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Ubuntu Security Notice USN-6456-1
October 30, 2023
firefox vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
Summary:
Several security issues were fixed in Firefox.
Software Description:
- firefox: Mozilla Open Source web browser
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-2023-5722,
CVE-2023-5724, CVE-2023-5728, CVE-2023-5729, CVE-2023-5730, CVE-2023-5731)
Kelsey Gilbert discovered that Firefox did not properly manage certain
browser prompts and dialogs due to an insufficient activation-delay. An
attacker could potentially exploit this issue to perform clickjacking.
(CVE-2023-5721)
Daniel Veditz discovered that Firefox did not properly validate a cookie
containing invalid characters. An attacker could potentially exploit this
issue to cause a denial of service. (CVE-2023-5723)
Shaheen Fazim discovered that Firefox did not properly validate the URLs
open by installed WebExtension. An attacker could potentially exploit this
issue to obtain sensitive information. (CVE-2023-5725)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS:
  firefox                         119.0+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-6456-1
  CVE-2023-5721, CVE-2023-5722, CVE-2023-5723, CVE-2023-5724,
  CVE-2023-5725, CVE-2023-5728, CVE-2023-5729, CVE-2023-5730,
  CVE-2023-5731
Package Information:
  https://launchpad.net/ubuntu/+source/firefox/119.0+build2-0ubuntu0.20.04.1