USN-3111-1: Firefox vulnerabilities

Releases

• Ubuntu 16.10
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM
• Ubuntu 12.04

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)

Update instructions

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

Ubuntu 16.10

• firefox - 49.0.2+build2-0ubuntu0.16.10.2

Ubuntu 16.04

• firefox - 49.0.2+build2-0ubuntu0.16.04.2

Ubuntu 14.04

• firefox - 49.0.2+build2-0ubuntu0.14.04.1

Ubuntu 12.04

• firefox - 49.0.2+build2-0ubuntu0.12.04.1

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

References

• CVE-2016-5287
• CVE-2016-5288