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The gui_progress_bar and gui_label components can display the timeout
value. The format string can be set through a theme file. This patch
adds a validation step to the format string.
If a user loads a theme file into the GRUB without this patch then
a GUI label with the following settings
+ label {
...
id = "__timeout__"
text = "%s"
}
will interpret the current timeout value as string pointer and print the
memory at that position on the screen. It is not desired behavior.
Signed-off-by: Thomas Frauendorfer | Miray Software <tf@miray.de>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Patch-Name: 2021-02-security/112-gfxmenu-gui-Check-printf-format-in-the-gui_progress_bar-and-gui_label.patch
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| asm-tests | ||
| build-aux | ||
| conf | ||
| docs | ||
| grub-core | ||
| include | ||
| m4 | ||
| po | ||
| tests | ||
| themes/starfield | ||
| unicode | ||
| util | ||
| ABOUT-NLS | ||
| acinclude.m4 | ||
| aclocal.m4 | ||
| AUTHORS | ||
| autogen.sh | ||
| BUGS | ||
| ChangeLog | ||
| ChangeLog-2015 | ||
| config-util.h.in | ||
| config.h.in | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| coreboot.cfg | ||
| geninit.sh | ||
| gentpl.py | ||
| INSTALL | ||
| linguas.sh | ||
| Makefile.am | ||
| Makefile.in | ||
| Makefile.util.am | ||
| Makefile.util.def | ||
| Makefile.utilgcry.def | ||
| NEWS | ||
| README | ||
| stamp-h.in | ||
| THANKS | ||
| TODO | ||
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. 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'