8f41d35fce
In the code, the for loop advanced the entry pointer to the next entry before checking if the next entry is within the system use area boundary. Another issue in the code was that there is no check for the size of system use area. For a corrupted system, the size of system use area can be less than the size of minimum SUSP entry size (4 bytes). These can cause buffer overrun. The fixes added the checks to ensure the read is valid and within the boundary. Signed-off-by: Lidong Chen <lidong.chen@oracle.com> Reviewed-by: Thomas Schmitt <scdbackup@gmx.net> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'