[gentoo-announce] [ GLSA 202104-02 ] X.Org X Server: Privilege escalation

– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – Gentoo Linux Security Advisory GLSA 202104-02 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – security.gentoo.org/ – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Severity: High Title: X.Org X Server: Privilege escalation Date: April 30, 2021 Bugs: #782679 ID: 202104-02
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Synopsis ========
A vulnerability in X.Org X Server may allow users to escalate privileges.
Background ==========
The X Window System is a graphical windowing system based on a client/server model.
Affected packages =================
——————————————————————- Package / Vulnerable / Unaffected ——————————————————————- 1 x11-base/xorg-server < 1.20.11 >= 1.20.11
Description ===========
It was discovered that X.Org X Server did not sufficiently check the length of the XInput extension’s ChangeFeedbackControl request.
Impact ======
An authorized attacker could possibly escalate privileges, or cause a Denial of Service condition.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All X.Org X Server users should upgrade to the latest version:
# emerge –sync # emerge –ask –oneshot –verbose “>=x11-base/xorg-server-1.20.11”
References ==========
[ 1 ] CVE-2021-3472 nvd.nist.gov/vuln/detail/CVE-2021-3472
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
security.gentoo.org/glsa/202104-02
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users’ machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at bugs.gentoo.org.
License =======
Copyright 2021 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons – Attribution / Share Alike license.
creativecommons.org/licenses/by-sa/2.5