Integer overflow in GNU Grub2
CVE-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.
EPSS: 0.011 (63.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Gnu Grub2 — versions 1.98, 1.99, 2.00
- Fedoraproject Fedora — versions 23
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (Exploit)
- cve@mitre.org (vdb-entry)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vdb-entry)
- cve@mitre.org (Patch)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
Frequently asked questions
- What is CVE-2015-8370?
- CVE-2015-8370 is a high-severity vulnerability in GNU Grub2, classified under CWE-264. CVSS score: 7.4/10. Published 2015-12-16.
- How severe is CVE-2015-8370?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2015-8370 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.