Ubuntu Security Notice 6010-3 - USN-6010-1 fixed vulnerabilities and USN-6010-2 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. Irvan Kurniawan discovered that Firefox did not properly manage fullscreen notifications using a combination of window.open, fullscreen requests, window.name assignments, and setInterval calls. An attacker could potentially exploit this issue to perform spoofing attacks. Lukas Bernhard discovered that Firefox did not properly manage memory when doing Garbage Collector compaction. An attacker could potentially exploits this issue to cause a denial of service. Zx from qriousec discovered that Firefox did not properly validate the address to free a pointer provided to the memory manager. An attacker could potentially exploits this issue to cause a denial of service. Alexis aka zoracon discovered that Firefox did not properly validate the URI received by the WebExtension during a load request. An attacker could potentially exploits this to obtain sensitive information. Trung Pham discovered that Firefox did not properly validate the filename directive in the Content-Disposition header. An attacker could possibly exploit this to perform reflected file download attacks potentially tricking users to install malware. Ameen Basha M K discovered that Firefox did not properly validate downloads of files ending in .desktop. An attacker could potentially exploits this issue to execute arbitrary code.
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