Multiple integer underflows in Grub2 1.98 through 2.02 allow
physically proximate attackers to bypass authentication, obtain
sensitive information, or cause a denial of service (disk corruption)
via backspace characters in the (1) grub_username_get function in
grub-core/normal/auth.c or the (2) grub_password_get function in
lib/crypto.c, which trigger an "Off-by-two" or "Out of bounds
overwrite" memory error.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
BUGTRAQ:20151215 Back to 28: Grub2 Authentication Bypass 0-Day [CVE-2015-8370]
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