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CBL Mariner 2.0 Security Update: grub2 (CVE-2021-3697)

high Nessus Plugin ID 201789

Synopsis

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

Description

The version of 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-2021-3697 advisory.

 - A crafted JPEG image May lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12. (CVE-2021-3697)

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-2021-3697

Plugin Details

Severity: High

ID: 201789

File Name: mariner_CVE-2021-3697.nasl

Version: 1.1

Type: local

Published: 7/3/2024

Updated: 7/3/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.3

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

CVSS Score Source: CVE-2021-3697

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/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, p-cpe:/a:microsoft:cbl-mariner:grub2-efi-binary-noprefix, x-cpe:/o:microsoft:cbl-mariner, p-cpe:/a:microsoft:cbl-mariner:grub2-efi-unsigned, p-cpe:/a:microsoft:cbl-mariner:grub2-rpm-macros, p-cpe:/a:microsoft:cbl-mariner:grub2-configuration, p-cpe:/a:microsoft:cbl-mariner:grub2, p-cpe:/a:microsoft:cbl-mariner:grub2-pc, p-cpe:/a:microsoft:cbl-mariner:grub2-efi

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: 7/1/2024

Vulnerability Publication Date: 6/16/2022

Reference Information

CVE: CVE-2021-3697