libwmf: Buffer overflow vulnerability

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.

Workaround

There is no known workaround for this issue.

Resolution

All libwmf users should upgrade to the latest version:

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