/mandos/release

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  • Committer: Teddy Hogeborn
  • Date: 2014-06-08 03:10:08 UTC
  • mto: (237.7.272 trunk)
  • mto: This revision was merged to the branch mainline in revision 317.
  • 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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<!DOCTYPE busconfig PUBLIC
 
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 "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
 
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 "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
 
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<busconfig>
 
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  <policy group="_mandos">
 
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    <allow own="se.bsnet.fukt.Mandos"/>
 
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    <allow send_destination="se.bsnet.fukt.Mandos"/>
 
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    <allow receive_sender="se.bsnet.fukt.Mandos"/>
 
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    <allow own="se.recompile.Mandos"/>
 
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    <allow send_destination="se.recompile.Mandos"/>
 
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    <allow receive_sender="se.recompile.Mandos"/>
 
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  </policy>
 
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  <policy user="root">
 
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    <allow own="se.bsnet.fukt.Mandos"/>
 
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    <allow send_destination="se.bsnet.fukt.Mandos"/>
 
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    <allow receive_sender="se.bsnet.fukt.Mandos"/>
 
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    <allow own="se.recompile.Mandos"/>
 
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    <allow send_destination="se.recompile.Mandos"/>
 
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    <allow receive_sender="se.recompile.Mandos"/>
 
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  </policy>
 
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</busconfig>