Debian: CVE-2017-17518: whitedune -- security update

swt/motif/browser.c in White_dune (aka whitedune) 0.30.10 does not validate strings before launching the program specified by the BROWSER environment variable, which might allow remote attackers to conduct argument-injection attacks via a crafted URL. NOTE: This issue is being disputed as not being a vulnerability because “the current version of white_dune (1.369 at https://wdune.ourproject.org/) do not use a "BROWSER environment variable". Instead, the "browser" variable is read from the $HOME/.dunerc file (or from the M$Windows registry). It is configurable in the "options" menu. The default is chosen in the ./configure script, which tests various programs, first tested is "xdg-open".