imagemagick's libmagick library, under certain circumstances, creates temporary files without taking appropriate security precautions. This vulnerability could be exploited by a local user to create or overwrite files with the privileges of another user who is invoking a program using this library.
For the stable distribution (woody) this problem has been fixed in version 4:220.127.116.11-1woody1.
For the unstable distribution (sid) this problem has been fixed in version 4:5.5.7-1.
We recommend that you update your imagemagick package.
MD5 checksums of the listed files are available in the original advisory.