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  • Committer: Teddy Hogeborn
  • Date: 2014-06-08 03:10:08 UTC
  • Revision ID: teddy@recompile.se-20140608031008-mc9bd7b024a3q0y0
Address a very theoretical possible security issue in mandos-client.

If there were to run some sort of "cleaner" process for /run/tmp (or
/tmp), and mandos-client were to run for long enough for that cleaner
process to remove the temporary directory for GPGME, there was a
possibility that another unprivileged process could trick the (also
unprivileged) mandos-client process to remove other files or symlinks
which the unprivileged mandos-client process was allowed to remove.
This is not currently known to have been exploitable, since there are
no known initramfs environments running such cleaner processes.

* plugins.d/mandos-client.c (main): Use O_NOFOLLOW when opening
                                    tempdir for cleaning.

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debian/mandos.prerm
 
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#!/bin/sh
 
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# prerm script for mandos
 
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#
 
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# see: dh_installdeb(1)
 
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set -e
 
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# summary of how this script can be called:
 
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#        * <prerm> 'remove'
 
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#        * <old-prerm> 'upgrade' <new-version>
 
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#        * <new-prerm> 'failed-upgrade' <old-version>
 
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#        * <conflictor's-prerm> 'remove' 'in-favour' <package> <new-version>
 
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#        * <deconfigured's-prerm> 'deconfigure' 'in-favour'
 
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#          <package-being-installed> <version> 'removing'
 
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#          <conflicting-package> <version>
 
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# for details, see /usr/share/doc/packaging-manual/
 
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case "$1" in
 
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    remove|deconfigure)
 
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        if [ -x /etc/init.d/mandos ]; then
 
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                if [ -x /usr/sbin/invoke-rc.d ]; then
 
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                        invoke-rc.d mandos stop
 
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                else
 
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                        /etc/init.d/mandos stop
 
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                fi
 
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        fi
 
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        ;;
 
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    upgrade|failed-upgrade)
 
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        ;;
 
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    *)
 
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        echo "prerm called with unknown argument '$1'" >&2
 
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        exit 0
 
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    ;;
 
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esac
 
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#DEBHELPER#
 
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exit 0