From cb7b35ca10c82c9725c3527e3ec5fb8cb7c61bc0 Mon Sep 17 00:00:00 2001 From: Eduardo Otubo Date: Fri, 7 May 2021 13:36:08 +0200 Subject: limit permissions on def_log_file This sets a default mode of 0600 on def_log_file, and makes this configurable via the def_log_file_mode option in cloud.cfg. LP: #1541196 Resolves: rhbz#1424612 X-approved-upstream: true Conflicts 21.1: cloudinit/stages.py: adjusting call of ensure_file() to use more recent version Signed-off-by: Eduardo Otubo --- cloudinit/settings.py | 1 + cloudinit/stages.py | 1 + doc/examples/cloud-config.txt | 4 ++++ 3 files changed, 6 insertions(+) diff --git a/cloudinit/settings.py b/cloudinit/settings.py index 39650a5b..3c2145e9 100644 --- a/cloudinit/settings.py +++ b/cloudinit/settings.py @@ -49,6 +49,7 @@ CFG_BUILTIN = { "None", ], "def_log_file": "/var/log/cloud-init.log", + "def_log_file_mode": 0o600, "log_cfgs": [], "mount_default_fields": [None, None, "auto", "defaults,nofail", "0", "2"], "ssh_deletekeys": False, diff --git a/cloudinit/stages.py b/cloudinit/stages.py index 3f17294b..61db1dbd 100644 --- a/cloudinit/stages.py +++ b/cloudinit/stages.py @@ -205,6 +205,7 @@ class Init(object): def _initialize_filesystem(self): util.ensure_dirs(self._initial_subdirs()) log_file = util.get_cfg_option_str(self.cfg, "def_log_file") + log_file_mode = util.get_cfg_option_int(self.cfg, "def_log_file_mode") if log_file: util.ensure_file(log_file, mode=0o640, preserve_mode=True) perms = self.cfg.get("syslog_fix_perms") diff --git a/doc/examples/cloud-config.txt b/doc/examples/cloud-config.txt index a2b4a3fa..0ccf3147 100644 --- a/doc/examples/cloud-config.txt +++ b/doc/examples/cloud-config.txt @@ -414,10 +414,14 @@ timezone: US/Eastern # if syslog_fix_perms is a list, it will iterate through and use the # first pair that does not raise error. # +# 'def_log_file' will be created with mode 'def_log_file_mode', which +# is specified as a numeric value and defaults to 0600. +# # the default values are '/var/log/cloud-init.log' and 'syslog:adm' # the value of 'def_log_file' should match what is configured in logging # if either is empty, then no change of ownership will be done def_log_file: /var/log/my-logging-file.log +def_log_file_mode: 0600 syslog_fix_perms: syslog:root # you can set passwords for a user or multiple users -- 2.31.1