Ubuntu Security Notice USN-857-1

10th November, 2009

qt4-x11 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 9.04
• Ubuntu 8.10

Software description

• qt4-x11

Details

It was discovered that QtWebKit did not properly handle certain SVGPathList
data structures. If a user were tricked into viewing a malicious website,
an attacker could exploit this to execute arbitrary code with the
privileges of the user invoking the program. (CVE-2009-0945)

Several flaws were discovered in the QtWebKit browser and JavaScript
engines. If a user were tricked into viewing a malicious website, a remote
attacker could cause a denial of service or possibly execute arbitrary code
with the privileges of the user invoking the program. (CVE-2009-1687,
CVE-2009-1690, CVE-2009-1698, CVE-2009-1711, CVE-2009-1725)

It was discovered that QtWebKit did not properly handle certain XSL
stylesheets. If a user were tricked into viewing a malicious website,
an attacker could exploit this to read arbitrary local files, and possibly
files from different security zones. (CVE-2009-1699, CVE-2009-1713)

It was discovered that QtWebKit did not prevent the loading of local Java
applets. If a user were tricked into viewing a malicious website, an
attacker could exploit this to execute arbitrary code with the privileges
of the user invoking the program. (CVE-2009-1712)

Update instructions

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

Ubuntu 9.04:

libqt4-webkit 4.5.0-0ubuntu4.3

Ubuntu 8.10:

libqt4-webkit 4.4.3-0ubuntu1.4

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2009-0945, CVE-2009-1687, CVE-2009-1690, CVE-2009-1698, CVE-2009-1699, CVE-2009-1711, CVE-2009-1712, CVE-2009-1713, CVE-2009-1725