libwmf: Buffer overflow vulnerability

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200608-17 / libwmf
Release Date	August 10, 2006
Latest Revision	August 10, 2006: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-libs/libwmf	< 0.2.8.4	>= 0.2.8.4	All supported architectures

Related bugreports: #139325

Synopsis

libwmf is vulnerable to an integer overflow potentially resulting in the execution of arbitrary code.

2. Impact Information

Background

libwmf is a library for reading and converting vector images in Microsoft's native Windows Metafile Format (WMF).

Description

infamous41md discovered that libwmf fails to do proper bounds checking on the MaxRecordSize variable in the WMF file header. This could lead to an head-based buffer overflow.

Impact

By enticing a user to open a specially crafted WMF file, a remote attacker could cause a heap-based buffer overflow and execute arbitrary code with the permissions of the user running the application that uses libwmf.

3. Resolution Information

Workaround

There is no known workaround for this issue.

Resolution

All libwmf users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

4. References

CVE-2006-3376

Page updated August 10, 2006

Summary: This is a Gentoo Linux Security Advisory

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