Qt: Buffer overflow in the included zlib library

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200509-18 / qt
Release Date	September 26, 2005
Latest Revision	September 26, 2005: 02
Impact	normal
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
x11-libs/qt	< 3.3.4-r8	>= 3.3.4-r8	All supported architectures

Related bugreports: #105695

Synopsis

Qt is vulnerable to a buffer overflow which could potentially lead to the execution of arbitrary code.

2. Impact Information

Background

Qt is a cross-platform GUI toolkit used by KDE.

Description

Qt links to a bundled vulnerable version of zlib when emerged with the zlib USE-flag disabled. This may lead to a buffer overflow.

Impact

By creating a specially crafted compressed data stream, attackers can overwrite data structures for applications that use Qt, resulting in a Denial of Service or potentially arbitrary code execution.

3. Resolution Information

Workaround

Emerge Qt with the zlib USE-flag enabled.

Resolution

All Qt users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-libs/qt-3.3.4-r8"

4. References

Page updated September 26, 2005

Summary: This is a Gentoo Linux Security Advisory

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