Tim Brown from Nth Dimention reports:
I recently discovered that the Ark archiving tool is vulnerable
to directory traversal via malformed. When attempts are made to
view files within the malformed Zip file in Ark's default view,
the wrong file may be displayed due to incorrect construction of
the temporary file name. Whilst this does not allow the wrong
file to be overwritten, after closing the default view, Ark will
then attempt to delete the temporary file which could result in
the deletion of the incorrect file.