=========================================================================Ubuntu Security Notice USN-5880-2
March 01, 2023

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

USN-5880-1 caused some minor regressions in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

USN-5880-1 fixed vulnerabilities in Firefox. The update introduced
several minor regressions. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 Christian Holler discovered that Firefox did not properly manage memory
 when using PKCS 12 Safe Bag attributes. An attacker could construct a
 PKCS 12 cert bundle in such a way that could allow for arbitrary memory
 writes. (CVE-2023-0767)
 
 Johan Carlsson discovered that Firefox did not properly manage child
 iframe's unredacted URI when using Content-Security-Policy-Report-Only
 header. An attacker could potentially exploits this to obtain sensitive
 information. (CVE-2023-25728)
 
 Vitor Torres discovered that Firefox did not properly manage permissions
 of extensions interaction via ExpandedPrincipals. An attacker could
 potentially exploits this issue to download malicious files or execute
 arbitrary code. (CVE-2023-25729)
 
 Irvan Kurniawan discovered that Firefox did not properly validate
 background script invoking requestFullscreen. An attacker could
 potentially exploit this issue to perform spoofing attacks. (CVE-2023-25730)
 
 Ronald Crane discovered that Firefox did not properly manage memory when
 using EncodeInputStream in xpcom. An attacker could potentially exploits
 this issue to cause a denial of service. (CVE-2023-25732)
 
 Samuel Grob discovered that Firefox did not properly manage memory when
 using wrappers wrapping a scripted proxy. An attacker could potentially
 exploits this issue to cause a denial of service. (CVE-2023-25735)
 
 Holger Fuhrmannek discovered that Firefox did not properly manage memory
 when using Module load requests. An attacker could potentially exploits
 this issue to cause a denial of service. (CVE-2023-25739)
 
 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-2023-25731,
 CVE-2023-25733, CVE-2023-25736, CVE-2023-25737, CVE-2023-25741,
 CVE-2023-25742, CVE-2023-25744, CVE-2023-25745)

Update instructions:

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

Ubuntu 20.04 LTS:
  firefox                         110.0.1+build2-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  firefox                         110.0.1+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-5880-2
  https://ubuntu.com/security/notices/USN-5880-1
  https://launchpad.net/bugs/2008861

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/110.0.1+build2-0ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/firefox/110.0.1+build2-0ubuntu0.18.04.1