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Amazon Linux 2 : python-lxml (ALAS-2021-1666)

high Nessus Plugin ID 150966

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Synopsis

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

Description

The version of python-lxml installed on the remote host is prior to 3.2.1-4. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2021-1666 advisory.

 A Cross-site Scripting (XSS) vulnerability was found in the python-lxml's clean module. The module's parser did not properly imitate browsers, causing different behaviors between the sanitizer and the user's page. This flaw allows a remote attacker to run arbitrary HTML/JS code. The highest threat from this vulnerability is to confidentiality and integrity. (CVE-2020-27783)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Solution

Run 'yum update python-lxml' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2021-1666.html

https://access.redhat.com/security/cve/CVE-2020-27783

Plugin Details

Severity: High

ID: 150966

File Name: al2_ALAS-2021-1666.nasl

Version: 1.4

Type: local

Agent: unix

Published: 6/23/2021

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Low

Score: 3.8

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

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

CVSS Score Source: CVE-2020-27783

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.5

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

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

CVSS v4

Risk Factor: High

Base Score: 8.9

Threat Score: 8.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:python-lxml-docs, p-cpe:/a:amazon:linux:python-lxml-debuginfo, p-cpe:/a:amazon:linux:python-lxml, 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: 6/16/2021

Vulnerability Publication Date: 12/3/2020

Reference Information

CVE: CVE-2020-27783

ALAS: 2021-1666