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

CVE-2020-14362: X.Org Server XRecordRegisterClients 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
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
X.Org Server
redhat/xorg-x11-server<1.20.9
1.20.9
ubuntu/xorg-server<2:1.19.6-1ubuntu4.5
2:1.19.6-1ubuntu4.5
ubuntu/xorg-server<2:1.20.8-2ubuntu2.3
2:1.20.8-2ubuntu2.3
ubuntu/xorg-server<2:1.15.1-0ubuntu2.11+
2:1.15.1-0ubuntu2.11+
ubuntu/xorg-server<1.20.9
1.20.9
ubuntu/xorg-server<2:1.18.4-0ubuntu0.9
2:1.18.4-0ubuntu0.9
ubuntu/xorg-server-hwe-16.04<1.20.9
1.20.9
ubuntu/xorg-server-hwe-16.04<2:1.19.6-1ubuntu4.1~16.04.3
2:1.19.6-1ubuntu4.1~16.04.3
ubuntu/xorg-server-hwe-18.04<2:1.20.8-2ubuntu2.2~18.04.2
2:1.20.8-2ubuntu2.2~18.04.2
ubuntu/xorg-server-hwe-18.04<1.20.9
1.20.9
debian/xorg-server
2:1.20.4-1+deb10u4
2:1.20.4-1+deb10u14
2:1.20.11-1+deb11u11
2:1.20.11-1+deb11u13
2:21.1.7-3+deb12u5
2:21.1.7-3+deb12u7
2:21.1.12-1

Remedy

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

Remedy

https://gitlab.freedesktop.org/xorg/xserver/-/commit/2902b78535ecc6821cc027351818b28a5c7fdbdc

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-14362?

    CVE-2020-14362 is a vulnerability that allows local attackers to escalate privileges on affected installations of X.Org Server.

  • How severe is CVE-2020-14362?

    CVE-2020-14362 has a severity rating of 7.8 (High).

  • How do I fix CVE-2020-14362?

    To fix CVE-2020-14362, update X.Org Server to version 2:1.19.6-1ubuntu4.5 or apply the appropriate patch from the vendor.

  • Which software is affected by CVE-2020-14362?

    X.Org Server versions 2:1.19.6-1ubuntu4.5 and earlier are affected by CVE-2020-14362.

  • Where can I find more information about CVE-2020-14362?

    You can find more information about CVE-2020-14362 on the Red Hat Bugzilla, X.Org Server Announcement, and Ubuntu Security Notices websites.

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