=========================================================================Ubuntu Security Notice USN-1504-1
July 11, 2012
qt4-x11 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
- Ubuntu 10.04 LTS
Summary:
Qt Applications could be made to crash or run programs as your login if
they opened specially crafted files.
Software Description:
- qt4-x11: transitional package for Qt 4 assistant module
Details:
It was discovered that Qt did not properly handle wildcard domain names or
IP addresses in the Common Name field of X.509 certificates. An attacker
could exploit this to perform a man in the middle attack to view sensitive
information or alter encrypted communications. This issue only affected
Ubuntu 10.04 LTS. (CVE-2010-5076)
A heap-based buffer overflow was discovered in the HarfBuzz module. If a
user were tricked into opening a crafted font file in a Qt application,
an attacker could cause a denial of service or possibly execute arbitrary
code with the privileges of the user invoking the program. (CVE-2011-3193)
It was discovered that Qt did not properly handle greyscale TIFF images.
If a Qt application could be made to process a crafted TIFF file, an
attacker could cause a denial of service. (CVE-2011-3194)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.04:
libqt4-network 4:4.7.2-0ubuntu6.4
libqtgui4 4:4.7.2-0ubuntu6.4
Ubuntu 10.04 LTS:
libqt4-network 4:4.6.2-0ubuntu5.4
libqtgui4 4:4.6.2-0ubuntu5.4
After a standard system update you need to restart your session to make all
the necessary changes.
References:
https://ubuntu.com/security/notices/USN-1504-1
CVE-2010-5076, CVE-2011-3193, CVE-2011-3194
Package Information:
https://launchpad.net/ubuntu/+source/qt4-x11/4:4.7.2-0ubuntu6.4
https://launchpad.net/ubuntu/+source/qt4-x11/4:4.6.2-0ubuntu5.4
