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https://github.com/churchers/vm-bhyve.git
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9537cb32ed
The "vm" script is responsible for executing shell script functions found in other vm-bhyve scripts. It does this by sourcing other vm-bhyve shell scripts, which automatically execute code that handles the user's input. One of the first actions "vm" takes is to check if the relative file "./lib/vm-core" exists. If this file exists, it sets the parent directory for sourcing scripts to "./lib", resulting in all shell scripts being sourced from a path relative to the user's current working directory. This is unsafe because sourcing from a relative file path may result in execution of untrusted code. For example, imagine the user cloned a git repository that contains malicious code stored at "<git-dir>/lib/". If the user were to "cd" to this imaginary cloned repository and execute the "vm" script, they would inadvertently source and execute code from that directory. This commit removes this behavior. The "vm" script now sources scripts exclusively from "/usr/local/lib/vm-bhyve/".
50 lines
1.8 KiB
Bash
50 lines
1.8 KiB
Bash
#!/bin/sh
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#-------------------------------------------------------------------------+
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# Copyright (C) 2016 Matt Churchyard (churchers@gmail.com)
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# All rights reserved
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted providing that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# get libs
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if [ -e "/usr/local/lib/vm-bhyve" ]; then
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LIB="/usr/local/lib/vm-bhyve"
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else
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echo "unable to locate vm-bhyve libraries"
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exit 1
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fi
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# load libs
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. "${LIB}/vm-cmd"
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. "${LIB}/vm-config"
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. "${LIB}/vm-core"
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. "${LIB}/vm-datastore"
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. "${LIB}/vm-guest"
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. "${LIB}/vm-info"
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. "${LIB}/vm-migration"
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. "${LIB}/vm-rctl"
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. "${LIB}/vm-run"
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. "${LIB}/vm-switch"
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. "${LIB}/vm-util"
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. "${LIB}/vm-zfs"
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. "${LIB}/vm-base"
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