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d84e89f473
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>
Patch-Name: safe-alloc-4.patch
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| .. | ||
| coreboot | ||
| emu | ||
| fb | ||
| i386/pc | ||
| readers | ||
| bitmap_scale.c | ||
| bitmap.c | ||
| bochs.c | ||
| capture.c | ||
| cirrus.c | ||
| colors.c | ||
| efi_gop.c | ||
| efi_uga.c | ||
| ieee1275.c | ||
| radeon_fuloong2e.c | ||
| radeon_yeeloong3a.c | ||
| sis315_init.c | ||
| sis315pro.c | ||
| sm712_init.c | ||
| sm712.c | ||
| video.c | ||