Ubuntu 11.04: USN-1197-6 High Severity: Qt Certificate Authority Issue

ubuntu

September 22, 2011

A certificate authority mis-issued fraudulent certificates.

Summary

A certificate authority mis-issued fraudulent certificates.

Software Description:

- qt4-x11: Qt 4 libraries and support modules

Details:

USN-1197-1 and USN-1197-3 addressed an issue in Firefox and Xulrunner

pertaining to the Dutch Certificate Authority DigiNotar mis-issuing

fraudulent certificates. This update provides an update

for Qt that blacklists the known fraudulent certificates.

Original advisory details:

USN-1197-1

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 ...

Read the Full Advisory

Topics Covered

security advisory high severity ubuntu qt fraud certificate authority man in the middle

Update Instructions

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

Ubuntu 11.04:
  libqt4-network                  4:4.7.2-0ubuntu6.3

Ubuntu 10.10:
  libqt4-network                  4:4.7.0-0ubuntu4.4

Ubuntu 10.04 LTS:
  libqt4-network                  4:4.6.2-0ubuntu5.3

After a standard system upgrade you need to restart your session to effect
the necessary changes.