USN-6562-2: Firefox regressions
USN-6562-1 fixed vulnerabilities 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-2023-6865, CVE-2023-6857, CVE-2023-6858, CVE-2023-6859, CVE-2023-6866, CVE-2023-6867, CVE-2023-6861, CVE-2023-6869, CVE-2023-6871, CVE-2023-6872, CVE-2023-6863, CVE-2023-6864, CVE-2023-6873) DoHyun Lee discovered that Firefox did not properly manage memory when used on systems with the Mesa VM driver. An attacker could potentially exploit this issue to execute arbitrary code. (CVE-2023-6856) George Pantela and Hubert Kario discovered that Firefox using multiple NSS NIST curves which were susceptible to a side-channel attack known as "Minerva". An attacker could potentially exploit this issue to obtain sensitive information. (CVE-2023-6135) Andrew Osmond discovered that Firefox did not properly validate the textures produced by remote decoders. An attacker could potentially exploit this issue to escape the sandbox. (CVE-2023-6860)
Affected Software
Event History
Frequently Asked Questions
What vulnerabilities does USN-6562-2 address?
USN-6562-2 addresses several security issues discovered in Firefox that were introduced in the previous update USN-6562-1.
How do I apply the fix for USN-6562-2?
To fix USN-6562-2, update your Firefox package to version 121.0.1+build1-0ubuntu0.20.04.1 on Ubuntu 20.04.
What problems were caused by the previous update USN-6562-1?
The previous update USN-6562-1 introduced several minor regressions in Firefox that are corrected by USN-6562-2.
Is it safe to use Firefox after applying the update for USN-6562-2?
Yes, after applying the update for USN-6562-2, Firefox should be secure against the previously identified vulnerabilities.
What should I do if I encounter issues after updating Firefox due to USN-6562-2?
If you encounter issues after updating due to USN-6562-2, consider reporting the problems to Ubuntu's bug tracking.