Synopsis

Moderate: qt4 security update

Type/Severity

Security Advisory: Moderate

Topic

Updated qt4 packages that fix two security issues are now available for Red
Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

Description

Qt 4 is a software toolkit that simplifies the task of writing and
maintaining GUI (Graphical User Interface) applications for the X Window
System. HarfBuzz is an OpenType text shaping engine.

A flaw in the way Qt 4 expanded certain UTF-8 characters could be used to
prevent a Qt 4 based application from properly sanitizing user input.
Depending on the application, this could allow an attacker to perform
directory traversal, or for web applications, a cross-site scripting (XSS)
attack. (CVE-2007-0242)

A buffer overflow flaw was found in the harfbuzz module in Qt 4. If a user
loaded a specially-crafted font file with an application linked against Qt
4, it could cause the application to crash or, possibly, execute arbitrary
code with the privileges of the user running the application.
(CVE-2011-3193)

Users of Qt 4 should upgrade to these updated packages, which contain
backported patches to correct these issues. All running applications linked
against Qt 4 libraries must be restarted for this update to take effect.

Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 234633 - CVE-2007-0242 QT UTF8 improper character expansion
• BZ - 733118 - CVE-2011-3193 qt/harfbuzz buffer overflow

CVEs

• CVE-2007-0242
• CVE-2011-3193

References