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Patrick Schleizer 2019-08-14 10:07:55 +00:00
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README.md
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@ -40,6 +40,9 @@ KASLR effectiveness.
* The SysRq key is restricted to only allow shutdowns/reboots.
A systemd service clears System.map on boot as these contain kernel symbols
that could be useful to an attacker.
/etc/kernel/postinst.d/30_remove-system-map
/lib/systemd/system/remove-system-map.service
/usr/lib/security-misc/remove-system.map
* Coredumps are disabled as they may contain important information such as
encryption keys or passwords.
@ -116,6 +119,7 @@ access rights restrictions:
* The default umask is changed to 006. This allows only the owner and group
to read and write to newly created files.
/etc/login.defs.security-misc
/usr/share/pam-configs/usergroups-security-misc
* Enables pam_umask.so usergroups so group permissions are same as user
permissions. Debian by default uses User Private Groups (UPG).
@ -129,12 +133,14 @@ pam_mkhomedir.so umask=006
* Removes read, write and execute access for others for all users who have
home folders under folder /home by running for example
"chmod o-rwx /home/user"
during package installation or upgrade. This will be done only once per folder
in folder /home so users who wish to relax file permissions are free to do so.
This is to protect previously created files in user home folder which were
previously created with lax file permissions prior installation of this
during package installation, upgrade or pam. This will be done only once per
folder in folder /home so users who wish to relax file permissions are free to
do so. This is to protect previously created files in user home folder which
were previously created with lax file permissions prior installation of this
package.
debian/security-misc.postinst
/usr/share/pam-configs/permission-lockdown-security-misc
/usr/lib/security-misc/permission-lockdown
access rights relaxations: