readme

README.md

@@ -1,6 +1,6 @@
 # enhances misc security settings #
 
-kernel hardening;
+kernel hardening:
 
 * deactivates Netfilter's connection tracking helper
 Netfilter's connection tracking helper module increases kernel attack
@@ -89,15 +89,26 @@ seeing each other's processes.
 
 restricts access to the root account:
 
-* Su is restricted to only users within the root group which prevents users
+* Su is restricted to only users within the sudo group which prevents users
 from using su to gain root access or switch user accounts.
+/usr/share/pam-configs/wheel
+(Which results in a change in /etc/pam.d/common-auth.)
 
-* Logging into the root account from a terminal is prevented.
+* Logging into the root account from a virtual, serial, whatnot console is
+prevented by shipping an existing and empty /etc/securetty.
+(Deletion of /etc/securetty has a different effect.)
+/etc/securetty.security-misc
 
 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
+
+* Enables pam_umask.so usergroups so group permissions are same as user
+permissions. Debian by default uses User Private Groups (UPG).
+https://wiki.debian.org/UserPrivateGroups
+/usr/share/pam-configs/usergroups
 
 * Removes read, write and execute access for others for all users who have
 home folders under folder /home by running for example
@@ -108,6 +119,26 @@ This is to protect previously created files in user home folder which were
 previously created with lax file permissions prior installation of this
 package.
 
+access rights relaxations:
+
+This package does (not yet) automatically lock the root account password.
+It is not clear that would be sane in such a package.
+It is recommended to lock and expire the root account.
+In new Whonix builds, root account will be locked by package
+anon-base-files.
+https://www.whonix.org/wiki/Root
+https://www.whonix.org/wiki/Dev/Permissions
+https://forums.whonix.org/t/restrict-root-access/7658
+However, a locked root password will break rescue and emergency shell.
+Therefore this package enables passwordless resuce and emergency shell.
+This is the same solution that Debian will likely addapt for Debian
+installer.
+https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=802211
+Adverse security effects can be prevented by setting up BIOS password
+protection, grub password protection and/or full disk encryption.
+/etc/systemd/system/emergency.service.d/override.conf
+/etc/systemd/system/rescue.service.d/override.conf
+
 Disables TCP Time Stamps:
 
 TCP time stamps (RFC 1323) allow for tracking clock
@@ -141,9 +172,10 @@ of the user connection.
 
 Application specific hardening:
 
-* deactivates previews in Dolphin;
-* deactivates previews in Nautilus;
-* deactivates thumbnails in Thunar;
+* Enables APT seccomp-BPF sandboxing. /etc/apt/apt.conf.d/40sandbox
+* Deactivates previews in Dolphin.
+* Deactivates previews in Nautilus.
+* Deactivates thumbnails in Thunar.
 ## How to install `security-misc` using apt-get ##
 
 1\. Add [Whonix's Signing Key](https://www.whonix.org/wiki/Whonix_Signing_Key).