Tavis Ormandy discovered that the embedded GD library copy in libwmf, a library to parse windows metafiles , makes use of a pointer after it was already freed. An attacker using a crafted WMF file can cause a denial of service or possibly the execute arbitrary code via applications using this library. For the oldstable distribution , this problem has been fixed in version 0.2.8.4-2+etch1. For the stable distribution , this problem has been fixed in version 0.2.8.4-6+lenny1. For the testing distribution , this problem will be fixed soon. For the unstable distribution , this problem has been fixed in version 0.2.8.4-6.1. We recommend that you upgrade your libwmf packages.