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Azure Linux 3.0 Security Update: CBL-Mariner Releases / grub2 (CVE-2020-14311)

medium Nessus Plugin ID 241871

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Synopsis

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

Description

The version of CBL-Mariner Releases / grub2 installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2020-14311 advisory.

 - There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow. (CVE-2020-14311)

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://nvd.nist.gov/vuln/detail/CVE-2020-14311

Plugin Details

Severity: Medium

ID: 241871

File Name: azure_linux_CVE-2020-14311.nasl

Version: 1.4

Type: local

Published: 7/11/2025

Updated: 1/22/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 2.7

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

CVSS Score Source: CVE-2020-14311

CVSS v3

Risk Factor: Medium

Base Score: 6

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: p-cpe:/a:microsoft:azure_linux:grub2-configuration, p-cpe:/a:microsoft:azure_linux:grub2-efi-binary, p-cpe:/a:microsoft:azure_linux:grub2-pc, p-cpe:/a:microsoft:azure_linux:grub2-efi, p-cpe:/a:microsoft:azure_linux:grub2, p-cpe:/a:microsoft:azure_linux:grub2-efi-binary-noprefix, p-cpe:/a:microsoft:azure_linux:grub2-tools-minimal, p-cpe:/a:microsoft:azure_linux:grub2-efi-unsigned, x-cpe:/o:microsoft:azure_linux

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/8/2025

Vulnerability Publication Date: 7/29/2020

Reference Information

CVE: CVE-2020-14311

IAVA: 2020-A-0349