ID de Prueba:	1.3.6.1.4.1.25623.1.0.105514
Categoría:	F5 Local Security Checks
Título:	F5 BIG-IP - GRUB2 vulnerability CVE-2015-8370
Resumen:	The remote host is missing a security patch.
Descripción:	Summary: The remote host is missing a security patch. Vulnerability Insight: 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. Vulnerability Impact: This vulnerability can be exploited under certain circumstances, allowing physically proximate attackers to bypass the system's access authentication. By default, the GRUB2 configuration used in F5 products does not expose this issue. The customization of GRUB2 configurations is not supported. Solution: See the referenced vendor advisory for a solution. CVSS Score: 6.9 CVSS Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C
Referencia Cruzada:	Common Vulnerability Exposure (CVE) ID: CVE-2015-8370 BugTraq ID: 79358 http://www.securityfocus.com/bid/79358 Bugtraq: 20151215 Back to 28: Grub2 Authentication Bypass 0-Day [CVE-2015-8370] (Google Search) http://www.securityfocus.com/archive/1/537115/100/0/threaded Debian Security Information: DSA-3421 (Google Search) http://www.debian.org/security/2015/dsa-3421 http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174049.html http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173703.html http://seclists.org/fulldisclosure/2015/Dec/69 https://security.gentoo.org/glsa/201512-03 http://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.html http://packetstormsecurity.com/files/134831/Grub2-Authentication-Bypass.html http://www.openwall.com/lists/oss-security/2015/12/15/6 RedHat Security Advisories: RHSA-2015:2623 http://rhn.redhat.com/errata/RHSA-2015-2623.html http://www.securitytracker.com/id/1034422 SuSE Security Announcement: SUSE-SU-2015:2385 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00039.html SuSE Security Announcement: SUSE-SU-2015:2386 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00040.html SuSE Security Announcement: SUSE-SU-2015:2387 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00041.html SuSE Security Announcement: SUSE-SU-2015:2399 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00044.html SuSE Security Announcement: openSUSE-SU-2015:2375 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00037.html SuSE Security Announcement: openSUSE-SU-2015:2392 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00043.html SuSE Security Announcement: openSUSE-SU-2016:0036 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00003.html http://www.ubuntu.com/usn/USN-2836-1
Copyright	Copyright (C) 2016 Greenbone Networks GmbH

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