libwmf: User-assisted execution of arbitrary code

1. Gentoo Linux Security Advisory

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

CVE-2009-1364

Page updated July 02, 2009

Summary: This is a Gentoo Linux Security Advisory

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