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CBL Mariner 2.0 Security Update: CBL-Mariner Releases / grub2 (CVE-2020-14310)

medium Nessus Plugin ID 241889

Synopsis

The remote CBL Mariner host is missing one or more security updates.

Description

The version of CBL-Mariner Releases / grub2 installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2020-14310 advisory.

 - There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker May leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow. (CVE-2020-14310)

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-2020-14310

Plugin Details

Severity: Medium

ID: 241889

File Name: mariner_CVE-2020-14310.nasl

Version: 1.3

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-2020-14310

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

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/CBLMariner/release, Host/CBLMariner/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-2020-14310

IAVA: 2020-A-0349