high
7.8
CWE
191
Advisory Published
CVE Published
Updated
Advisory Published

CVE-2020-14346: X.Org Server XIChangeHierarchy Integer Underflow Privilege Escalation Vulnerability

First published: Thu Jul 30 2020(Updated: )

A flaw was found in xorg-x11-server before 1.20.9. An integer underflow in the X input extension protocol decoding in the X server may lead to arbitrary access of memory contents. 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
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
2:21.1.15-2
X.Org xorg-server<1.20.9
Ubuntu Linux=14.04
Red Hat Enterprise Linux=6.0
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux=8.0
X.Org Xserver

Remedy

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

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-14346?

    CVE-2020-14346 is a vulnerability that allows local attackers to escalate privileges on affected installations of X.Org Server.

  • What is the severity of CVE-2020-14346?

    CVE-2020-14346 has a severity value of 7.8, which is considered high.

  • How can an attacker exploit CVE-2020-14346?

    An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

  • Which software versions are affected by CVE-2020-14346?

    CVE-2020-14346 affects X.Org Server versions up to and including 1.20.9.

  • Where can I find more information about CVE-2020-14346?

    You can find more information about CVE-2020-14346 on the MITRE CVE website, the X.Org Server announcement, and the Red Hat security advisory.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203