Detections
Analytics

Oracle Linux 7 : grub2 (ELSA-2021-9076)

high Nessus Plugin ID 146989

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Synopsis

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

Description

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9076 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://linux.oracle.com/errata/ELSA-2021-9076.html

Plugin Details

Severity: High

ID: 146989

File Name: oraclelinux_ELSA-2021-9076.nasl

Version: 1.6

Type: local

Agent: unix

Published: 3/3/2021

Updated: 1/18/2024

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.1

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

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

CVSS Score Source: CVE-2021-20233

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

Vulnerability Information

CPE: cpe:/o:oracle:linux:7, p-cpe:/a:oracle:linux:grub2, p-cpe:/a:oracle:linux:grub2-common, p-cpe:/a:oracle:linux:grub2-efi-aa64, p-cpe:/a:oracle:linux:grub2-efi-aa64-cdboot, p-cpe:/a:oracle:linux:grub2-efi-ia32, p-cpe:/a:oracle:linux:grub2-efi-ia32-cdboot, p-cpe:/a:oracle:linux:grub2-efi-ia32-modules, p-cpe:/a:oracle:linux:grub2-efi-x64, p-cpe:/a:oracle:linux:grub2-efi-x64-cdboot, p-cpe:/a:oracle:linux:grub2-efi-x64-modules, p-cpe:/a:oracle:linux:grub2-pc, p-cpe:/a:oracle:linux:grub2-pc-modules, p-cpe:/a:oracle:linux:grub2-tools, p-cpe:/a:oracle:linux:grub2-tools-extra, p-cpe:/a:oracle:linux:grub2-tools-minimal

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

Exploit Available: true

Exploit Ease: 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