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Amazon Linux 2 : xorg-x11-server (ALAS-2021-1592)

high Nessus Plugin ID 145452

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Synopsis

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

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2021-1592 advisory.

 A flaw was found in the way the Xserver memory was not properly initialized. This issue leak parts of server memory to the X client. In cases where the Xorg server runs with elevated privileges, this flaw results in a possible ASLR bypass. (CVE-2020-14347)

 A flaw was found in the X.Org Server. An out-of-bounds access in the XkbSetMap function may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2020-14360)

 A flaw was found in xorg-x11-server. A heap-buffer overflow in XkbSetDeviceInfo may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2020-25712)

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 'yum update xorg-x11-server' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2021-1592.html

https://access.redhat.com/security/cve/CVE-2020-14347

https://access.redhat.com/security/cve/CVE-2020-14360

https://access.redhat.com/security/cve/CVE-2020-25712

Plugin Details

Severity: High

ID: 145452

File Name: al2_ALAS-2021-1592.nasl

Version: 1.4

Type: local

Agent: unix

Published: 1/26/2021

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: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

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

CVSS Score Source: CVE-2020-14360

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

CVSS Score Source: CVE-2020-25712

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:xorg-x11-server-xephyr, p-cpe:/a:amazon:linux:xorg-x11-server-debuginfo, p-cpe:/a:amazon:linux:xorg-x11-server-common, p-cpe:/a:amazon:linux:xorg-x11-server-devel, p-cpe:/a:amazon:linux:xorg-x11-server-xdmx, p-cpe:/a:amazon:linux:xorg-x11-server-xwayland, p-cpe:/a:amazon:linux:xorg-x11-server-source, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:xorg-x11-server-xvfb, p-cpe:/a:amazon:linux:xorg-x11-server-xnest, p-cpe:/a:amazon:linux:xorg-x11-server-xorg

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 1/25/2021

Vulnerability Publication Date: 8/5/2020

Reference Information

CVE: CVE-2020-14347, CVE-2020-14360, CVE-2020-25712

ALAS: 2021-1592