RHEL 7 : grub2 (RHSA-2021:0704)

high Nessus Plugin ID 146952
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VPR Score: 7.3

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0704 advisory.

- grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled (CVE-2020-14372)

- grub2: Use-after-free in rmmod command (CVE-2020-25632)

- grub2: Out-of-bounds write in grub_usb_device_initialize() (CVE-2020-25647)

- grub2: Stack buffer overflow in grub_parser_split_cmdline() (CVE-2020-27749)

- grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled (CVE-2020-27779)

- grub2: Heap out-of-bounds write in short form option parser (CVE-2021-20225)

- grub2: Heap out-of-bounds write due to miscalculation of space required for quoting (CVE-2021-20233)

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://cwe.mitre.org/data/definitions/121.html

https://cwe.mitre.org/data/definitions/184.html

https://cwe.mitre.org/data/definitions/285.html

https://cwe.mitre.org/data/definitions/416.html

https://cwe.mitre.org/data/definitions/787.html

https://access.redhat.com/security/cve/CVE-2020-14372

https://access.redhat.com/security/cve/CVE-2020-25632

https://access.redhat.com/security/cve/CVE-2020-25647

https://access.redhat.com/security/cve/CVE-2020-27749

https://access.redhat.com/security/cve/CVE-2020-27779

https://access.redhat.com/security/cve/CVE-2021-20225

https://access.redhat.com/security/cve/CVE-2021-20233

https://access.redhat.com/errata/RHSA-2021:0704

https://bugzilla.redhat.com/1873150

https://bugzilla.redhat.com/1879577

https://bugzilla.redhat.com/1886936

https://bugzilla.redhat.com/1899966

https://bugzilla.redhat.com/1900698

https://bugzilla.redhat.com/1924696

https://bugzilla.redhat.com/1926263

Plugin Details

Severity: High

ID: 146952

File Name: redhat-RHSA-2021-0704.nasl

Version: 1.6

Type: local

Agent: unix

Published: 3/2/2021

Updated: 3/24/2021

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: High

VPR Score: 7.3

CVSS Score Source: CVE-2021-20233

CVSS v2.0

Base Score: 7.2

Temporal Score: 5.3

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

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

CVSS v3.0

Base Score: 8.2

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: cpe:/o:redhat:rhel_aus:7.2, p-cpe:/a:redhat:enterprise_linux:grub2, p-cpe:/a:redhat:enterprise_linux:grub2-common, p-cpe:/a:redhat:enterprise_linux:grub2-efi-aa64-modules, p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32, p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32-cdboot, p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32-modules, p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64, p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64-cdboot, p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64-modules, p-cpe:/a:redhat:enterprise_linux:grub2-pc, p-cpe:/a:redhat:enterprise_linux:grub2-pc-modules, p-cpe:/a:redhat:enterprise_linux:grub2-ppc-modules, p-cpe:/a:redhat:enterprise_linux:grub2-ppc64-modules, p-cpe:/a:redhat:enterprise_linux:grub2-ppc64le-modules, p-cpe:/a:redhat:enterprise_linux:grub2-tools, p-cpe:/a:redhat:enterprise_linux:grub2-tools-extra, p-cpe:/a:redhat:enterprise_linux:grub2-tools-minimal

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/2/2021

Vulnerability Publication Date: 3/2/2021

Reference Information

CVE: CVE-2020-14372, CVE-2020-25632, CVE-2020-25647, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233

RHSA: 2021:0704

CWE: 121, 184, 285, 416, 787