Test Kennung:	1.3.6.1.4.1.25623.1.0.883262
Kategorie:	CentOS Local Security Checks
Titel:	CentOS: Security Advisory for grub2 (CESA-2020:3217)
Zusammenfassung:	The remote host is missing an update for the 'grub2'; package(s) announced via the CESA-2020:3217 advisory.
Beschreibung:	Summary: The remote host is missing an update for the 'grub2' package(s) announced via the CESA-2020:3217 advisory. Vulnerability Insight: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments. The fwupdate packages provide a service that allows session software to update device firmware. Security Fix(es): * grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process (CVE-2020-10713) * grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow (CVE-2020-14308) * grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow (CVE-2020-14309) * grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow (CVE-2020-14310) * grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow (CVE-2020-14311) * grub2: Fail kernel validation without shim protocol (CVE-2020-15705) * grub2: Use-after-free redefining a function whilst the same function is already executing (CVE-2020-15706) * grub2: Integer overflow in initrd size handling (CVE-2020-15707) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * grub2 doesn't handle relative paths correctly for UEFI HTTP Boot (BZ#1616395) * UEFI HTTP boot over IPv6 does not work (BZ#1732765) Users of grub2 are advised to upgrade to these updated packages, which fix these bugs. Affected Software/OS: 'grub2' package(s) on CentOS 7. Solution: Please install the updated package(s). CVSS Score: 4.6 CVSS Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Querverweis:	Common Vulnerability Exposure (CVE) ID: CVE-2020-10713 Common Vulnerability Exposure (CVE) ID: CVE-2020-14308 Common Vulnerability Exposure (CVE) ID: CVE-2020-14309 Common Vulnerability Exposure (CVE) ID: CVE-2020-14310 Common Vulnerability Exposure (CVE) ID: CVE-2020-14311 Common Vulnerability Exposure (CVE) ID: CVE-2020-15705 Common Vulnerability Exposure (CVE) ID: CVE-2020-15706 Common Vulnerability Exposure (CVE) ID: CVE-2020-15707
Copyright	Copyright (C) 2020 Greenbone Networks GmbH

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