Qt: Buffer overflow

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200710-28 / qt
Release Date	October 25, 2007
Latest Revision	October 25, 2007: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
x11-libs/qt	< 3.3.8-r4	>= 3.3.8-r4	All supported architectures

Related bugreports: #192472

Synopsis

An off-by-one vulnerability has been discovered in Qt, possibly resulting in the execution of arbitrary code.

2. Impact Information

Background

Qt is a cross-platform GUI framework, which is used e.g. by KDE.

Description

Dirk Mueller from the KDE development team discovered a boundary error in file qutfcodec.cpp when processing Unicode strings.

Impact

A remote attacker could send a specially crafted Unicode string to a vulnerable Qt application, possibly resulting in the remote execution of arbitrary code with the privileges of the user running the application. Note that the boundary error is present but reported to be not exploitable in 4.x series.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Qt 3.x users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-libs/qt-3.3.8-r4"

4. References

CVE-2007-4137

Page updated October 25, 2007

Summary: This is a Gentoo Linux Security Advisory

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