96 lines
3.5 KiB
XML
96 lines
3.5 KiB
XML
<?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="200806-07">
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<title>X.Org X server: Multiple vulnerabilities</title>
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<synopsis>
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Multiple vulnerabilities have been discovered in the X.Org X server,
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possibly allowing for the remote execution of arbitrary code with root
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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>2008-06-19</announced>
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<revised count="01">2008-06-19</revised>
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<bug>225419</bug>
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<access>remote, local</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">1.3.0.0-r6</unaffected>
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<vulnerable range="lt">1.3.0.0-r6</vulnerable>
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</package>
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</affected>
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<background>
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<p>
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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>
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Regenrecht reported multiple vulnerabilities in various X server
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extensions via iDefense:
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</p>
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<ul>
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<li>The
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SProcSecurityGenerateAuthorization() and SProcRecordCreateContext()
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functions of the RECORD and Security extensions are lacking proper
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parameter validation (CVE-2008-1377).</li>
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<li>An integer overflow is
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possible in the function ShmPutImage() of the MIT-SHM extension
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(CVE-2008-1379).</li>
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<li>The RENDER extension contains several
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possible integer overflows in the AllocateGlyph() function
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(CVE-2008-2360) which could possibly lead to a heap-based buffer
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overflow. Further possible integer overflows have been found in the
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ProcRenderCreateCursor() function (CVE-2008-2361) as well as in the
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SProcRenderCreateLinearGradient(), SProcRenderCreateRadialGradient()
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and SProcRenderCreateConicalGradient() functions (CVE-2008-2362).</li>
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</ul>
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</description>
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<impact type="high">
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<p>
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Exploitation of these vulnerabilities could possibly lead to the remote
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execution of arbitrary code with root privileges, if the server is
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running as root, which is the default. It is also possible to crash the
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server by making use of these vulnerabilities.
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</p>
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</impact>
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<workaround>
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<p>
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It is possible to avoid these vulnerabilities by disabling the affected
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server extensions. Therefore edit the configuration file
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(/etc/X11/xorg.conf) to contain the following in the appropriate
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places:
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</p>
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<code>
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Section "Extensions"
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Option "MIT-SHM" "disable"
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Option "RENDER" "disable"
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Option "SECURITY" "disable"
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EndSection
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Section "Module"
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Disable "record"
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EndSection</code>
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</workaround>
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<resolution>
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<p>
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All X.org X Server users should upgrade to the latest version:
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</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.3.0.0-r6"</code>
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</resolution>
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<references>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1377">CVE-2008-1377</uri>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1379">CVE-2008-1379</uri>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2360">CVE-2008-2360</uri>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2361">CVE-2008-2361</uri>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2362">CVE-2008-2362</uri>
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</references>
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<metadata tag="submitter" timestamp="2008-06-11T10:16:02Z">
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vorlon
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</metadata>
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<metadata tag="bugReady" timestamp="2008-06-16T08:09:32Z">
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vorlon
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</metadata>
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</glsa>
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