4.3 - USN-1723-1

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:
http://www.ubuntu.com/usn/usn-1723-1
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