Amazon Linux 2023 : zsh, zsh-html (ALAS2023-2023-035)

high Nessus Plugin ID 173067

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2023-035 advisory.

A vulnerability was found in zsh in the parsecolorchar() function of prompt.c file. This flaw allows an attacker to perform code execution if they control a command output inside the prompt, as stated by a %F%K argument. This occurs because of recursive PROMPT_SUBST expansion. (CVE-2021-45444)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Solution

Run 'dnf update zsh --releasever=2023.0.20230222 ' to update your system.

Plugin Details

Severity: High

ID: 173067

File Name: al2023_ALAS2023-2023-035.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 3/21/2023

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 5.1

Temporal Score: 3.8

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

CVSS Score Source: CVE-2021-45444

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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:amazon:linux:zsh-debugsource, p-cpe:/a:amazon:linux:zsh-html, p-cpe:/a:amazon:linux:zsh-debuginfo, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:zsh

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/17/2023

Vulnerability Publication Date: 2/12/2022

Reference Information

CVE: CVE-2021-45444

Detections

Analytics