libwmf: User-assisted execution of arbitrary code

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Updated July 02, 2009

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200907-01 / libwmf
Release Date July 02, 2009
Latest Revision July 02, 2009: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
media-libs/libwmf < 0.2.8.4-r3 >= 0.2.8.4-r3 All supported architectures

Related bugreports: #268161

Synopsis

libwmf bundles an old GD version which contains a "use-after-free" vulnerability.

2.  Impact Information

Background

libwmf is a library for converting WMF files.

Description

The embedded fork of the GD library introduced a "use-after-free" vulnerability in a modification which is specific to libwmf.

Impact

A remote attacker could entice a user to open a specially crafted WMF file, possibly resulting in the execution of arbitrary code with the privileges of the user running the application, or a Denial of Service.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All libwmf users should upgrade to the latest version which no longer builds the GD library:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/libwmf-0.2.8.4-r3"

4.  References