Multiple integer underflows in Grub2 1.98 up to and including 2.02 allow physically proximate malicious users 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.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
gnu grub2 2.02 |
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gnu grub2 2.01 |
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gnu grub2 2.00 |
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gnu grub2 1.99 |
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gnu grub2 1.98 |
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fedoraproject fedora 23 |
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