Detections
Analytics

Amazon Linux AMI : libX11 (ALAS-2021-1517)

critical Nessus Plugin ID 151511

Language:

Synopsis

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

Description

The version of libX11 installed on the remote host is prior to 1.6.0-2.2.14. It is, therefore, affected by a vulnerability as referenced in the ALAS-2021-1517 advisory.

 A missing validation flaw was found in libX11. This flaw allows an attacker to inject X11 protocol commands on X clients, and in some cases, also bypass, authenticate (via injection of control characters), or potentially execute arbitrary code with permissions of the application compiled with libX11. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
 (CVE-2021-31535)

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 libX11' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2021-1517.html

https://access.redhat.com/security/cve/CVE-2021-31535

Plugin Details

Severity: Critical

ID: 151511

File Name: ala_ALAS-2021-1517.nasl

Version: 1.4

Type: local

Agent: unix

Published: 7/13/2021

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: 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-2021-31535

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:libx11-debuginfo, p-cpe:/a:amazon:linux:libx11, p-cpe:/a:amazon:linux:libx11-common, cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:libx11-devel

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: 7/8/2021

Vulnerability Publication Date: 5/27/2021

Reference Information

CVE: CVE-2021-31535

ALAS: 2021-1517