Hello Kurt, all,
Please assign a CVE for grub-mkconfig.
grub-mkconfig on Debian and derivatives sets mode 444 on grub.cfg
configuration files if there are no plaintext passwords in the
configuration file. However, the permissions are still set world
readable if the password_pbkdf2 directive includes a hashed
password.
The original bug report and proposed patch is by Francesco Poli:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=632598
Original compressed patch:
http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=safer_grub_cfg_perms.diff.gz;att=1;bug=632598
Patch, uncompressed and inlined:
diff -ruN a/grub-mkconfig b/grub-mkconfig --- a/grub-mkconfig
2011-05-31 11:33:31.000000000 +0200 +++ b/grub-mkconfig 2011-07-03
21:15:53.000000000 +0200 @@ -293,7 +293,7 @@ esac done
-if [ "x${grub_cfg}" != "x" ] && ! grep -q "^password "
${grub_cfg}.new ; then +if [ "x${grub_cfg}" != "x" ] && ! grep -q
"^password" ${grub_cfg}.new ; then chmod 444 ${grub_cfg}.new ||
true fi