Merge remote-tracking branch 'raja-gerwal/master'

README.md

@@ -149,6 +149,11 @@ of multiple vulnerabilities so it is blacklisted.
 * The MSR kernel module is blacklisted to prevent CPU MSRs from being
 abused to write to arbitrary memory.
 
+* Disables a large array of uncommon file systems and network file systems that reduces the attack surface especially against legacy approaches.
+
+* Disables the use of CD-ROM devices by default.
+
+* Provides some blocking of the interface between the [Intel Management Engine (ME)](https://www.kernel.org/doc/html/latest/driver-api/mei/mei.html) and the OS.
 ### Other
 
 * A systemd service clears the System.map file on boot as these contain kernel

etc/modprobe.d/30_security-misc.conf

@@ -1,25 +1,36 @@
 ## Copyright (C) 2012 - 2022 ENCRYPTED SUPPORT LP <adrelanos@whonix.org>
 ## See the file COPYING for copying conditions.
 
-## https://phabricator.whonix.org/T486
+# See the following links for a community discussion and overview regarding the selections
+# https://forums.whonix.org/t/blacklist-more-kernel-modules-to-reduce-attack-surface/7989
+# https://madaidans-insecurities.github.io/guides/linux-hardening.html#kasr-kernel-modules
+
+# Blacklist automatic conntrack helper assignment
+# https://phabricator.whonix.org/T486
 options nf_conntrack nf_conntrack_helper=0
 
-# Blacklists bluetooth to reduce attack surface.
-# Bluetooth also has a history of security vulnerabilities:
-#
+# Blacklist bluetooth to reduce attack surface due to extended history of security vulnerabilities
 # https://en.wikipedia.org/wiki/Bluetooth#History_of_security_concerns
-install bluetooth /bin/false
-install btusb /bin/false
+install bluetooth /bin/disabled-by-security-misc
+install btusb /bin/disabled-by-security-misc
 
-# Blacklist thunderbolt and firewire to prevent some DMA attacks.
-install firewire-core /bin/false
-install thunderbolt /bin/false
+# Blacklist thunderbolt and firewire modules to prevent some DMA attacks
+install thunderbolt /bin/disabled-by-security-misc
+install firewire-core /bin/disabled-by-security-misc
+install firewire_core /bin/disabled-by-security-misc
+install firewire-ohci /bin/disabled-by-security-misc
+install firewire_ohci /bin/disabled-by-security-misc
+install ohci1394 /bin/disabled-by-security-misc
+install sbp2 /bin/disabled-by-security-misc
+install dv1394 /bin/disabled-by-security-misc
+install raw1394 /bin/disabled-by-security-misc
+install video1394 /bin/disabled-by-security-misc
+install firewire-sbp2 /bin/disabled-by-security-misc
 
-# Blacklist CPU MSRs as they can be abused to write to
-# arbitrary memory.
-install msr /bin/false
+# Blacklist CPU MSRs as they can be abused to write to arbitrary memory.
+install msr /bin/disabled-by-security-misc
 
