N/A - USN-4054-1

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04 - Ubuntu 18.10 - 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:

A sandbox escape was discovered in Firefox. If a user were tricked in to installing a malicious language pack, an attacker could exploit this to gain additional privileges. (CVE-2019-9811)

Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass same origin restrictions, conduct cross-site scripting (XSS) attacks, conduct cross-site request forgery (CSRF) attacks, spoof origin attributes, spoof the addressbar contents, bypass safebrowsing protections, or execute arbitrary code. (CVE-2019-11709, CVE-2019-11710, CVE-2019-11711, CVE-2019-11712, CVE-2019-11713, CVE-2019-11714, CVE-2019-11715, CVE-2019-11716, CVE-2019-11717, CVE-2019-11718, CVE-2019-11719, CVE-2019-11720, CVE-2019-11721, CVE-2019-11723, CVE-2019-11724, CVE-2019-11725, CVE-2019-11727, CVE-2019-11728, CVE-2019-11729)

It was discovered that Firefox treats all files in a directory as same origin. If a user were tricked in to downloading a specially crafted HTML file, an attacker could potentially exploit this to obtain sensitive information from local files. (CVE-2019-11730)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 19.04:  firefox                        68.0+build3-0ubuntu0.19.04.1

Ubuntu 18.10:  firefox                        68.0+build3-0ubuntu0.18.10.1

Ubuntu 18.04 LTS:  firefox                        68.0+build3-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:  firefox                        68.0+build3-0ubuntu0.16.04.1

After a standard system update you need to restart Firefox to make all the necessary changes.

References:  https://usn.ubuntu.com/4054-1  CVE-2019-11709, CVE-2019-11710, CVE-2019-11711, CVE-2019-11712,  CVE-2019-11713, CVE-2019-11714, CVE-2019-11715, CVE-2019-11716,  CVE-2019-11717, CVE-2019-11718, CVE-2019-11719, CVE-2019-11720,  CVE-2019-11721, CVE-2019-11723, CVE-2019-11724, CVE-2019-11725,  CVE-2019-11727, CVE-2019-11728, CVE-2019-11729, CVE-2019-11730,  CVE-2019-9811

Package Information:  https://launchpad.net/ubuntu/+source/firefox/68.0+build3-0ubuntu0.19.04.1  https://launchpad.net/ubuntu/+source/firefox/68.0+build3-0ubuntu0.18.10.1  https://launchpad.net/ubuntu/+source/firefox/68.0+build3-0ubuntu0.18.04.1  https://launchpad.net/ubuntu/+source/firefox/68.0+build3-0ubuntu0.16.04.1