Amazon Linux 2 : unzip (ALAS-2023-1906)

medium Nessus Plugin ID 170441


The remote Amazon Linux 2 host is missing a security update.


The version of unzip installed on the remote host is prior to 6.0-57. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-1906 advisory.

- A flaw was found in unzip. The vulnerability occurs due to improper handling of Unicode strings, which can lead to a null pointer dereference. This flaw allows an attacker to input a specially crafted zip file, leading to a crash or code execution. (CVE-2021-4217)

- A flaw was found in Unzip. The vulnerability occurs during the conversion of a wide string to a local string that leads to a heap of out-of-bound write. This flaw allows an attacker to input a specially crafted zip file, leading to a crash or code execution. (CVE-2022-0529, CVE-2022-0530)

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


Run 'yum update unzip' to update your system.

See Also

Plugin Details

Severity: Medium

ID: 170441

File Name: al2_ALAS-2023-1906.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/24/2023

Updated: 9/6/2023

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

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

CVSS Score Source: CVE-2022-0530


Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:unzip, p-cpe:/a:amazon:linux:unzip-debuginfo, cpe:/o:amazon:linux:2

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/18/2023

Vulnerability Publication Date: 2/9/2022

Reference Information

CVE: CVE-2021-4217, CVE-2022-0529, CVE-2022-0530