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USN-6010-2: Firefox regressions

18 April 2023

USN-6010-1 caused some minor regressions in Firefox.

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Releases

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)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 20.04
Ubuntu 18.04

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