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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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debian/mandos.lintian-overrides
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# This config file will normally have encrypted secret client keys in
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# it, so it must be kept unreadable for non-root users.
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#
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mandos binary: non-standard-file-perm 0600 != 0644 [etc/mandos/clients.conf]
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# The debconf templates is only used for displaying information
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# detected in the postinst, not for saving answers to questions, so we
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# don't need a .config file.
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mandos binary: no-debconf-config
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# The notice displayed from the postinst script really is critical
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mandos binary: postinst-uses-db-input
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# These are very important to work around bugs or changes in the old
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# versions, and there is no pressing need to remove them.
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mandos binary: maintainer-script-supports-ancient-package-version *
 
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mandos binary: non-standard-file-perm etc/mandos/clients.conf 0600 != 0644