Amazon Linux 2023 : byacc (ALAS2023-2023-204)

high Nessus Plugin ID 176917

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Synopsis

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

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-204 advisory.

- When processing files, malloc stores the data of the current line. When processing comments, malloc incorrectly accesses the released memory (use after free). (CVE-2021-33641)

- When a file is processed, an infinite loop occurs in next_inline() of the more_curly() function.
(CVE-2021-33642)

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

Solution

Run 'dnf update byacc --releasever 2023.0.20230607' to update your system.

Plugin Details

Severity: High

ID: 176917

File Name: al2023_ALAS2023-2023-204.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 6/8/2023

Updated: 9/27/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2021-33641

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:byacc, p-cpe:/a:amazon:linux:byacc-debuginfo, p-cpe:/a:amazon:linux:byacc-debugsource, cpe:/o:amazon:linux:2023

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/5/2023

Vulnerability Publication Date: 1/20/2023

Reference Information

CVE: CVE-2021-33641, CVE-2021-33642

Detections

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