Several security issues were fixed in Firefox.
A use-after-free was discovered in service workers. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via program crash, or execute arbitrary code. (CVE-2016-5287)
27 October 2016
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in Firefox.
A use-after-free was discovered in service workers. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via program crash, or execute arbitrary code. (CVE-2016-5287)
It was discovered that web content could access information in the HTTP cache in some circumstances. An attacker could potentially exploit this to obtain sensitive information. (CVE-2016-5288)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Firefox to make all the necessary changes.
Vulmon