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Ubuntu: Security update for Qt

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. Stephen Cheng discovered that Qt may report incorrect errors when ssl certificate verification fails. 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.

Updated packages are available from security.ubuntu.com.

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:
 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
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