Ubuntu 11.04 USN-1197-1 Moderate: Firefox Cert Authority Issue

ubuntu

September 1, 2011

A certificate authority issued fraudulent certificates.

Summary

A certificate authority issued fraudulent certificates.

Software Description:

- firefox: Mozilla Open Source web browser

- xulrunner-1.9.2: Mozilla Gecko runtime environment

Details:

It was discovered that Dutch Certificate Authority DigiNotar, had

mis-issued multiple fraudulent certificates. These certificates could allow

an attacker to perform a "man in the middle" (MITM) attack which would make

the user believe their connection is secure, but is actually being

monitored.

For the protection of its users, Mozilla has removed the DigiNotar

certificate. Sites using certificates issued by DigiNotar will need to seek

another certificate vendor.

We are currently aware of a regression that blocks one of two Staat der

Nederlanden root certificates which are believed to still be secure. This

regression is being tracked at https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/838322.

Topics Covered

security advisory update firefox ubuntu xulrunner man in the middle certificate issue

Update Instructions

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

Ubuntu 11.04:
  firefox                         6.0.1+build1+nobinonly-0ubuntu0.11.04.1

Ubuntu 10.10:
  firefox                         3.6.21+build1+nobinonly-0ubuntu0.10.10.1
  xulrunner-1.9.2                 1.9.2.21+build1+nobinonly-0ubuntu0.10.10.1

Ubuntu 10.04 LTS:
  firefox                         3.6.21+build1+nobinonly-0ubuntu0.10.04.1
  xulrunner-1.9.2                 1.9.2.21+build1+nobinonly-0ubuntu0.10.04.1

After a standard system upgrade you need to restart Firefox and any
applications that use Xulrunner to effect the necessary changes.