=========================================================================Ubuntu Security Notice USN-1723-1
February 14, 2013

qt4-x11 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in Qt.

Software Description:
- qt4-x11: Qt 4 libraries

Details:

Richard J. Moore and Peter Hartmann discovered that Qt allowed redirecting
requests from http to file schemes. If an attacker were able to perform a
man-in-the-middle attack, this flaw could be exploited to view sensitive
information. This issue only affected Ubuntu 11.10, Ubuntu 12.04 LTS,
and Ubuntu 12.10. (CVE-2012-5624)

Stephen Cheng discovered that Qt may report incorrect errors when ssl
certificate verification fails. (CVE-2012-6093)

Tim Brown and Mark Lowe discovered that Qt incorrectly used weak
permissions on shared memory segments. A local attacker could use this
issue to view sensitive information, or modify program data belonging to
other users. (CVE-2013-0254)

Update instructions:

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

Ubuntu 12.10:
  libqt4-core                     4:4.8.3+dfsg-0ubuntu3.1
  libqt4-network                  4:4.8.3+dfsg-0ubuntu3.1

Ubuntu 12.04 LTS:
  libqt4-core                     4:4.8.1-0ubuntu4.4
  libqt4-network                  4:4.8.1-0ubuntu4.4

Ubuntu 11.10:
  libqt4-core                     4:4.7.4-0ubuntu8.3
  libqt4-network                  4:4.7.4-0ubuntu8.3

Ubuntu 10.04 LTS:
  libqt4-core                     4:4.6.2-0ubuntu5.6
  libqt4-network                  4:4.6.2-0ubuntu5.6

After a standard system update you need to restart your session to make all
the necessary changes.

References:
  
  CVE-2012-5624, CVE-2012-6093, CVE-2013-0254

Package Information:
  https://launchpad.net/ubuntu/+source/qt4-x11/4:4.8.3+dfsg-0ubuntu3.1
  https://launchpad.net/ubuntu/+source/qt4-x11/4:4.8.1-0ubuntu4.4
  https://launchpad.net/ubuntu/+source/qt4-x11/4:4.7.4-0ubuntu8.3
  https://launchpad.net/ubuntu/+source/qt4-x11/4:4.6.2-0ubuntu5.6