Hello, In Fedora 12 several daemons (e.g. dhclient) were modified to drop unnecessary capabilities, most importantly the "dac_override" capability, allowing the daemon to ignore file permission bits. This, in combination with removing some permissions from important system directories and files (such as /etc/shadow), has restricted the amount of damage that can be done by exploiting such daemons. We can extend the protection to all executables by a simple addition to redhat-rpm-config (https://bugzilla.redhat.com/show_bug.cgi?id=556897 ). After applying this patch, executable files in all rebuilt packages would not be writeable, most often using mode 0555. I don't expect any problems from this change (it can affect only daemons that drop capabilities, and executables owned by other users than root); in the unusual case where making the executeable not writeable did case some problems, the packager could override the change by explicitly specifying the required permissions using %attr in the %files section of the spec file. What do you think? Thank you, Mirek -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
