Amazon Linux 2 : expat (ALAS-2022-1809)

critical Nessus Plugin ID 163227

Synopsis

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

Description

The version of expat installed on the remote host is prior to 2.1.0-14. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2022-1809 advisory.

- In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize. (CVE-2021-46143)

- addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22822)

- build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22823)

- defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
(CVE-2022-22824)

- lookup in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22825)

- nextScaffoldPart in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
(CVE-2022-22826)

- storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22827)

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

Solution

Run 'yum update expat' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2022-1809.html

https://alas.aws.amazon.com/cve/html/CVE-2021-46143.html

https://alas.aws.amazon.com/cve/html/CVE-2022-22822.html

https://alas.aws.amazon.com/cve/html/CVE-2022-22823.html

https://alas.aws.amazon.com/cve/html/CVE-2022-22824.html

https://alas.aws.amazon.com/cve/html/CVE-2022-22825.html

https://alas.aws.amazon.com/cve/html/CVE-2022-22826.html

https://alas.aws.amazon.com/cve/html/CVE-2022-22827.html

Plugin Details

Severity: Critical

ID: 163227

File Name: al2_ALAS-2022-1809.nasl

Version: 1.3

Type: local

Agent: unix

Published: 7/15/2022

Updated: 10/17/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2022-22824

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:expat, p-cpe:/a:amazon:linux:expat-debuginfo, p-cpe:/a:amazon:linux:expat-devel, p-cpe:/a:amazon:linux:expat-static, 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: 7/6/2022

Vulnerability Publication Date: 1/6/2022

Reference Information

CVE: CVE-2021-46143, CVE-2022-22822, CVE-2022-22823, CVE-2022-22824, CVE-2022-22825, CVE-2022-22826, CVE-2022-22827