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Ubuntu Security Notice USN-6143-3

Ubuntu Security Notice 6143-3 - USN-6143-1 fixed vulnerabilities and USN-6143-2 fixed minor regressions in Firefox. The update introduced several minor regressions. This update fixes the problem. 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. Jun Kokatsu discovered that Firefox did not properly validate site-isolated process for a document loaded from a data: URL that was the result of a redirect, leading to an open redirect attack. An attacker could possibly use this issue to perform phishing attacks.

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==========================================================================Ubuntu Security Notice USN-6143-3June 21, 2023firefox regressions==========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 20.04 LTSSummary:USN-6143-2 caused some minor regressions in Firefox.Software Description:- firefox: Mozilla Open Source web browserDetails:USN-6143-1 fixed vulnerabilities and USN-6143-2 fixed minor regressions inFirefox. The update introduced several minor regressions. This update fixesthe 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-2023-34414, CVE-2023-34416, CVE-2023-34417)  Jun Kokatsu discovered that Firefox did not properly validate site-isolated process for a document loaded from a data: URL that was the result of a redirect, leading to an open redirect attack. An attacker could possibly use this issue to perform phishing attacks. (CVE-2023-34415)Update instructions:The problem can be corrected by updating your system to the followingpackage versions:Ubuntu 20.04 LTS:  firefox                         114.0.2+build1-0ubuntu0.20.04.1After a standard system update you need to restart Firefox to make all thenecessary changes.References:  https://ubuntu.com/security/notices/USN-6143-3  https://ubuntu.com/security/notices/USN-6143-1  https://launchpad.net/bugs/2024513Package Information:  https://launchpad.net/ubuntu/+source/firefox/114.0.2+build1-0ubuntu0.20.04.1

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When choosing a site-isolated process for a document loaded from a data: URL that was the result of a redirect, Firefox would load that document in the same process as the site that issued the redirect. This bypassed the site-isolation protections against Spectre-like attacks on sites that host an "open redirect". Firefox no longer follows HTTP redirects to data: URLs. This vulnerability affects Firefox < 114.

CVE-2023-34415: Security Vulnerabilities fixed in Firefox 114

When choosing a site-isolated process for a document loaded from a data: URL that was the result of a redirect, Firefox would load that document in the same process as the site that issued the redirect. This bypassed the site-isolation protections against Spectre-like attacks on sites that host an "open redirect". Firefox no longer follows HTTP redirects to data: URLs. This vulnerability affects Firefox < 114.

CVE-2023-34417: Bug List

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CVE-2023-34416: Security Vulnerabilities fixed in Thunderbird 102.12

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Ubuntu Security Notice USN-6143-1

Ubuntu Security Notice 6143-1 - 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. Jun Kokatsu discovered that Firefox did not properly validate site-isolated process for a document loaded from a data: URL that was the result of a redirect, leading to an open redirect attack. An attacker could possibly use this issue to perform phishing attacks.

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