CentOS 7 : grub2 (CESA-2020:3217)

Medium Nessus Plugin ID 139236

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VPR Score: 6.9


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


The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2020:3217 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.


Update the affected packages.

See Also











Plugin Details

Severity: Medium

ID: 139236

File Name: centos_RHSA-2020-3217.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2020/07/31

Updated: 2020/09/25

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 6.9

CVSS Score Source: CVE-2020-14309

CVSS v2.0

Base Score: 4.6

Temporal Score: 3.4

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 6.7

Temporal Score: 5.8

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

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

Vulnerability Information

CPE: cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:grub2, p-cpe:/a:centos:centos:grub2-common, p-cpe:/a:centos:centos:grub2-efi-ia32, p-cpe:/a:centos:centos:grub2-efi-ia32-cdboot, p-cpe:/a:centos:centos:grub2-efi-ia32-modules, p-cpe:/a:centos:centos:grub2-efi-x64, p-cpe:/a:centos:centos:grub2-efi-x64-cdboot, p-cpe:/a:centos:centos:grub2-efi-x64-modules, p-cpe:/a:centos:centos:grub2-i386-modules, p-cpe:/a:centos:centos:grub2-pc, p-cpe:/a:centos:centos:grub2-pc-modules, p-cpe:/a:centos:centos:grub2-tools, p-cpe:/a:centos:centos:grub2-tools-extra, p-cpe:/a:centos:centos:grub2-tools-minimal, p-cpe:/a:centos:centos:mokutil, p-cpe:/a:centos:centos:shim-ia32, p-cpe:/a:centos:centos:shim-unsigned-ia32, p-cpe:/a:centos:centos:shim-unsigned-x64, p-cpe:/a:centos:centos:shim-x64

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/07/30

Vulnerability Publication Date: 2020/07/29

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: 2020:3217

IAVA: 2020-A-0349

CWE: 78, 122, 190, 416, 440, 787