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Jann Horn, Project Zero (Google) discovered that ntfs-3g, a read-write NTFS driver for FUSE does not not scrub the environment before executing modprobe to load the fuse module. This influence the behavior of modprobe (MODPROBE_OPTIONS environment variable, --config and --dirname options) potentially allowing for local root privilege escalation if ntfs-3g is installed setuid. Notice that Buildroot does NOT install netfs-3g setuid root, but custom permission tables might be used, causing it to vulnerable to the above. ntfs-3g does not seem to have a publicly available version control system and no new releases have been made, so instead grab the patch from Debian. Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches