========================================================================== 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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