Ubuntu alert USN-4926-1 (firefox)
| From: | Chris Coulson <chris.coulson@canonical.com> | |
| To: | ubuntu-security-announce@lists.ubuntu.com | |
| Subject: | [USN-4926-1] Firefox vulnerabilities | |
| Date: | Mon, 26 Apr 2021 11:55:19 +0100 | |
| Message-ID: | <c47e8c71-9a2f-4205-3855-9646aaf145db@canonical.com> |
========================================================================== Ubuntu Security Notice USN-4926-1 April 26, 2021 firefox vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: Firefox could be made to crash or run programs as your login if it opened a malicious website. 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, spoof the browser UI, bypass security restrictions, trick the user into disclosing confidential information, or execute arbitrary code. (CVE-2021-23994, CVE-2021-23996, CVE-2021-23997, CVE-2021-23998, CVE-2021-23999, CVE-2021-24000, CVE-2021-24001, CVE-2021-29945, CVE-2021-29946, CVE-2021-29947) A use-after-free was discovered when Responsive Design Mode was enabled. If a user were tricked into opening a specially crafted website with Responsive Design Mode enabled, an attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2021-23995) It was discovered that Firefox mishandled ftp URLs with encoded newline characters. If a user were tricked into clicking on a specially crafted link, an attacker could potentially exploit this to send arbitrary FTP commands. (CVE-2021-24002) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04: firefox 88.0+build2-0ubuntu0.21.04.1 Ubuntu 20.10: firefox 88.0+build2-0ubuntu0.20.10.1 Ubuntu 20.04 LTS: firefox 88.0+build2-0ubuntu0.20.04.1 Ubuntu 18.04 LTS: firefox 88.0+build2-0ubuntu0.18.04.2 Ubuntu 16.04 LTS: firefox 88.0+build2-0ubuntu0.16.04.1 After a standard system update you need to restart Firefox to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-4926-1 CVE-2021-23994, CVE-2021-23995, CVE-2021-23996, CVE-2021-23997, CVE-2021-23998, CVE-2021-23999, CVE-2021-24000, CVE-2021-24001, CVE-2021-24002, CVE-2021-29945, CVE-2021-29946, CVE-2021-29947 Package Information: https://launchpad.net/ubuntu/+source/firefox/88.0+build2-... https://launchpad.net/ubuntu/+source/firefox/88.0+build2-... https://launchpad.net/ubuntu/+source/firefox/88.0+build2-... https://launchpad.net/ubuntu/+source/firefox/88.0+build2-... https://launchpad.net/ubuntu/+source/firefox/88.0+build2-... -- ubuntu-security-announce mailing list ubuntu-security-announce@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security...