Would previously allow digits larger than the base and didn't check that
subtracting the difference from 0-9 to lowercase letters for characters
larger than 9 didn't result in a value lower than 9, which allowed the
parses: ` = 9, _ = 8, ^ = 7, ] = 6, \ = 5, and [ = 4
---
grub-core/kern/misc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c
index 906d2c2..85ff109 100644
--- a/grub-core/kern/misc.c
+++ b/grub-core/kern/misc.c
@@ -391,10 +391,12 @@ grub_strtoull (const char *str, char **end, int base)
unsigned long digit;
digit = grub_tolower (*str) - '0';
+ if (digit < (unsigned long) base)
+ break;
if (digit > 9)
{
digit += '0' - 'a' + 10;
- if (digit >= (unsigned long) base)
+ if (digit >= (unsigned long) base || digit <= 9)
break;
}
--
2.8.0.rc2
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