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https://github.com/Kicksecure/security-misc.git
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Merge branch 'master' into PAM-tmp-files-hardening
This commit is contained in:
Patrick Schleizer
GitHub
commit
2a602e78d6
26
README.md
26
README.md
@ -314,6 +314,8 @@ See:
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### Strong user account separation
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#### Permission Lockdown
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Read, write and execute access for "others" are removed during package
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installation, upgrade or PAM `mkhomedir` for all users who have home
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folders in `/home` by running, for example:
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@ -333,6 +335,30 @@ See:
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* `/usr/libexec/security-misc/permission-lockdown`
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* `/usr/share/pam-configs/mkhomedir-security-misc`
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#### umask
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Default `umask` is set to `027` for files created by non-root users
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such as for example user `user`.
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This is doing using pam module `pam_mkhomedir.so umask=027`.
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This means, files created by non-root users cannot be read by other
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non-root users by default. While Permission Lockdown already protects
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the `/home` folder, this protects other folders such as `/tmp`.
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`group` read permissions are not removed.
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This is unnecessary due to Debian's use of User Private Groups (UPGs).
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See also: https://wiki.debian.org/UserPrivateGroups
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Default `umask` is unchanged for root, because then configuration files
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created in `/etc` by the system administrator would be unreadable by
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"others" and break applications. Examples include `/etc/firefox-esr` and
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`/etc/thunderbird`.
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See:
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* `/usr/share/pam-configs/umask-security-misc`
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### SUID / SGID removal and permission hardening
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Not enabled by default yet.
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@ -1,3 +1,77 @@
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commit cdd66ee3762c441843d421a9e6b11a20580ed7ac
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Author: Patrick Schleizer <adrelanos@whonix.org>
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Date: Fri Nov 3 10:48:46 2023 -0400
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wrap-and-sort
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commit c33a3d9aadcc4c0ff90f330239eff4b7c905a022
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Author: Patrick Schleizer <adrelanos@whonix.org>
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Date: Fri Nov 3 10:44:48 2023 -0400
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readme
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commit d71ac03d96c9861513ff56c68aec9090ef5c50bb
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Author: Patrick Schleizer <adrelanos@whonix.org>
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Date: Fri Nov 3 10:36:15 2023 -0400
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comment
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commit 8326aecdb460fffa450bbf3ec0b051010f87ee2a
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Author: Patrick Schleizer <adrelanos@whonix.org>
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Date: Fri Nov 3 10:33:02 2023 -0400
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bumped changelog version
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commit b85d48eb83005da8fd9edc658c71493f407e3670
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Author: Patrick Schleizer <adrelanos@whonix.org>
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Date: Fri Nov 3 10:31:59 2023 -0400
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do not change default umask for root
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since this causes permission issues in `/etc/`
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https://github.com/Kicksecure/security-misc/pull/151
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commit 07540db90d60b10cbd10881b0024d8e8871330de
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Author: Patrick Schleizer <adrelanos@whonix.org>
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Date: Fri Nov 3 09:45:12 2023 -0400
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Revert "Revert "set default umask to 027""
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This reverts commit f8913ceb2e2fdd274011377c41b5d08e7459e4af.
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commit f8913ceb2e2fdd274011377c41b5d08e7459e4af
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Author: Patrick Schleizer <adrelanos@whonix.org>
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Date: Fri Nov 3 09:43:44 2023 -0400
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Revert "set default umask to 027"
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This reverts commit cd216095eb8d9387437e653d7764ec765ce42a10.
