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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="202104-02">
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<title>X.Org X Server: Privilege escalation</title>
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<synopsis>A vulnerability in X.Org X Server may allow users to escalate
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privileges.
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</synopsis>
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<product type="ebuild">xorg-server</product>
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<announced>2021-04-30</announced>
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<revised count="1">2021-04-30</revised>
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<bug>782679</bug>
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<access>local, remote</access>
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<affected>
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<package name="x11-base/xorg-server" auto="yes" arch="*">
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<unaffected range="ge">1.20.11</unaffected>
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<vulnerable range="lt">1.20.11</vulnerable>
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</package>
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</affected>
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<background>
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<p>The X Window System is a graphical windowing system based on a
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client/server model.
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</p>
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</background>
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<description>
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<p>It was discovered that X.Org X Server did not sufficiently check the
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length of the XInput extension’s ChangeFeedbackControl request.
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</p>
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</description>
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<impact type="high">
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<p>An authorized attacker could possibly escalate privileges, or cause a
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Denial of Service condition.
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</p>
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</impact>
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<workaround>
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<p>There is no known workaround at this time.</p>
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</workaround>
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<resolution>
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<p>All X.Org X Server users should upgrade to the latest version:</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.20.11"
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</code>
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</resolution>
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<references>
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<uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-3472">CVE-2021-3472</uri>
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</references>
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<metadata tag="requester" timestamp="2021-04-30T21:51:09Z">whissi</metadata>
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<metadata tag="submitter" timestamp="2021-04-30T23:45:08Z">whissi</metadata>
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</glsa>
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