3f05d693d1
This attempts to fix the places where we do the following where
arithmetic_expr may include unvalidated data:
X = grub_malloc(arithmetic_expr);
It accomplishes this by doing the arithmetic ahead of time using grub_add(),
grub_sub(), grub_mul() and testing for overflow before proceeding.
Among other issues, this fixes:
- allocation of integer overflow in grub_video_bitmap_create()
reported by Chris Coulson,
- allocation of integer overflow in grub_png_decode_image_header()
reported by Chris Coulson,
- allocation of integer overflow in grub_squash_read_symlink()
reported by Chris Coulson,
- allocation of integer overflow in grub_ext2_read_symlink()
reported by Chris Coulson,
- allocation of integer overflow in read_section_as_string()
reported by Chris Coulson.
Fixes: CVE-2020-14309, CVE-2020-14310, CVE-2020-14311
Signed-off-by: Peter Jones <pjones@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
|
||
|---|---|---|
| .. | ||
| coreboot | ||
| pc | ||
| bsd.c | ||
| bsd32.c | ||
| bsd64.c | ||
| bsd_pagetable.c | ||
| bsdXX.c | ||
| linux.c | ||
| multiboot_mbi.c | ||
| xen.c | ||
| xen_file.c | ||
| xen_file32.c | ||
| xen_file64.c | ||
| xen_fileXX.c | ||
| xnu.c | ||