CVSS 3.1
7.4 highCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2015-8370
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.
Severity
- EPSS
- 1.1% chance of exploitation in the next 30 days; higher than 65% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-264, CWE-191
- Published
- Modified
- Record from
- the NVD, synced
Affected
- fedoraproject:fedora
- gnu:grub2
References
- http://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173703.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174049.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00037.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00039.html