Detections
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Amazon Linux 2022 : libxml2 (ALAS2022-2022-258)

high Nessus Plugin ID 168587

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Synopsis

The remote Amazon Linux 2022 host is missing a security update.

Description

The version of libxml2 installed on the remote host is prior to 2.10.3-2. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2022-2022-258 advisory.

 - An issue was discovered in libxml2 before 2.10.3. When parsing a multi-gigabyte XML document with the XML_PARSE_HUGE parser option enabled, several integer counters can overflow. This results in an attempt to access an array at a negative 2GB offset, typically leading to a segmentation fault. (CVE-2022-40303)

 - An issue was discovered in libxml2 before 2.10.3. Certain invalid XML entity definitions can corrupt a hash table key, potentially leading to subsequent logic errors. In one case, a double-free can be provoked. (CVE-2022-40304)

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 libxml2' to update your system.

See Also

https://alas.aws.amazon.com/AL2022/ALAS-2022-258.html

https://alas.aws.amazon.com/cve/html/CVE-2022-40303.html

https://alas.aws.amazon.com/cve/html/CVE-2022-40304.html

Plugin Details

Severity: High

ID: 168587

File Name: al2022_ALAS2022-2022-258.nasl

Version: 1.3

Type: local

Agent: unix

Published: 12/10/2022

Updated: 12/12/2022

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: 7.2

Temporal Score: 5.6

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

CVSS Score Source: CVE-2022-40304

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libxml2, p-cpe:/a:amazon:linux:libxml2-debuginfo, p-cpe:/a:amazon:linux:libxml2-debugsource, p-cpe:/a:amazon:linux:libxml2-devel, p-cpe:/a:amazon:linux:libxml2-static, p-cpe:/a:amazon:linux:python3-libxml2, p-cpe:/a:amazon:linux:python3-libxml2-debuginfo, cpe:/o:amazon:linux:2022

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: 12/6/2022

Vulnerability Publication Date: 10/31/2022

Reference Information

CVE: CVE-2022-40303, CVE-2022-40304