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| author | Topi Miettinen <toiwoton@gmail.com> | 2019-05-10 22:11:40 +0300 |
|---|---|---|
| committer | Tomáš Mráz <t8m@users.noreply.github.com> | 2020-02-18 13:18:16 +0100 |
| commit | 59812d1cf1127a1af65b530addff76be767092b1 (patch) | |
| tree | c05252f35d58f485d13af5988cd340a80b3e1121 /modules/pam_namespace/namespace.conf | |
| parent | c7a66c8ca510e12f43355ac7cc893834964235b7 (diff) | |
| download | pam-59812d1cf1127a1af65b530addff76be767092b1.tar.gz pam-59812d1cf1127a1af65b530addff76be767092b1.tar.bz2 pam-59812d1cf1127a1af65b530addff76be767092b1.zip | |
pam_namespace: secure tmp-inst directories
When using polyinstantiation for /tmp and/or /var/tmp, pam_namespace
creates subdirectories with fixed name tmp-inst. These paths should be
secured as early as possible to avoid that somehow these directories
could created and controlled by for example a malicious user or
service.
Ship a systemd service, which creates the directories early in
boot sequence with correct permissions and ownership.
Closes #111.
Signed-off-by: Topi Miettinen <toiwoton@gmail.com>
Diffstat (limited to 'modules/pam_namespace/namespace.conf')
| -rw-r--r-- | modules/pam_namespace/namespace.conf | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/modules/pam_namespace/namespace.conf b/modules/pam_namespace/namespace.conf index b611a0f2..75ec6193 100644 --- a/modules/pam_namespace/namespace.conf +++ b/modules/pam_namespace/namespace.conf @@ -21,7 +21,10 @@ # is explicitly called with an argument to ignore the mode of the # instance parent. System administrators should use this argument with # caution, as it will reduce security and isolation achieved by -# polyinstantiation. +# polyinstantiation. The parent directories (except $HOME) are created +# at boot by pam_namespace_helper, but in a live system, system +# administrators should create the parent directories before enabling +# them here. # #/tmp /tmp-inst/ level root,adm #/var/tmp /var/tmp/tmp-inst/ level root,adm |