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security fix for 'm4 -F'


From: Eric Blake
Subject: security fix for 'm4 -F'
Date: Thu, 22 Nov 2007 07:39:00 -0700
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071031 Thunderbird/2.0.0.9 Mnenhy/0.7.5.666

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Hash: SHA1

$ m4 -F /nosuch/%x </dev/null
m4: /nosuch/0: No such file or directory

If that doesn't scare you, consider a file name that contains %n.  This
security hole has been present since M4 1.3.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

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