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Amazon Linux 2023 : libxml2, libxml2-devel, libxml2-static (ALAS2023-2023-163)

medium Nessus Plugin ID 175081

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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 ALAS2023-2023-163 advisory.

 A NULL pointer dereference exists when parsing (invalid) XML schemas in libxml2 xmlSchemaCheckCOSSTDerivedOK (CVE-2023-28484)

 libxml2 Hashing of empty dict strings isn't deterministic. When hashing empty strings which aren't null- terminated, xmlDictComputeFastKey could produce inconsistent results. This could lead to various logic or memory errors, including double frees. (CVE-2023-29469)

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 libxml2 --releasever 2023.0.20230503' to update your system.

See Also

https://alas.aws.amazon.com/AL2023/ALAS-2023-163.html

https://alas.aws.amazon.com/cve/html/CVE-2023-28484.html

https://alas.aws.amazon.com/cve/html/CVE-2023-29469.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: Medium

ID: 175081

File Name: al2023_ALAS2023-2023-163.nasl

Version: 1.3

Type: local

Agent: unix

Published: 5/3/2023

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: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2023-29469

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/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:libxml2-devel, p-cpe:/a:amazon:linux:libxml2-debuginfo, p-cpe:/a:amazon:linux:python3-libxml2, p-cpe:/a:amazon:linux:libxml2-debugsource, p-cpe:/a:amazon:linux:libxml2, p-cpe:/a:amazon:linux:python3-libxml2-debuginfo, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:libxml2-static

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: 4/27/2023

Vulnerability Publication Date: 4/13/2023

Reference Information

CVE: CVE-2023-28484, CVE-2023-29469