USN-6010-2: Firefox regressions

Releases

• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• firefox - Mozilla Open Source web browser

Details

USN-6010-1 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-2023-29537,
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

• firefox - 112.0.1+build1-0ubuntu0.20.04.1

Ubuntu 18.04

• firefox - 112.0.1+build1-0ubuntu0.18.04.1

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

References

• https://launchpad.net/bugs/2016835