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Ubuntu Security Notice USN-6404-2
October 11, 2023

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

- Ubuntu 20.04 LTS

Summary:

USN-6404-1 caused some minor regressions in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

USN-6404-1 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-2023-5169,
 CVE-2023-5170, CVE-2023-5171, CVE-2023-5172, CVE-2023-5175, CVE-2023-5176)
 
 Ronald Crane discovered that Firefox did not properly manage memory when
 non-HTTPS Alternate Services (network.http.altsvc.oe) is enabled. An
 attacker could potentially exploit this issue to cause a denial of service.
 (CVE-2023-5173)
 
 Clément Lecigne discovered that Firefox did not properly manage memory when
 handling VP8 media stream. An attacker-controlled VP8 media stream could
 lead to a heap buffer overflow in the content process, resulting in a
 denial of service, or possibly execute arbitrary code. (CVE-2023-5217)

Update instructions:

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

Ubuntu 20.04 LTS:
  firefox                         118.0.2+build2-0ubuntu0.20.04.1

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

References:
  https://ubuntu.com/security/notices/USN-6404-2
  https://ubuntu.com/security/notices/USN-6404-1
  https://launchpad.net/bugs/2038977

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/118.0.2+build2-0ubuntu0.20.04.1