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Ubuntu 20.04: USN-6267-3 – Severe Firefox Minor Regressions Resolved

USN-6267-2 caused some minor regressions in Firefox.. ========================================================================== Ubuntu Security Notice USN-6267-3 August 21, 2023 firefox regressions ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS Summary: USN-6267-2 caused some minor regressions in Firefox. Software Description: - firefox: Mozilla Open Source web browser Details: USN-6267-1 fixed vulnerabilities and USN-6267-2 fixed minor regressions in Firefox. The update introduced several minor regressions. This update fixes the problem. We apologize for the inconvenience. Original advisory 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-2023-4047, CVE-2023-4048, CVE-2023-4049, CVE-2023-4051, CVE-2023-4053, CVE-2023-4055, CVE-2023-4056, CVE-2023-4057, CVE-2023-4058) Max Vlasov discovered that Firefox Offscreen Canvas did not properly track cross-origin tainting. An attacker could potentially exploit this issue to access image data from another site in violation of same-origin policy. (CVE-2023-4045) Alexander Guryanov discovered that Firefox did not properly update the value of a global variable in WASM JIT analysis in some circumstances. An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-4046) Mark Brand discovered that Firefox did not properly validate the size of an untrusted input stream. An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-4050) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: firefox 116.0.3+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-6267-3 https://ubuntu.com/security/notices/USN-6267-1 https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/2032143 Package Information: https://launchpad.net/ubuntu/+source/firefox/116.0.3+build2-0ubuntu0.20.04.1 . The latest Ubuntu Security Notice USN-6267-4 addresses slight regressions in Firefox and provides fixes for users on 22.04 LTS.. Ubuntu Security Notice, Firefox Minor Fixes, Security Updates. . Severity: Important. LinuxSecurity.com Team

Aug 21, 2023 •Important Ubuntu