USN-2893-1: Firefox vulnerability

Ubuntu Security Notice USN-2893-1

11th February, 2016

firefox vulnerability

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

  • Ubuntu 15.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

Summary

A same-origin-policy bypass was discovered in Firefox.

Software description

  • firefox
    – Mozilla Open Source web browser

Details

Jason Pang discovered that service workers intercept responses to plugin
network requests made through the browser. An attacker could potentially
exploit this to bypass same origin restrictions using the Flash plugin.
(CVE-2016-1949)

Update instructions

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

Ubuntu 15.10:
firefox

44.0.2+build1-0ubuntu0.15.10.1
Ubuntu 14.04 LTS:
firefox

44.0.2+build1-0ubuntu0.14.04.1
Ubuntu 12.04 LTS:
firefox

44.0.2+build1-0ubuntu0.12.04.1

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.

References

CVE-2016-1949

Source: ubuntu-usn

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