Ubuntu Security Notice USN-1197-3
September 07, 2011
firefox, xulrunner-1.9.2 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
A certificate authority issued fraudulent certificates.
- firefox: Mozilla Open Source web browser
- xulrunner-1.9.2: Mozilla Gecko runtime environment
USN-1197-1 partially addressed an issue with Dutch Certificate Authority
DigiNotar mis-issuing fraudulent certificates. This update actively
distrusts the DigiNotar root certificate as well as several intermediary
certificates. Also included in this list of distrusted certificates are the
Staat der Nederlanden root certificates.
Original advisory 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
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://launchpad.net/bugs/838322.
The problem can be corrected by updating your system to the following
Ubuntu 10.04 LTS:
After a standard system upgrade you need to restart Firefox and any
applications that use Xulrunner to effect the necessary changes.