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The 'data_filter' is far too restrictive, this filter doesn't apply any
mode bits to directories which in turn will result in unexpected
directory permissions of the amongst others msg.[ls]ock directories.
With 'data_filter' and a 'patched' python at best we experience
CI failures with samba-ad-back1 & samba-ad-back2 CI jobs due to server
startup failures, at worst user/admins will need to adjust directory
permissions post backup.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15390
Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This also checks for symlinks and hardlinks.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15390
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
This also checks for symlinks and hardlinks.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15390
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
It should be available for Python >= 3.11.4 but also has been
backported.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15390
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Python's tarfile module is not very careful about paths that step out
of the target directory. We can be a bit better at little cost.
This was reported in 2007[1], and has recently been publicised [2, for
example].
We were informed of this bug in December 2021 by Luis Alberto López
Alvar, but decided then that there were no circumstances under which
this was a security concern. That is, if you can alter the backup
files, you can already do worse things. But there is a case to guard
against an administrator being tricked into trying to restore a file
that isn't based on a real backup.
[1] https://nvd.nist.gov/vuln/detail/CVE-2007-4559
[2] https://www.theregister.com/2022/09/22/python_vulnerability_tarfile/
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15185
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Oct 4 03:48:43 UTC 2022 on sn-devel-184
