USN-3391-2: Ubufox update

16 August 2017

ubufox update

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

  • Ubuntu 17.04
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


This update provides compatible packages for Firefox 55.

Software Description

  • ubufox - Ubuntu Firefox specific configuration defaults and apt support


USN-3391-1 fixed vulnerabilities in Firefox. This update provides the corresponding update for Ubufox.

Original advisory details:

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 conduct cross-site scripting (XSS) attacks, bypass sandbox restrictions, obtain sensitive information, spoof the origin of modal alerts, bypass same origin restrictions, read uninitialized memory, cause a denial of service via program crash or hang, or execute arbitrary code. (CVE-2017-7753, CVE-2017-7779, CVE-2017-7780, CVE-2017-7781, CVE-2017-7783, CVE-2017-7784, CVE-2017-7785, CVE-2017-7786, CVE-2017-7787, CVE-2017-7788, CVE-2017-7789, CVE-2017-7791, CVE-2017-7792, CVE-2017-7794, CVE-2017-7797, CVE-2017-7798, CVE-2017-7799, CVE-2017-7800, CVE-2017-7801, CVE-2017-7802, CVE-2017-7803, CVE-2017-7806, CVE-2017-7807, CVE-2017-7808, CVE-2017-7809)

Update instructions

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

Ubuntu 17.04
xul-ext-ubufox - 3.4-0ubuntu0.17.04.1
Ubuntu 16.04 LTS
xul-ext-ubufox - 3.4-0ubuntu0.16.04.1
Ubuntu 14.04 LTS
xul-ext-ubufox - 3.4-0ubuntu0.14.04.1

To update your system, please follow these instructions:

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