Ubuntu Security Notice USN-1197-5
September 09, 2011
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
A certificate authority mis-issued fraudulent certificates.
- ca-certificates: Common CA certificates
USN-1197-1 addressed an issue in Firefox and Xulrunner pertaining to the
Dutch Certificate Authority DigiNotar mis-issuing fraudulent certificates.
This update provides the corresponding update for ca-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 update you need to restart any application using
ca-certificates to make all the necessary changes.