
issue to execute arbitrary code. (CVE-2023-29541)

Update instructions:

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

Ubuntu 20.04 LTS:
  firefox                         112.0+build2-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  firefox                         112.0+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-6010-1
  CVE-2023-29533, CVE-2023-29535, CVE-2023-29536, CVE-2023-29537,
  CVE-2023-29538, CVE-2023-29539, CVE-2023-29540, CVE-2023-29541,
  CVE-2023-29543, CVE-2023-29544, CVE-2023-29547, CVE-2023-29548,
  CVE-2023-29549, CVE-2023-29550, CVE-2023-29551

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/112.0+build2-0ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/firefox/112.0+build2-0ubuntu0.18.04.1