CVE-2015-8370

Status: Modified

Last modified: 21-10-2024

Published: 16-12-2015

7.4

SUMMARY 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.

Access CVSS3 CVE-2015-8370

Attack Complexity	Attack Vector	Privileges Required	Scope	User Interaction
HIGH	LOCAL	NONE	UNCHANGED	NONE

Impact CVSS3 CVE-2015-8370

Confidentiality	Integrity	Availability
HIGH	HIGH	HIGH

Details CVE-2015-8370

EPSS	0.00108
EPSS %	0.44573
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 http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00040.html http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00041.html http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00043.html http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00044.html http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00003.html http://packetstormsecurity.com/files/134831/Grub2-Authentication-Bypass.html http://rhn.redhat.com/errata/RHSA-2015-2623.html http://seclists.org/fulldisclosure/2015/Dec/69 http://www.debian.org/security/2015/dsa-3421 http://www.openwall.com/lists/oss-security/2015/12/15/6 http://www.openwall.com/lists/oss-security/2024/01/15/3 http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html http://www.securityfocus.com/archive/1/537115/100/0/threaded http://www.securityfocus.com/bid/79358 http://www.securitytracker.com/id/1034422 http://www.ubuntu.com/usn/USN-2836-1 https://security.gentoo.org/glsa/201512-03
CWE	CWE-191
Vulnerable Configurations	cpe:2.3:a:gnu:grub2:1.98:::::::* cpe:2.3:a:gnu:grub2:1.98:::::::* cpe:2.3:a:gnu:grub2:1.99:::::::* cpe:2.3:a:gnu:grub2:1.99:::::::* cpe:2.3:a:gnu:grub2:2.00:::::::* cpe:2.3:a:gnu:grub2:2.00:::::::* cpe:2.3:a:gnu:grub2:2.01:::::::* cpe:2.3:a:gnu:grub2:2.01:::::::* cpe:2.3:a:gnu:grub2:2.02:::::::* cpe:2.3:a:gnu:grub2:2.02:::::::* cpe:2.3:o:fedoraproject:fedora:23:::::::* cpe:2.3:o:fedoraproject:fedora:23:::::::*
CVSS3 Source	134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS3 Type	Secondary
CVSS3 Vector	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H