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105 lines
4.4 KiB
105 lines
4.4 KiB
13 years ago
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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="200801-09">
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<title>X.Org X server and Xfont library: Multiple vulnerabilities</title>
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<synopsis>
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Multiple vulnerabilities have been discovered in the X.Org X server and
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Xfont library, allowing for a local privilege escalation and arbitrary code
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execution.
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</synopsis>
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<product type="ebuild">xorg-server libXfont</product>
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<announced>January 20, 2008</announced>
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<revised>March 05, 2008: 03</revised>
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<bug>204362</bug>
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<bug>208343</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-r5</unaffected>
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<vulnerable range="lt">1.3.0.0-r5</vulnerable>
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</package>
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<package name="x11-libs/libXfont" auto="yes" arch="*">
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<unaffected range="ge">1.3.1-r1</unaffected>
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<vulnerable range="lt">1.3.1-r1</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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extension via iDefense:
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</p>
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<ul>
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<li>The XFree86-Misc extension does not properly sanitize a parameter
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within a PassMessage request, allowing the modification of a function
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pointer (CVE-2007-5760).</li>
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<li>Multiple functions in the XInput extension do not properly sanitize
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client requests for swapping bytes, leading to corruption of heap
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memory (CVE-2007-6427).</li>
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<li>Integer overflow vulnerabilities in the EVI extension and in the
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MIT-SHM extension can lead to buffer overflows (CVE-2007-6429).</li>
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<li>The TOG-CUP extension does not sanitize an index value in the
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ProcGetReservedColormapEntries() function, leading to arbitrary memory
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access (CVE-2007-6428).</li>
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<li>A buffer overflow was discovered in the Xfont library when
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processing PCF font files (CVE-2008-0006).</li>
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<li>The X server does not enforce restrictions when a user specifies a
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security policy file and attempts to open it (CVE-2007-5958).</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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Remote attackers could exploit the vulnerability in the Xfont library
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by enticing a user to load a specially crafted PCF font file resulting
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in the execution of arbitrary code with the privileges of the user
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running the X server, typically root. Local attackers could exploit
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this and the vulnerabilities in the X.org extensions to gain elevated
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privileges. If the X server allows connections from the network, these
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vulnerabilities could be exploited remotely. A local attacker could
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determine the existence of arbitrary files by exploiting the last
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vulnerability or possibly cause a Denial of Service.
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</p>
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</impact>
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<workaround>
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<p>
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Workarounds for some of the vulnerabilities can be found in the X.Org
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security advisory as listed under References.
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</p>
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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-r5"</code>
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<p>
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All X.Org Xfont library 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-libs/libXfont-1.3.1-r1"</code>
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</resolution>
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<references>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5760">CVE-2007-5760</uri>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5958">CVE-2007-5958</uri>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6427">CVE-2007-6427</uri>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6428">CVE-2007-6428</uri>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6429">CVE-2007-6429</uri>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0006">CVE-2008-0006</uri>
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<uri link="http://lists.freedesktop.org/archives/xorg/2008-January/031918.html">X.Org security advisory</uri>
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</references>
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<metadata tag="submitter" timestamp="Sat, 05 Jan 2008 02:03:56 +0000">
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rbu
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</metadata>
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<metadata tag="bugReady" timestamp="Thu, 17 Jan 2008 15:57:38 +0000">
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p-y
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</metadata>
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</glsa>
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