CVE-2015-8370 | BDVDB-2026-73383 Detail
Description#
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: local.
Weaknesses#
- CWE-191 Integer Underflow (Wrap or Wraparound)
References#
- http://packetstormsecurity.com/files/134831/Grub2-Authentication-Bypass.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00043.html
- http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00003.html
- http://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.html
- http://www.securityfocus.com/bid/79358
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00037.html
- http://www.securitytracker.com/id/1034422
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00041.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00040.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.openwall.com/lists/oss-security/2015/12/15/6
- http://www.securityfocus.com/archive/1/537115/100/0/threaded
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00039.html
- http://seclists.org/fulldisclosure/2015/Dec/69
Show all 23
- https://security.gentoo.org/glsa/201512-03
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173703.html
- http://www.ubuntu.com/usn/USN-2836-1
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174049.html
- http://rhn.redhat.com/errata/RHSA-2015-2623.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00044.html
- http://www.debian.org/security/2015/dsa-3421
- http://www.openwall.com/lists/oss-security/2024/01/15/3
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.