The bootloader configuration module (pyanaconda/bootloader.py) in Anaconda uses 755 permissions for /etc/grub.d, which allows local users to obtain password hashes and conduct brute force password guessing attacks.
https://bugzilla.redhat.com/show_bug.cgi?id=819031
http://www.securityfocus.com/bid/53486
http://www.openwall.com/lists/oss-security/2024/01/15/3
http://www.openwall.com/lists/oss-security/2012/05/04/12
http://www.openwall.com/lists/oss-security/2012/05/04/10
http://lists.fedoraproject.org/pipermail/package-announce/2012-May/080188.html