USN-6710-2: Firefox regressions

4 April 2024

USN-6710-1 caused some minor regressions in Firefox.

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Releases

Packages

  • firefox - Mozilla Open Source web browser

Details

USN-6710-1 fixed vulnerabilities in Firefox. The update introduced
several minor regressions. This update fixes the problem.

Original advisory details:

Manfred Paul discovered that Firefox did not properly perform bounds
checking during range analysis, leading to an out-of-bounds write
vulnerability. A attacker could use this to cause a denial of service,
or execute arbitrary code. (CVE-2024-29943)

Manfred Paul discovered that Firefox incorrectly handled MessageManager
listeners under certain circumstances. An attacker who was able to inject
an event handler into a privileged object may have been able to execute
arbitrary code. (CVE-2024-29944)

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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.

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Update instructions

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

Ubuntu 20.04

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

References

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