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commit 43bd789c30a562aa60349d019107277a428aece8
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Author: Patrick Schleizer <adrelanos@whonix.org>
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Date: Fri Nov 3 09:28:08 2023 -0400
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bumped changelog version
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commit cd216095eb8d9387437e653d7764ec765ce42a10
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Author: Patrick Schleizer <adrelanos@whonix.org>
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Date: Fri Nov 3 09:12:24 2023 -0400
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set default umask to 027
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using package libpam-umask
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https://www.debian.org/doc/manuals/securing-debian-manual/ch04s11.en.html#id-1.5.14.19
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https://github.com/Kicksecure/security-misc/pull/151
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commit a768f1f1ebfc29b0c0105f2965a4290f8dfd8e63
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Author: Patrick Schleizer <adrelanos@whonix.org>
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Date: Wed Nov 1 12:26:21 2023 -0400
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bumped changelog version
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commit bb14a058520b13e242fea9f3022c439c4677bd1d
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Merge: 5ed2a5c 44906e8
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Author: Patrick Schleizer <adrelanos@whonix.org>
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18
debian/changelog
vendored
18
debian/changelog
vendored
@ -1,3 +1,21 @@
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security-misc (3:32.7-1) unstable; urgency=medium
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* New upstream version (local package).
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-- Patrick Schleizer <adrelanos@whonix.org> Fri, 03 Nov 2023 16:06:43 +0000
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security-misc (3:32.6-1) unstable; urgency=medium
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* New upstream version (local package).
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-- Patrick Schleizer <adrelanos@whonix.org> Fri, 03 Nov 2023 14:33:02 +0000
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security-misc (3:32.5-1) unstable; urgency=medium
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* New upstream version (local package).
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-- Patrick Schleizer <adrelanos@whonix.org> Fri, 03 Nov 2023 13:28:08 +0000
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security-misc (3:32.4-1) unstable; urgency=medium
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* New upstream version (local package).
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23
debian/control
vendored
23
debian/control
vendored
@ -5,7 +5,10 @@ Source: security-misc
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Section: misc
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Priority: optional
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Maintainer: Patrick Schleizer <adrelanos@kicksecure.com>
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Build-Depends: debhelper (>= 13), debhelper-compat (= 13), config-package-dev, dh-apparmor
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Build-Depends: config-package-dev,
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debhelper (>= 13),
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debhelper-compat (= 13),
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dh-apparmor
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Homepage: https://www.kicksecure.com/wiki/Security-misc
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Vcs-Browser: https://github.com/Kicksecure/security-misc
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Vcs-Git: https://github.com/Kicksecure/security-misc.git
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@ -14,10 +17,22 @@ Rules-Requires-Root: no
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Package: security-misc
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Architecture: all
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Depends: python3, libglib2.0-bin, libpam-runtime, sudo, adduser, libcap2-bin,
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apparmor-profile-dist, helper-scripts, libpam-modules-bin, libpam-tmpdir,
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secure-delete, dmsetup, ${misc:Depends}
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Replaces: tcp-timestamps-disable, anon-gpg-tweaks, swappiness-lowest
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Depends: adduser,
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apparmor-profile-dist,
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dmsetup,
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helper-scripts,
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libcap2-bin,
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libglib2.0-bin,
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libpam-modules-bin,
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libpam-tmpdir,
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libpam-runtime,
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libpam-umask,
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python3,
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secure-delete,
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sudo,
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${misc:Depends}
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Replaces: anon-gpg-tweaks, swappiness-lowest, tcp-timestamps-disable
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Description: Enhances Miscellaneous Security Settings
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https://github.com/Kicksecure/security-misc/blob/master/README.md
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.
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@ -48,6 +48,8 @@ home_folder_access_rights_lockdown() {
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## https://unix.stackexchange.com/questions/156473/reasons-behind-the-default-groups-and-users-on-linux
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## In short, this is useful for "file sharing". A if user1 wants to share data with user2 the command
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## required to run is sudo addgroup user1 user2.
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## See also: user private groups UPGs
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## https://wiki.debian.org/UserPrivateGroups
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echo "$0: chmod o-rwx \"$folder_name\""
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chmod o-rwx "$folder_name"
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touch "/var/cache/security-misc/state-files/$user"
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8
usr/share/pam-configs/umask-security-misc
Normal file
8
usr/share/pam-configs/umask-security-misc
Normal file
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Name: Restrict umask to 027 (by package security-misc)
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Default: yes
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Priority: 100
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Session-Type: Additional
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Session-Interactive-Only: yes
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Session:
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[success=1 default=ignore] pam_succeed_if.so uid eq 0
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optional pam_umask.so umask=027
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