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)

Tenable has extracted the preceding description block directly from the tested product 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

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: 1.2

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 6/8/2023

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

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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