** Changed in: partman-efi (Debian)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1390183
Title:
EFI directory is insecure by default
Status in “mountall” package in Ubuntu:
Fix Released
Status in “partman-efi” package in Ubuntu:
Fix Released
Status in “partman-efi” package in Debian:
Fix Released
Bug description:
The EFI directory on UEFI/GPT installations (/boot/efi) is insecure by
default. It has permissions/mode 0777 (rwx for all). This makes the
directory very vulnerable to tampering. Although it may be possible to
repair damage to this directory externally if the system becomes
unbootable due to such damage, having to do this is undesirable and
usually not easy for most users. Distributions other than Ubuntu may
also be having this issue, I have not checked, but some distributions
enable secure permissions by default (e.g., Fedora). One (or maybe the
only) reason for the default configuration being the way it is may be
that the EFI partition uses a FAT file system. However, enabling a
umask through /etc/fstab as in Fedora, e.g., umask=0077, should make
it much more secure.
Ubuntu 14.10 Utopic Unicorn (x86_64/amd64)
Expected default configuration:-
A critical system directory such as /boot/efi should be inaccessible to
non-root users by default.
Actual default configuration:-
The EFI directory /boot/efi is accessible to all users irrespective of the
user account's privileges (permission mode 0777/rwxrwxrwx).
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