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From: Evan Caville <evan.caville@canonical.com>
Reply-To: Ubuntu Security <security@ubuntu.com>
To: ubuntu-security-announce@lists.ubuntu.com
Message-ID: <83b949b2-a095-4507-903a-93e73d61b9f5@canonical.com>
Subject: [USN-7191-1] Firefox vulnerabilities
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==========================================================================
Ubuntu Security Notice USN-7191-1
January 09, 2025
firefox vulnerabilities
==========================================================================
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-2025-0237,
CVE-2025-0239, CVE-2025-0240, CVE-2025-0242, CVE-2025-0243, CVE-2025-0247)
Irvan Kurniawan discovered that Firefox incorrectly handled memory when
breaking lines in text, leading to a use-after-free vulnerability. An
attacker could possibly use this issue to cause a denial of service or
possibly execute arbitrary code. (CVE-2025-0238)
Nils Bars discovered that Firefox incorrectly handled memory when using
JavaScript Text Segmentation. An attacker could possibly use this issue to
cause a denial of service. (CVE-2025-0241)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS
firefox 134.0+build1-0ubuntu0.20.04.1
After a standard system update you need to restart Firefox to make all the
necessary changes.
References:
https://ubuntu.com/security/notices/USN-7191-1
CVE-2025-0237, CVE-2025-0238, CVE-2025-0239, CVE-2025-0240,
CVE-2025-0241, CVE-2025-0242, CVE-2025-0243, CVE-2025-0247
Package Information:
https://launchpad.net/ubuntu/+source/firefox/134.0+build1-0ubuntu0.20.04.1
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