1. Ubuntu Security Notices
  2. USN-3111-1

USN-3111-1: Firefox vulnerabilities

Publication date

27 October 2016

Overview

Several security issues were fixed in Firefox.

Releases

Packages

  • firefox - Mozilla Open Source web browser

Details

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)

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)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
16.10 yakkety firefox –  49.0.2+build2-0ubuntu0.16.10.2
16.04 xenial firefox –  49.0.2+build2-0ubuntu0.16.04.2
14.04 trusty firefox –  49.0.2+build2-0ubuntu0.14.04.1
12.04 precise firefox –  49.0.2+build2-0ubuntu0.12.04.1

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References

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