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+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
+<glsa id="200710-16">
+ <title>X.Org X server: Composite local privilege escalation</title>
+ <synopsis>
+ A vulnerability has been discovered in the Composite extension of the X.Org
+ X server, allowing for a local privilege escalation.
+ </synopsis>
+ <product type="ebuild">X.Org</product>
+ <announced>2007-10-14</announced>
+ <revised count="01">2007-10-14</revised>
+ <bug>191964</bug>
+ <access>local</access>
+ <affected>
+ <package name="x11-base/xorg-server" auto="yes" arch="*">
+ <unaffected range="ge">1.3.0.0-r1</unaffected>
+ <vulnerable range="lt">1.3.0.0-r1</vulnerable>
+ </package>
+ </affected>
+ <background>
+ <p>
+ The X Window System is a graphical windowing system based on a
+ client/server model.
+ </p>
+ </background>
+ <description>
+ <p>
+ Aaron Plattner discovered a buffer overflow in the compNewPixmap()
+ function when copying data from a large pixel depth pixmap into a
+ smaller pixel depth pixmap.
+ </p>
+ </description>
+ <impact type="high">
+ <p>
+ A local attacker could execute arbitrary code with the privileges of
+ the user running the X server, typically root.
+ </p>
+ </impact>
+ <workaround>
+ <p>
+ Disable the Composite extension by setting ' Option "Composite"
+ "disable" ' in the Extensions section of xorg.conf.
+ </p>
+ <p>
+ Note: This could affect the functionality of some applications.
+ </p>
+ </workaround>
+ <resolution>
+ <p>
+ All X.Org X server users should upgrade to the latest version:
+ </p>
+ <code>
+ # emerge --sync
+ # emerge --ask --oneshot --verbose "&gt;=x11-base/xorg-server-1.3.0.0-r1"</code>
+ </resolution>
+ <references>
+ <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4730">CVE-2007-4730</uri>
+ </references>
+ <metadata tag="requester" timestamp="2007-10-02T20:35:12Z">
+ p-y
+ </metadata>
+ <metadata tag="bugReady" timestamp="2007-10-02T20:35:33Z">
+ p-y
+ </metadata>
+ <metadata tag="submitter" timestamp="2007-10-08T00:30:05Z">
+ rbu
+ </metadata>
+</glsa>