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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200512-18">
<title>XnView: Privilege escalation</title>
<synopsis>
XnView may search for shared libraries in an untrusted location,
potentially allowing local users to execute arbitrary code with the
privileges of another user.
</synopsis>
<product type="ebuild">xnview</product>
<announced>December 30, 2005</announced>
<revised>May 22, 2006: 02</revised>
<bug>117063</bug>
<access>local</access>
<affected>
<package name="x11-misc/xnview" auto="yes" arch="x86">
<unaffected range="ge">1.70-r1</unaffected>
<vulnerable range="lt">1.70-r1</vulnerable>
</package>
</affected>
<background>
<p>
XnView is an efficient multimedia viewer, browser and converter,
distributed free for non-commercial use.
</p>
</background>
<description>
<p>
Krzysiek Pawlik of Gentoo Linux discovered that the XnView package for
IA32 used the DT_RPATH field insecurely, causing the dynamic loader to
search for shared libraries in potentially untrusted directories.
</p>
</description>
<impact type="normal">
<p>
A local attacker could create a malicious shared object that would be
loaded and executed when a user attempted to use an XnView utility.
This would allow a malicious user to effectively hijack XnView and
execute arbitrary code with the privileges of the user running the
program.
</p>
</impact>
<workaround>
<p>
The system administrator may use the chrpath utility to remove the
DT_RPATH field from the XnView utilities:
</p>
<code>
# emerge app-admin/chrpath
# chrpath --delete /opt/bin/nconvert /opt/bin/nview /opt/bin/xnview</code>
</workaround>
<resolution>
<p>
All XnView users on the x86 platform should upgrade to the latest
version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=x11-misc/xnview-1.70-r1&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4595">CVE-2005-4595</uri>
</references>
<metadata tag="submitter" timestamp="Thu, 29 Dec 2005 17:05:23 +0000">
taviso
</metadata>
<metadata tag="bugReady" timestamp="Fri, 30 Dec 2005 12:33:06 +0000">
koon
</metadata>
</glsa>