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CentOS 8 : grub2 (CESA-2020:3216)

high Nessus Plugin ID 146030

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Synopsis

The remote CentOS host is missing one or more security updates.

Description

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2020:3216 advisory.

 - 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)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2020:3216

Plugin Details

Severity: High

ID: 146030

File Name: centos8_RHSA-2020-3216.nasl

Version: 1.7

Type: local

Agent: unix

Published: 2/1/2021

Updated: 1/24/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2020-14309

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.4

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS Score Source: CVE-2020-10713

Vulnerability Information

CPE: p-cpe:/a:centos:centos:grub2-common, p-cpe:/a:centos:centos:grub2-tools, p-cpe:/a:centos:centos:grub2-efi-x64, p-cpe:/a:centos:centos:grub2-ppc64le-modules, p-cpe:/a:centos:centos:grub2-ppc64le, p-cpe:/a:centos:centos:grub2-efi-ia32-modules, p-cpe:/a:centos:centos:grub2-efi-aa64-cdboot, cpe:/o:centos:centos:8-stream, p-cpe:/a:centos:centos:grub2-efi-aa64, p-cpe:/a:centos:centos:shim-unsigned-x64, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:grub2-efi-ia32-cdboot, p-cpe:/a:centos:centos:grub2-efi-x64-cdboot, p-cpe:/a:centos:centos:grub2-efi-aa64-modules, p-cpe:/a:centos:centos:grub2-tools-extra, p-cpe:/a:centos:centos:grub2-tools-efi, p-cpe:/a:centos:centos:grub2-tools-minimal, p-cpe:/a:centos:centos:grub2-pc, p-cpe:/a:centos:centos:grub2-efi-x64-modules, p-cpe:/a:centos:centos:grub2-pc-modules, p-cpe:/a:centos:centos:grub2-efi-ia32

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/29/2020

Vulnerability Publication Date: 7/29/2020

Reference Information

CVE: CVE-2020-10713, CVE-2020-14308, CVE-2020-14309, CVE-2020-14310, CVE-2020-14311, CVE-2020-15705, CVE-2020-15706, CVE-2020-15707

RHSA: 2020:3216