e67d4c0c3f
CVE-2017-1000367 - Potential overwrite of arbitrary files on Linux
On Linux systems, sudo parses the /proc/[pid]/stat file to determine the
device number of the process's tty (field 7). The fields in the file are
space-delimited, but it is possible for the command name (field 2) to
include spaces, which sudo does not account for. A user with sudo
privileges can cause sudo to use a device number of the user's choosing by
creating a symbolic link from the sudo binary to a name that contains a
space, followed by a number.
If SELinux is enabled on the system and sudo was built with SELinux support,
a user with sudo privileges may be able to to overwrite an arbitrary file.
This can be escalated to full root access by rewriting a trusted file such
as /etc/shadow or even /etc/sudoers.
For more details, see: https://www.sudo.ws/alerts/linux_tty.html
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit
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| README | ||
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