-# Disables unneeded network protocols that will likely not be used as these may have unknown vulnerabilties.
+# Blacklists unneeded network protocols that will likely not be used as these may have unknown vulnerabilties.
 #
 # Credit to Tails (https://tails.boum.org/blueprint/blacklist_modules/) for some of these.
 #
@@ -27,34 +38,54 @@ install msr /bin/false
 #
 # > Other distributions like Ubuntu[1] and Fedora[2] already ship a blacklist for various network protocols which aren't much in use by users and have a poor security track record.
 #
-install dccp /bin/false
-install sctp /bin/false
-install rds /bin/false
-install tipc /bin/false
-install n-hdlc /bin/false
-install ax25 /bin/false
-install netrom /bin/false
-install x25 /bin/false
-install rose /bin/false
-install decnet /bin/false
-install econet /bin/false
-install af_802154 /bin/false
-install ipx /bin/false
-install appletalk /bin/false
-install psnap /bin/false
-install p8023 /bin/false
-install p8022 /bin/false
-install can /bin/false
-install atm /bin/false
+install dccp /bin/disabled-by-security-misc
+install sctp /bin/disabled-by-security-misc
+install rds /bin/disabled-by-security-misc
+install tipc /bin/disabled-by-security-misc
+install n-hdlc /bin/disabled-by-security-misc
+install ax25 /bin/disabled-by-security-misc
+install netrom /bin/disabled-by-security-misc
+install x25 /bin/disabled-by-security-misc
+install rose /bin/disabled-by-security-misc
+install decnet /bin/disabled-by-security-misc
+install econet /bin/disabled-by-security-misc
+install af_802154 /bin/disabled-by-security-misc
+install ipx /bin/disabled-by-security-misc
+install appletalk /bin/disabled-by-security-misc
+install psnap /bin/disabled-by-security-misc
+install p8023 /bin/disabled-by-security-misc
+install p8022 /bin/disabled-by-security-misc
+install can /bin/disabled-by-security-misc
+install atm /bin/disabled-by-security-misc
 
-# Disable uncommon filesystems to reduce attack surface
-install cramfs /bin/false
-install udf /bin/false
+# Blacklist uncommon file systems to reduce attack surface
+install cramfs /bin/disabled-by-security-misc
+install freevxfs /bin/disabled-by-security-misc
+install jffs2 /bin/disabled-by-security-misc
+install hfs /bin/disabled-by-security-misc
+install hfsplus /bin/disabled-by-security-misc
+install udf /bin/disabled-by-security-misc
 
-## Blacklists the vivid kernel module as it's only required for
-## testing and has been the cause of multiple vulnerabilities.
-##
-## https://forums.whonix.org/t/kernel-recompilation-for-better-hardening/7598/233
-## https://www.openwall.com/lists/oss-security/2019/11/02/1
-## https://github.com/a13xp0p0v/kconfig-hardened-check/commit/981bd163fa19fccbc5ce5d4182e639d67e484475
-install vivid /bin/false
+# Blacklist uncommon network file systems to reduce attack surface
+install cifs /bin/disabled-by-security-misc
+install nfs /bin/disabled-by-security-misc
+install nfsv3 /bin/disabled-by-security-misc
+install nfsv4 /bin/disabled-by-security-misc
+install ksmbd /bin/disabled-by-security-misc
+install gfs2 /bin/disabled-by-security-misc
+
+# Blacklists the vivid kernel module as it's only required for testing and has been the cause of multiple vulnerabilities
+# https://forums.whonix.org/t/kernel-recompilation-for-better-hardening/7598/233
+# https://www.openwall.com/lists/oss-security/2019/11/02/1
+# https://github.com/a13xp0p0v/kconfig-hardened-check/commit/981bd163fa19fccbc5ce5d4182e639d67e484475
+install vivid /bin/disabled-by-security-misc
+
+# Blacklist CD-ROM devices
+# https://nvd.nist.gov/vuln/detail/CVE-2018-11506
+install cdrom /bin/disabled-by-security-misc
+install sr_mod /bin/disabled-by-security-misc
+
+# Blacklist Intel Management Engine (ME) interface with the OS
+# https://www.kernel.org/doc/html/latest/driver-api/mei/mei.html
+install mei /bin/disabled-by-security-misc
+install mei-me /bin/disabled-by-security-misc

usr/bin/disabled-by-security-misc

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+## Copyright (C) 2019 - 2022 ENCRYPTED SUPPORT LP <adrelanos@whonix.org>
+## See the file COPYING for copying conditions.
+
+## Alerts the user that a kernel module failed to load due to it being blacklisted by default.
+
+echo "$0: ERROR: This kernel module is disabled by package security-misc by default. See the configuration file /etc/modprobe.d/30_security-misc.conf | args: $@" >&2
+
+exit 1