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Ubuntu Security Notice USN-7334-1
March 06, 2025

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-2025-1933,
CVE-2025-1934, CVE-2025-1935, CVE-2025-1936, CVE-2025-1937, CVE-2025-1942)

It was discovered that Firefox did not properly handle WebTransport
connection, leading to a use-after-free vulnerability. An attacker could
potentially exploit this issue to cause a denial of service.
(CVE-2025-1931)

Ivan Fratric discovered that Firefox did not properly handle XSLT sorting,
leading to a out-of-bounds access vulnerability. An attacker could
potentially exploit this issue to cause a denial of service, or execute
arbitrary code. (CVE-2025-1932)

Update instructions:

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

Ubuntu 20.04 LTS
  firefox                         136.0+build3-0ubuntu0.20.04.1

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

References:
  https://ubuntu.com/security/notices/USN-7334-1
  CVE-2025-1931, CVE-2025-1932, CVE-2025-1933, CVE-2025-1934,
  CVE-2025-1935, CVE-2025-1936, CVE-2025-1937, CVE-2025-1942

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/136.0+build3-0ubuntu0.20.04.1