Alibaba Cloud Linux 3 : 0164: grub2, mokutil, shim, and shim-unsigned-x64 (ALINUX3-SA-2022:0164)

high Nessus Plugin ID 236637

Synopsis

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

Description

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0164 advisory.

Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

CVE-2021-3695:
A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12.

CVE-2021-3696:
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

CVE-2021-3697:
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-2022-28733:
** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

CVE-2022-28734:
** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

CVE-2022-28735:
** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

CVE-2022-28736:
** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

CVE-2022-28737:
** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 236637

File Name: alinux3_sa_2022-0164.nasl

Version: 1.1

Type: local

Family: Alibaba Cloud Linux Local Security Checks

Published: 5/14/2025

Updated: 5/14/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

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

CVSS Score Source: CVE-2021-3696

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

CVSS Score Source: CVE-2022-28733

Vulnerability Information

CPE: p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-efi-ia32, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-pc, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:mokutil, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-efi-ia32-cdboot, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-tools-efi-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-efi-aa64-modules, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-efi-aa64-cdboot, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-debugsource, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-tools-extra, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-tools-extra-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-tools-minimal, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-efi-ia32-modules, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-efi-aa64, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-efi-x64-cdboot, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-tools-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:mokutil-debugsource, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-efi-x64-modules, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:shim-x64, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:shim-aa64, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-pc-modules, cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-tools-minimal-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-tools, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:shim-ia32, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:mokutil-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-common, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-efi-x64, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:grub2-tools-efi

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/29/2022

Vulnerability Publication Date: 6/16/2022

Reference Information

CVE: CVE-2021-3695, CVE-2021-3696, CVE-2021-3697, CVE-2022-28733, CVE-2022-28734, CVE-2022-28735, CVE-2022-28736, CVE-2022-28737

Detections

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