7.4

CVE-2015-8370

Exploit
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Gnu ≫ Grub2 Version1.98
Gnu ≫ Grub2 Version1.99
Gnu ≫ Grub2 Version2.00
Gnu ≫ Grub2 Version2.01
Gnu ≫ Grub2 Version2.02
Fedoraproject ≫ Fedora Version23
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.1% 0.615
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 6.9 3.4 10
AV:L/AC:M/Au:N/C:C/I:C/A:C
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.4 1.4 5.9
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-191 Integer Underflow (Wrap or Wraparound)

The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

http://www.openwall.com/lists/oss-security/2024/01/15/3
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
Patch
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.html
Exploit
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.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