high
7.8
CWE
119 191
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2020-14361: X.Org Server XkbSelectEvents Integer Underflow Privilege Escalation Vulnerability

First published: Mon Aug 17 2020(Updated: )

A flaw was found in X.Org Server before xorg-x11-server 1.20.9. An Integer underflow leading to heap-buffer overflow may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
X.org Xorg-server<1.20.9
Canonical Ubuntu Linux=14.04
Redhat Enterprise Linux=6.0
Redhat Enterprise Linux=7.0
Redhat Enterprise Linux=8.0
X.Org Server
redhat/xorg-x11-server<1.20.9
1.20.9
IBM Cloud Pak for Security (CP4S)<=1.7.2.0
IBM Cloud Pak for Security (CP4S)<=1.7.1.0
IBM Cloud Pak for Security (CP4S)<=1.7.0.0
debian/xorg-server
2:1.20.11-1+deb11u13
2:1.20.11-1+deb11u14
2:21.1.7-3+deb12u8
2:21.1.14-2
2:21.1.15-2

Remedy

https://lists.x.org/archives/xorg-announce/2020-August/003058.html

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-14361?

    CVE-2020-14361 is a vulnerability in X.Org Server that allows local attackers to escalate privileges on affected installations.

  • How severe is CVE-2020-14361?

    CVE-2020-14361 has a severity level of 7.8 (High).

  • How can I exploit CVE-2020-14361?

    To exploit CVE-2020-14361, an attacker must first obtain the ability to execute low-privileged code on the target system.

  • Is there a fix for CVE-2020-14361?

    Yes, updating X.Org Server to version 1.20.9 or higher is recommended to fix CVE-2020-14361.

  • Where can I find more information about CVE-2020-14361?

    You can find more information about CVE-2020-14361 on the MITRE CVE website, X.Org Server mailing list, and Red Hat Security website.

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