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[bug #55557] gropdf can execute arbitrary commands

From: Colin Watson
Subject: [bug #55557] gropdf can execute arbitrary commands
Date: Thu, 24 Jan 2019 11:12:38 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:64.0) Gecko/20100101 Firefox/64.0

Follow-up Comment #2, bug #55557 (project groff):

I think all the approaches involving careful @ARGV mangling are far too
delicate and it's too hard to be certain that they're correct.  My preference
would be to avoid <> entirely and use three-argument open, as in the attached


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